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EVALUATING HYDROLOGICAL RESPONSE TO FORECASTED LAND-USE CHANGE: SCENARIO TESTING WITH THE AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT TOOL |
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Studies of future management and policy options based on different
assumptions provide a mechanism to examine possible outcomes and especially their likely benefits or consequence...
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HISTORICAL ANALYSIS OF THE RELATIONSHIP OF STREAMFLOW FLASHINESS WITH POPULATION DENSITY, IMPERVIOUSNESS, AND PERCENT URBAN LAND COVER IN THE MID-ATLANTIC REGION |
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Historical US Census population data was used to estimate population
density for 1930-2000 and satellite imagery from circa 1973, 1992, and 2001 was used to estimate the degree of...
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HISTORICAL ANALYSIS OF THE RELATIONSHIP OF STREAMFLOW FLASHINESS WITH POPULATION DENSITY, IMPERVIOUSNESS, AND PERCENT URBAN LAND COVER IN THE MID-ATLANTIC REGION |
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Methods: This study is an examination of the relationship between stream flashiness and watershed-scale estimates of percent imperviousness, degree of urban development, and popula...
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(18)OS04 AND (18)OH20 AS PROSPECTIVE INDICATORS OF ELEVATED ARSENIC IN THE GOOSE RIVER GROUND-WATERSHED, MAINE |
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Anomalous geogenic arsenic occurs in drinking water from the Goose River crystalline ground-watershed in mid-coastal Maine. Isotope investigations were useful in understanding rele...
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(226) RA AND (228) RA ACTIVITIES ASSOCIATED WITH AGRICULTURAL DRAINAGE PONDS AND WETLAND PONDS IN THE KANKAKEE WATERSHED, IL-IN, USA |
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Background radioactivity is elevated in many agricultural drainage ponds and also constructed wetland ponds in the Kankakee watershed. During 1995-1999, gross-a and -B activities w...
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2007 WATERSHED CLASSIFICATION AS A TOOL TO PARTITION VARIANCE IN NUTRIENT-BIOLOGICAL RESPONSE RELATIONSHIPS |
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platform presentation at a scientific meeting...
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A 25-YEAR HISTORY OF LAND COVER CHANGE IN THE SAN PEDRO RIVER |
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Vegetation change in the American West has been a subject of concern throughout the twentieth century. Although many of the changes have been recorded qualitatively through the...
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A BASIN-WIDE ANALYSIS OF THE DYNAMICS OF FECAL CONTAMINATION AND FECAL SOURCE IDENTIFICATION IN TILLAMOOK BAY, OREGON |
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The objectives of this study were to determine if spatial and temporal dynamics exist in source-specific Bacteroidales 16S rRNA genetic marker data across a watershed, to ...
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A CASE STUDY OF ENVIRONMENTAL DATA MANAGEMENT |
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In order to support our ongoing research in watershed ecology and global climate change, we gather and analyze environmental data from several government agencies. This case study ...
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A CASE STUDY OF NONPOINT SOURCES BACTERIAL CONTRIBUTION TO RURAL SURFACE WATER |
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The presentation will address several bacterial issues affecting the Turkey Creek (TC) watershed, in north central Ok. Our results from seasonal stream Escherichia coli (E. coli) ...
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A CASE STUDY OF THE REFERENCE CONDITION APPROACH TO NITROGEN MANAGEMENT IN ESTUARIES |
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One way to estimate estuarine response to changes in nitrogen loading in coastal systems is by using a reference approach. This talk details the application of paleoecological anal...
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A CLASSIFICATION OF U.S. ESTUARIES BASED ON PHYSICAL, HYDROLOGIC ATTRIBUTES |
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A classification of U.S. estuaries is presented based on estuarine characteristics that have been identified as important for quantifying stressor-response
relationships in...
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A COLLABORATIVE EFFORT TO COLLECT BIOLOGICAL, CHEMICAL AND GEOLOGICAL DATA TO QUANTIFY THE INTERRELATIONSHIPS WHICH INFLUENCE STREAM IMPAIRMENT |
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The evaluation of the current condition is critical to the management of streams impaired by sediment and other non-point source stressors, which adversely affect both physical hab...
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A COMPARATIVE ANALYSIS OF NUTRIENT LOADING, NUTRIENT RETENTION AND NET ECOSYSTEM METABOLISM IN THREE TIDAL RIVER ESTUARIES DIFFERING PREDOMINATELY BY THEIR WATERSHED LAND USE TYPES. |
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Abstract and oral presentation for the Estuarine Research Federation Conference.
Estuarine retention of watershed nutrient loads, system-wide nutrient biogeochemical fluxes,...
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A COMPARISON OF APPROACHES TO PRIORITIZING SITES FOR RIPARIAN RESTORATION |
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This study compares the results of Olson and Harris (1997) and Russell et al.(1997)in their work to prioritize sites for riparian restoration in the San Luis Rey River watershed. O...
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A COMPARISON OF RAIN-RELATED PHOSPHORUS AND NITROGEN LOADING FROM URBAN, WETLAND, AND AGRICULTURAL SOURCES |
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Comprehensive watershed studies have been conducted for two lakes located in the Lake Michigan drainage system. Studies were conducted from March through October of 1979. During th...
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A COMPARISON OF THE SALINITY REGIME ALONG THE TEXAS COAST WITH TERRESTRIAL VEGETATION GREENNESS AND WATER USE IN THE GALVESTON BAY WATERSHED USING REMOTING SENSING |
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Variability in vegetation greenness was determined for the Galveston Bay watershed using biweekly Normalized Difference Vegetation Index (NDVI) data derived from the Advanced Very ...
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A COMPREHENISVE NONPOINT SOURCE FIELD STUDY FOR SEDIMENT, NUTRIENTS AND PATHOGENS IN THE SOUTH FORK BROAD RIVER WATERSHED IN NORTHEAST GEORGIA |
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There is an urgent need for EPA to develop protocols for establishing Total Maximum Daily Loads (TMDLs) in streams, lakes and estuaries. A cooperative TMDL field data collection p...
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A COMPREHENSIVE NONPOINT SOURCE FIELD STUDY FOR SEDIMENT, NUTRIENTS AND PATHOGENS IN THE SOUTH FORK BROAD RIVER WATERSHED, GEORGIA |
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There is an urgent need for EPA to develop protocols for establishing Total Maximum Daily Loads (TMDLs) in streams, lakes and estuaries. A cooperative TMDL field data collection p...
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A COMPREHENSIVE NONPOINT SOURCE FIELD STUDY FOR SEDIMENT, NUTRIENTS, AND PATHOGENS IN THE SOUTH FORK BROAD RIVER WATERSHED IN NORTHEAST GEORGIA |
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This technical report provides a description of the field project design, quality control, the sampling protocols and analysis methodology used, and standard operating procedures f...
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A COMPUTATIONAL FRAMEWORK FOR EVALUATION OF NPS MANAGEMENT SCENARIOS: ROLE OF PARAMETER UNCERTAINTY |
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Utility of complex distributed-parameter watershed models for evaluation of the effectiveness of non-point source sediment and nutrient abatement scenarios such as Best Management ...
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A COMPUTATIONAL FRAMEWORK FOR EVALUATION OF NPS MANAGEMENT SCENARIOS: ROLE OF PARAMETER UNCERTAINTY |
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Utility of complex distributed-parameter watershed models for evaluation of the effectiveness of non-point source sediment and nutrient abatement scenarios such as Best Management ...
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A CONCEPTUAL MODEL FOR MULTI-SCALAR ASSESSMENTS OF ESTUARINE ECOLOGICAL INTEGRITY |
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A conceptual model was developed that relates an estuarine system's anthropogenic inputs to it's ecological integrity. Ecological integrity is operationally defined as an emergent ...
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A DATA BROWSER FOR THE SAN PEDRO RIVER WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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A DATA SYSTEM FOR INTEGRATING DATA FROM LANDSCAPES, STREAMS AND ESTUARIES |
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Estuaries are natural integrators of substances and processes that occur internally and externally (watersheds, ocean, atmosphere). Watershed activities that contribute fresh water...
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A DYNAMIC SIMULATOR OF ENVIRONMENTAL CHEMICAL PARTITIONING |
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A version of the Community Multiscale Air Quality (CMAQ) model has been developed by the U.S. EPA that is capable of addressing the atmospheric fate, transport and deposition of ...
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A FIELD STUDY TO COMPARE PERFORMANCE OF STAINLESS STEEL RESEARCH MONITORING WELLS WITH EXISTING ON-FARM DRINKING WATER WELLS IN MEASURING PESTICIDE AND NITRATE CONCENTRATIONS |
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Existing drinking wells are widely used for the collection of ground water samples to evaluate chemical contamination. A well comparison study was conducted to compare pesticide an...
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A FIRST APPROXIMATION OF IMPERVIOUS SURFACES ACROSS THE DANUBE RIVER BASIN USING THE CORINE LAND COVER DATABASE AND POTENTIAL RELATIONSHIPS TO FLOODING RISKS |
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This last year, broad geographic areas in Europe experienced significant levels of flooding causing extensive loss of human lives and property. In North America, the US Environment...
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A GEOMORPHOLOGICALLY-BASED SEMI-DISTRIBUTED WATERSHED MODEL. (R824995) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A GEOMORPHOLOGY-BASED SEMI-DISTRIBUTED WATERSHED MODEL. (R824995) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A GIS-BASED MULTI-SCALE APPROACH TO HABITAT MODEL FOR THE COMMON LOON, GAVIA IMMER, IN NEW HAMPSHIRE, USA. |
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The U.S. EPA National Health and Environmental Effects Research Laboratory's (NHEERL) Wildlife Research Strategy was developed to provide methods, models and data to address concer...
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A LANDSCAPE ANALYSIS OF NEW YORK CITY'S WATER SUPPLY (1973-1998) |
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Currently the city of New York is trying to save taxpayers the cost of a billion dollar filtration system by protecting water quality through implementing a long-range watershed pr...
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A LANDSCAPE APPROACH FOR ASSESSING ECOLOGICAL RISK IN A SOUTHWESTERN WATERSHED - SAN PEDRO RIVER CASE STUDY |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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A LANDSCAPE APPROACH FOR EVALUATIONG CHANGE IN A SEMI-ARID ENVIRONMENT AND A SUBSEQUENT ANALYSIS OF THE HYDROLOGICAL CONSEQUENCES |
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Vegetation change in the American West has been a subject of concern throughout the past century. Although many of the changes have been recorded qualitatively through the use of c...
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A LANDSCAPE APPROACH TO MONITORING AND ASSESSING ENVIRONMENTAL CONDITION IN THE UPPER SAN PEDRO RIVER BASIN |
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Vegetation change in the American West has been the subject of much concern and controversy throughout the twentieth century. Over the years, a considerable number and variety of c...
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A LANDSCAPE ATLAS OF ECOLOGICAL VULNERABILITY: ARKANSAS' WHITE RIVER WATERSHED AND THE MISSISSIPPI ALLUVIAL VALLEY |
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In July, 2000 the U.S. EPA's Office of Research and Development was requested to collaborate in a U.S. EPA Region 6 'Regional Applied Research Effort' (RARE). The primary goal of ...
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A LANDSCAPE ATLAS OF THE CHESAPEAKE BAY WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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A LANDSCAPE ECOLOGY ANALYSIS OF THE GREAT LAKES BASIN |
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The U.S. Environmental Protection Agency (EPA) and Natural Resources Canada: Canada Centre for Remote Sensing (CCRS) are conducting a cooperative research landscape ecological stud...
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A MAIL SURVEY APPROACH TO WATERSHED CONDITION ASSESSMENT |
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Aquatic resource monitoring attempts to assess the condition of aquatic habitat and organisms. Assessments require that disturbances from human activities be identified, quantifie...
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A MECHANISTIC MODEL OF RUNOFF-ASSOCIATED FECAL COLIFORM FATE AND TRANSPORT THROUGH A COASTAL LAGOON. (R828676C003) |
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Fecal coliform (FC) contamination in coastal waters is an ongoing public health problem worldwide. Coastal wetlands and lagoons are typically expected to protect coastal waters ...
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A METHODOLOGY FOR ESTIMATING UNCERTAINTY OF A DISTRIBUTED HYDROLOGIC MODEL: APPLICATION TO POCONO CREEK WATERSHED |
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Utility of distributed hydrologic and water quality models for watershed management and sustainability studies should be accompanied by rigorous model uncertainty analysis. However...
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A MODELING APPROACH FOR ESTIMATING WATERSHED IMPERVIOUS SURFACE AREA FROM NATIONAL LAND COVER DATA 92 |
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We used National Land Cover Data 92 (NLCD92), vector impervious surface data, and raster GIS overlay methods to derive impervious surface coefficients per NLCD92 class in portions ...
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A MULTIDISCIPLINARY APPROACH TO MANAGING STORMWATER RUNOFF IN AN URBAN WATERSHED |
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Increased impervious surface (e.g., roofs, pavement) due to urbanization can lead to excess runoff throughout a watershed, overwhelming the existing stormwater infrastructure. High...
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A MULTIDISCIPLINARY APPROACH TO STORMWATER MANAGEMENT AT THE WATERSHED SCALE. |
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Stormwater runoff from extensive impervious surfaces in urban and suburban areas has led to human safety risks and stream ecosystem impairment, triggering an interest in watershed-...
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A MULTIDISCIPLINARY APPROACH TO STORMWATER MANAGEMENT AT THE catchment SCALE |
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Stormwater runoff from extensive impervious surfaces in urban and suburban areas has led to human safety risks and stream ecosystem impairment, triggering an interest in catchment-...
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A PREDICTIVE MODEL FOR ANTI-DEGRADATION MONITORING OF THE DELAWARE RIVER |
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The non-tidal portion of the Delaware River consists of many large sections designated as Wild and Scenic Rivers and passes through two national parks. Although there is increasing...
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A PROBABILISTIC APPROACH FOR ANALYSIS OF UNCERTAINTY IN EVALUATION OF WATERSHED MANAGEMENT PRACTICES |
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A computational framework is presented for analyzing uncertainty in model estimates of water quality benefits of best management practices (BMPs) in two small <10 km2 |
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A PROTOCOL FOR DETERMINING WWF SETTLING VELOCITIES FOR TREATMENT PROCESS DESIGN ENHANCEMENT |
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Urban wet weather flows (WWF) contain a high proportion of suspended solids (SS) which must be rapidly reduced before release to receiving waters. Site specific, storm-event dat...
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A QUANTITATIVE ASSESSMENT OF A COMBINED SPECTRAL AND GIS RULE-BASED LAND-COVER CLASSIFICATION IN THE NEUSE RIVER BASIN OF NORTH CAROLINA |
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The 14,582 km2 Neuse River Basin in North Carolina was characterized based on a user defined land-cover (LC) classification system developed specifically to support spatially expli...
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A REFERENCED-BASED FRAMEWORK FOR EVALUATING THE ECOLOGICAL CONDITION OF STREAM NETWORKS IN SMALL WATERSHEDS |
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Nine field indicators were identified for evaluating the hydrologic, biogeochemical, and/or habitat functioning of stream channels, riparian zones, or both. We ranked condition fro...
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A REGIONAL ECOLOGICAL ANALYSIS OF THE GREAT LAKES BASIN |
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The U.S. Environmental Protection Agency (EPA) and Natural Resources Canada: Canada Centre for Remote Sensing (CCRS) are conducting a cooperative research landscape ecological stud...
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A REVIEW OF AQUATIC HABITAT ASSESSMENT METHODS |
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Approximately 30 aquatic habitat assessment techniques were summarized and compared to provide information to watershed and nonpoint pollution control managers. Most methods have b...
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A SIMPLE HYDROLOGICAL MODEL FOR WATERSHED CHARACTERIZATION |
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Catchment behavior is characterized with a variety of metrics - discharge, chemical export, biological activity, to name a few. Catchments have complex temporal behavior, e.g., su...
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A SMALL WATERSHED CHARACTERIZATION, CLASSIFICATION, AND ASSESSMENT FOR WEST VIRGINIA UTILIZING EMAP DESIGN AND TOOLS |
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A multi-objective sampling design has been implemented through R-EMAP support of a cooperative agreement with the state of West Virginia. Goals of the project include: 1) developme...
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A SPATIALLY-EXPLICIT WATERSHED MODEL FOR REGIONAL ANALYSIS OF DISSOLVED ORGANIC CARBON IN LAKES. (R826762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A STRATEGY FOR INTEGRATED ECOLOGICAL RESTORATION OF RIPARIAN BUFFERS IN THE MID-ATLANTIC REGION |
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Increased sediments, nutrients, and other contaminants in the Mid-Atlantic region contribute to environmental problems ranging from stream degradation to possibly Pfiesteria attack...
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A STREAM SYSTEMS EVALUATION - AN EMPHASIS ON SPAWNING HABITAT FOR SALMONIDS |
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As a result of silvicultural activities in the Pacific Northwest, various levels of sediments and debris enter the streams, often degrading spawning substrate of salmonid fishes. S...
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A STRESS FUNCTION FOR EVALUATING STRATEGIES FOR WATER QUALITY MANAGEMENT |
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This investigation explored the relationship between biological communities and the physical and chemical conditions in the aquatic environment. Seasonal patterns and the duration ...
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A SUB-PIXEL ACCURACY ASSESSMENT FRAMEWORK FOR DETERMINING LANDSAT TM DERIVED IMPERVIOUS SURFACE ESTIMATES. |
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The amount of impervious surface in a watershed is a landscape indicator integrating a number of concurrent interactions that influence a watershed's hydrology. Remote sensing data...
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A SYSTEMIC APPROACH TO MITIGATING URBAN STORM WATER RUNOFF VIA DEVELOPMENT PLANS BASED ON LAND SUITABILITY ANALYSIS |
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We advocate an approach to reduce the anticipated increase in stormwater runoff from conventional development by demonstrating a low-impact development that incorporates hydrologic...
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A Streamlined Monitoring Framework for Low Impact Development Stormwater Management Practices - Albuquerque |
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In many respects, the collection, of monitoring data has become standard "boilerplate" in grant proposals that fund non point source management projects. This approach typically ca...
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A Streamlined Monitoring Framework for Low Impact Development Stormwater Management Practices - Cleveland |
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Suburban development surrounding extant urban cores provides watershed managers with two distinct scenarios. The first is abandonment of urban residential zones and problems associ...
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A Streamlined Monitoring Framework for Sustainable and Low Impact Development Stormwater Management Practices - 2 |
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The problems of urbanization and stormwater management, as they pertain to monitoring the condition of water and environmental resources, are grounded in issues of scale, connectiv...
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A TECHNIQUE FOR ASSESSING THE ACCURACY OF SUB-PIXEL IMPERVIOUS SURFACE ESTIMATES DERIVED FROM LANDSAT TM IMAGERY |
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We developed a technique for assessing the accuracy of sub-pixel derived estimates of impervious surface extracted from LANDSAT TM imagery. We utilized spatially coincident
sub...
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A TEN-YEAR WATER BALANCE OF A MOUNTAINOUS SEMI-ARID WATERSHED. (R824784) |
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Quantifying water balance components, which is particularly challenging in snow-fed, semi-arid regions, is crucial to understanding the basic hydrology of a watershed. In this stud...
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A TEST OF WATERSHED CLASSIFICATION SYSTEMS FOR ECOLOGICAL RISK ASSESSMENT |
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To facilitate extrapolation among watersheds, ecological risk assessments should be based on a model of underlying factors influencing watershed response, particularly vulnerabilit...
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A UNIFORM VERSUS AN AGGREGATED WATER BALANCE OF A SEMI-ARID WATERSHED. (R824784) |
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Hydrologists have long struggled with the problem of how to account for the effects of spatial variability in precipitation, vegetation and soils. This problem is particularly acut...
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A WATERSHED APPROACH TO DRINKING WATER QUALITY |
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The purpose of this presentation is to describe emerging technologies and strategies managing watersheds with the goal of protecting drinking water sources. Included are discussio...
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A WATERSHED APPROACH TO UNDERSTANDING ANTHROPOGENIC INFLUENCES ON STREAMS AND THEIR RECEIVING SALT MARSHES |
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Fresh and saltwater ecosystems have customarily been assessed separately. By taking a watershed approach, we are exploring the linkages between stream conditions, the biotic integr...
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A WATERSHED-LEVEL APPROACH TO STUDY THE PUTATIVE RELATIONSHIPS BETWEEN LANDUSE CHANGE AND SURFACE WATER FLOW ALTERATION |
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Inter-generationally prudent management of watershed resources will require attention to the interdependence between shifting landuse distributions and their effects on watershed h...
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A WATERSHED-SCALE MODEL FOR PREDICTING NON-POINT POLLUTION RISK IN NORTH CAROLINA. (R828784) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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A predictive model for anti-degradation monitoring of the Delaware River mainstem |
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The non-tidal portion of the Delaware River can be considered to be in minimally disturbed condition, but there is increasing pressure on the watershed. Thus, the primary goal of ...
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ACCURACY ASSESSMENT OF THE NATIONAL LAND COVER DATABASE 2001 (NLCD 2001) IMPERVIOUSNESS DATA |
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Landscape conditions of watersheds strongly influence the sustainability of aquatic resources valued by society, including quality of drinking water, diversity of stream life, and ...
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ACID DEPOSITION AND WATERSHED CHARACTERISTICS IN RELATION TO LAKE CHEMISTRY IN NORTHEASTERN MINNESOTA |
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The relationship between lake sensitivity to atmospheric acidic inputs and the neutralization capacity of watersheds is examined for 267 lakes in northeastern Minnesota. Three wate...
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ACIDIFICATION AND RECOVERY OF A SPODOSOL BS HORIZON FROM ACIDIC DEPOSITION |
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A laboratory study was conducted to examine acidification and recovery of a Spodosol Bs horizon from acidic deposition in the Bear Brook Watershed (BBW) in central Maine. echanical...
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ACIDIFICATION TRENDS AND THE EVOLUTION OF NEUTRALIZATION MECHANISMS THROUGH TIME AT THE BEAR BROOK WATERSHED IN MAINE (BBWM), U.S.A. |
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The paired catchment study at the forested Bear Brook Watershed in Maine (BBWM) U.S.A. documents interactions among short- to long-term processes of acidification. In 1987-1989, ru...
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ADAPTATION OPPORTUNITIES FOR SURFACE WATER RESOURCES IN THE ROARING FORK WATERSHED, COLORADO. |
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This project will assess climate-related impacts to the Roring Fork River (near Aspen, Colorado) and identify adaptive opportunities for surface water users, to support a larger gl...
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ADDING GLOBAL SOILS DATA TO THE AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT TOOL (AGWA) |
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The Automated Geospatial Watershed Assessment Tool (AGWA) is a GIS-based hydrologic modeling tool that is available as an extension for ArcView 3.x from the USDA-ARS Southwest Wate...
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ADJUSTING MEASURED PEAK DISCHARGES FROM AN URBANIZING WATERSHED TO REFLECT A STATIONARY LAND USE SIGNAL. (R828012) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ADOPTING THE PROBLEM BASED LEARNING APPROACH IN A GIS PROJECT MANAGEMENT CLASS |
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Problem Based Learning (PBL) is a process that emphasizes the need for developing problem solving skills through hands-on project formulation and management. A class adopting the ...
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ADOPTION OF NUTRIENT MANAGEMENT TECHNIQUES TO REDUCE HYPOXIA IN THE GULF OF MEXICO. (R825761) |
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Data were collected from 1011 land owner-operators within three watersheds located in the North Central Region of the USA to examine use of selected water protection practices. ...
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ADULT COHO SALMON AND STEELHEAD USE OF BOULDER WEIRS IN SOUTHWEST OREGON STREAMS |
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The placement of log and boulder structures in streams is a common and often effective technique for improving juvenile salmonid rearing habitat and increasing fish densities. Less...
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ADULT EDUCATION AND WATERSHED KNOWLEDGE IN UPSTATE NEW YORK (R823466) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ADULT ENVIRONMENTAL KNOWLEDGE AND CONFIDENCE: IMPACTS OF A WATERSHED EDUCATION PROGRAM (R823466) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ADVANCING EPA WETLAND SCIENCE: DEVELOPING TOOLS FOR QUANTITATIVE ASSESSMENT OF WETLAND FUNCTION AND CONDITION AT THE REGIONAL LEVEL |
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The EPA Office of Water has recognized a critical need for tribes, states and federal agencies to be able to quantitatively assess the condition of the nations wetland resources. ...
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AGRICULTURE RUNOFF AND RESERVOIR DRAWDOWN EFFECTS ON A 2760-HECTARE RESERVOIR |
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The 2760-hectare Big Eau Pleine Reservoir in Marathon County, Wisconsin has experienced frequent winter fish kills and summer algae blooms since its construction in 1937. A study o...
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AGWA DESIGN DOCUMENTATION: MIGRATING TO ARCGIS AND THE INTERNET |
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Rapid post-fire watershed assessment to identify potential trouble spots for erosion and flooding can potentially aid land managers and Burned Area Emergency Rehabilitation (BAER) ...
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AIR LAND WATER ANALYSIS SYSTEM (ALEAS): A MULTI-MEDIA MODEL FOR TOXIC SUBSTANCES |
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The Air Land Water Analysis System (ALWAS) is a multi-media environmental model for describing the atmospheric dispersion of toxicants, the surface runoff of deposited toxicants, a...
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AIR POLLUTION EFFECTS ON AQUATIC ECOSYSTEMS: SUMMARY OF A SYMPOSIUM |
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Summarizing presentations at a symposium on air pollutant effects on aquatic ecosystems, this document includes an overview of U.S. research programs, atmospheric emissions and dep...
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AIRBORNE MERCURY DEPOSITION AND WATERSHED CHARACTERISTICS IN RELATION TO MERCURY CONCENTRATIONS IN WATER, SEDIMENTS, PLANKTON, AND FISH OF EIGHTY NORTHERN MINNESOTA LAKES |
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In light of increasing fish consumption advisories in several states, a comprehensive multimedia database was created to answer a variety of questions. Mercury concentrations in pr...
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AIRSHED DOMAINS FOR MODELING ATMOSPHERIC DEPOSITION OF OXIDIZED AND REDUCED NITROGEN TO THE NEUSE/PAMLICO SYSTEM OF NORTH CAROLINA |
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Atmospheric deposition is important to nutrient loadings to coastal estuaries. Atmospheric emissions of nitrogen travel hundreds of kilometers as they are removed via atmospheric...
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ALGAL RESPONSES TO NUTRIENT LOADING IN GREAT LAKES COASTAL WETLANDS |
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We are evaluating the influence of nutrient loading on phytoplankton and periphyton in coastal wetlands of the Great Lakes as part of an EPA study associated with the Great Lakes E...
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ALIEN SPECIES IMPORTANTANCE IN NATIVE VEGETATION ALONG WADEABLE STREAMS, JOHN DAY RIVER BASIN, OREGON, USA |
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We evaluated the importance of alien species in existing vegetation along wadeable streams of a large, topographically diverse river basin in eastern Oregon, USA; sampling 165 plot...
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ALLOCATION OF MONITORING SITES FOR REGIONAL SURVEYS OF HYDROLOGIC UNITS |
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In order to characterize the ecological condition of Pacific Northwest watersheds and their aquatic ecosystems, interagency teams have developed the Aquatic and Riparian Effectiven...
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ALTERATIONS IN SEXUALLY DIMORPHIC BIOTRANSFORMATION OF TESTOSTERONE IN JUVENILE AMERICAN ALLIGATORS (ALLIGATOR MISSISSIPPIENSIS) FROM CONTAMINATED LAKES |
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The goal of this study was to determine whether hepatic biotransformation of testosterone is normally sexually dimorphic in juvenile alligators and whether living in a contaminated...
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ALTERED SOIL-SOIL WATER INTERACTION INFERRED FROM STREAM WATER CHEMISTRY AT AN ARTIFICIALLY ACIDIFIED WATERSHED AT BEAR BROOK WATERSHED, MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ALTERED SOIL-SOIL WATER INTERACTIONS INFERRED FROM STREAMWATER CHEMISTRY AT AN ARTIFICALLY ACIDIFIED WATERSHED AT BEAR BROOK WATERSHED, MAINE USA. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ALTERNATAIVE FUTURES ANALYSIS: INCORPORATING SCIENCE INTO LANDSCAPE PLANNING TO INFORM COMMUNITY DECISION-MAKING |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ALTERNATIVE FUTURES ANALYSIS FOR WILLAMETTE BASIN, OREGON |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ALTERNATIVE FUTURES ANALYSIS IN THE WILLAMETTE BASIN, OREGON |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ALTERNATIVE POLICIES FOR CONTROLLING NONPOINT AGRICULTURAL SOURCES OF WATER POLLUTION |
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This study of policies for controlling water pollution from nonpoint agricultural sources includes a survey of existing state and Federal programs, agencies, and laws directed to t...
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AN ACCURACY ASSESSMENT OF 1992 LANDSAT-MSS DERIVED LAND COVER FOR THE UPPER SAN PEDRO WATERSHED (U.S./MEXICO) |
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The utility of Digital Orthophoto Quads (DOQS) in assessing the classification accuracy of land cover derived from Landsat MSS data was investigated. Initially, the suitability of ...
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AN ACCURACY ASSESSMENT OF 1997 LANDSAT THEMATIC MAPPER DERIVED LAND COVER FOR THE UPPER SAN PEDRO WATERSHED (U.S./MEXICO) |
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High-Resolution airborne color video data were used to evaluate the accuracy of a land cover map of the upper San Pedro River watershed, derived from June 1997 Landsat Thematic Map...
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AN ACCURACY ASSESSMENT OF MULTIPLE MID-ATLANTIC SUB-PIXEL IMPERVIOUS SURFACE MAPS |
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Anthropogenic impervious surfaces have an important relationship with non-point source pollution (NPS) in urban watersheds. The amount of impervious surface area in a watershed is...
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AN APPLICATION OF GIS BASED NONPOINT SOURCE MODELING TO LITTLE MIAMI RIVER BASIN: PRACTICE AND EXPERIENCE USING BASINS |
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Water quality has improved significantly in the Little Miami River Basin, OH, over the past few decades because of improvements in the treatment of municipal and industrial wastes....
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AN APPROACH TO IDENTIFY AND SELECT APPROPRIATE BMPS FOR SOURCE WATER PROTECTION: A CASE STUDY IN COLUMBUS, OH |
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Nonpoint source pollution is the leading cause of impairment to our nations water resources. Both drinking and wastewater utilities are challenged to comply with existing and propo...
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AN ARCGIS TOOL FOR CREATING POPULATIONS OF WATERSHEDS |
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For the Landscape Investigations for Pesticides Study in the Midwest, the goal is to sample a representative subset of watersheds selected statistically from a target population of...
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AN ECOLOGICAL AND HABITAT VULNERABILITY ASSESSMENT OF ARKANSAS WHITE RIVER BASIN |
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This study is an important first step toward a determination of how such landscape alterations are correlated with changes in the hydrologic, chemical, and biological characteristi...
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AN ECOLOGICAL AND HABITAT VULNERABILITY ASSESSMENT OF THE WHITE RIVER BASIN |
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This study is an important first step toward a determination of how such landscape alterations are correlated with changes in the hydrologic, chemical, and biological characteristi...
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AN ECOSYSTEM MODEL OF A RIVER-DOMINATED PACIFIC NORTHWEST ESTUARY: ROLES OF SALT MARSH-, RIVER- AND OCEAN-DERIVED MATERIALS |
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The Salmon River estuary on the central Oregon coast is river-dominated, with hydraulic residence times ranging from <1 day during winter high flows to a week during low flows. Th...
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AN ECOSYSTEM MODEL OF A RIVER-DOMINATED PACIFIC NORTHWEST ESTURARY: ROLES OF SALT MARSH-, RIVER-, AND OCEAN-DERIVED MATERIALS |
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The Salmon River estuary on the central Oregon coast is river-dominated, with hydraulic residence times ranging from <1 day during winter high flows to a week during low flows. Th...
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AN EIGHT-STEP FRAMEWORK FOR EFFECTIVE AGRICULTURAL WATERSHED MANAGEMENT. (R825290) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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AN EVALUATION AND ANALYSIS OF THREE DYNAMIC WATERSHED ACIDIFICATION CODES (MAGIC, ETD, AND ILWAS) |
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The U.S. Environmental Protection Agency is currently using the dynamic watershed acidification codes MAGIC, ILWAS, and ETD to assess the potential future impact of acidic depositi...
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AN EVALUATION AND COST-OPTIMIZATION TOOL FOR PLACEMENT OF BMPS |
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To assist stormwater management professionals in planning for best management practices (BMPs) implementation, the U.S. Environmental Protection Agency (USEPA) is developing a deci...
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AN EVALUATION OF 25 YEARS OF LANDSCAPE CHANGE IN A SOUTHWEST WATERSHED |
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Vegetation change in the American West has been a subject of concern throughout the twentieth century. Although many of the changes have been recorded qualitatively through the use...
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AN EVALUATION OF HYDROLOGIC RESPONSE TO 25 YEARS OF LANDSCAPE CHANGE IN A SEMI-ARID WATERSHED |
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The assessment of land use and land cover is an extremely important activity for contemporary land management. A large body of current literature suggests that human land-use p...
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AN EVALUATION OF STREAM RESTORATION EFFECTIVENESS IN AN URBAN WATERSHED |
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The USEPA ORD Ground Water and Ecosystems Restoration Division has been conducting a before and after stream restoration evaluation of Mine Bank Run, a highly degraded stream in an...
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AN EVALUATION OF THE INDIVIDUAL COMPONENTS AND ACCURACIES ASSOCIATED WITH THE DETERMINATION OF IMPERVIOUS AREA |
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The percentage of impervious surface area in a watershed has been widely recognized as a key indicator of terrestrial and aquatic ecosystem condition. Although the use of the imper...
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AN EVALUATION OF THREE PESTICIDE RUNOFF LOADING MODELS |
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Three nonpoint source runoff models were tested and compared for their abilities to predict the movement of the pesticides toxaphene and atrazine (2-chloro-4-(ethylamino)-6-(isopro...
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AN INTEGRATED COASTAL-WATERSHED MONITORING FRAMEWORK FOR ASSESSMENT |
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An approach for watershed classification in support of assessments, disgnosis of biological impairment, and prioritization of watershed restorations has been tested in coastal wate...
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AN INTEGRATED FRAMEWORK FOR WATERSHED ASSESSMENT AND MANAGEMENT |
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Watershed approaches to water quality management have become popular, because they can address multiple point and non-point sources and the influences of land use. Developing techn...
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AN INTEGRATED LANDSCAPE AND HYDROLOGICAL ASSESSMENT FOR THE YANTRA RIVER BASIN, BULGARIA |
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Geospatial data and relationships derived there from are the cornerstone of the landscape sciences. This information is also of fundamental importance in deriving parameter inputs...
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AN INTEGRATED WATERSHED APPROACH LINKING SALMONID PRODUCTIVITY TO FRESHWATER HABITAT |
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EPA's Western Ecology Division is undertaking research addressing catchment-scale dynamics of freshwater habitat productivity for native fishes. Through partnerships with state and...
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AN INTEGRATIVE WATERSHED MODELING FRAMEWORK (IWMF) FOR ECOSYSTEM SUSTAINABILITY ASSESSMENT AT THE WATERSHED SCALE |
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The public's right to continued access and use of ecosystem services requires an evaluation of the environmental risks that are associated with activities such as urban development...
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AN INTERDISCIPLINARY APPROACH TO RIPARIAN MEADOW CHARACTERIZATION AND PRIORITIZATION, CENTRAL GREAT BASIN |
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The Great Basin Ecosystem Management Research group has described the hydrological, geophysical, and geomorphic conditions that lead to the formation and maintenance of riparian me...
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AN INTERDISCIPLINARY APPROACH TO VALUING WATER FROM BRUSH CONTROL |
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An analytical methodology utilizing models from three disciplines is developed to assess the viability of brush control for wate yield in the Frio River Basin, TX. Ecological, hydr...
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AN INTERDISCIPLINARY APPROACH TO VALUING WATER FROM BRUSH CONTROL: JOURNAL ARTICLE |
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NRMRL-CIN-1652 Lemberg**, B., Mjelde, J.W., Connor, R., Griffin, R.C., Rosenthal, W.D., and Stuth, J.W. An Interdisciplinary Approach to Valuing Water from Brush Control. Journal...
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AN INTERREGIONAL COMPARISON OF CHANNEL STRUCTURE, TRANSIENT STORAGE AND NUTRIENT UPTAKE IN STREAMS DRAINING MANAGED AND OLD GROWTH WATERSHEDS |
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We compared stream channel structure (width, depth, substrate composition) and riparian canopy with transient storage and nutrient uptake in 32 streams draining old-growth and mana...
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AN INVESTIGATION OF MERCURY LEVELS IN THE FOOD WEB OF ISLE ROYALE NATIONAL PARK, MICHIGAN: REPORT FOR THE AQUATIC SUBPROJECT, SARGENT AND RICHIE LAKES, SUMMER 1998-99 |
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Toxic contaminants are one of the most pressing environmental concerns in the Lake Superior Basin. The "Binational Program to Protect and Restore the Lake Superior Basin," a U.S. a...
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AN OVERVIEW OF THE STRATEGIC CONTENT OF EPA'S WATERSHED RESEARCH PROGRAM |
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The Environmental Protection Agency (EPA) has directed much attention to watersheds and water quality during its tenure as the United States Federal Agency charged with protection ...
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AN OVERVIEW OF THE USE OF QSARS FOR RANKING AND PRIORITIZING LARGE CHEMICAL INVENTORIES FOR ENVIRONMENTAL RISK ASSESSMENT |
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Ecological risk assessments for chemical stressors are used to establish linkages between likely exposure concentrations and adverse effects to ecological receptors. At times, it i...
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ANALYSIS OF LANDSCAPE AND WATER QUALITY IN THE NEW YORK CATSKILL - DELAWARE WATERSHED (1973-1998) |
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The primary goal of this study is to improve risk assessment through the development of methods and tools for characterization of landscape and water resource change. Exploring the...
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ANALYSIS OF LANDSCAPE AND WATER QUALITY IN THE NEW YORK CATSKILL-DELAWARE WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ANALYTICAL METHODS MANUAL FOR THE DIRECT/DELAYED RESPONSE PROJECT SOIL SURVEY |
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The U.S. Environmental Protection Agency, in conjunction with the National Acid Precipitation Assessment Program, has designed and implemented a research program to predict the lon...
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ANALYTICAL TOOLS INTERFACE FOR LANDSCAPE ASSESSMENTS (ATTILA) ARCVIEW EXTENTION |
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Geographic Information Systems (GIS) have become a powerful tool in the field of landscape ecology. A common application of GIS is the generation of landscape metrics, which are qu...
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ANALYZING CORRELATIONS BETWEEN STREAM AND WATERSHED ATTRIBUTES |
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Bivariate correlation analysis has been widely used to explore relationships between stream and watershed attributes that have all been measured on the same set of watersheds or sa...
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ANALYZING HYDROLOGICAL CONSEQUENCES OF A FUTURE ENVIRONMENT: SCENARIO ANALYSIS FOR THE SAN PEDRO RIVER |
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Studies of future management and policy options based on different assumptions provide a mechanism to examine possible outcomes and especially their likely benefits and consequence...
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ANALYZING THE CONSEQUENCES OF ENVIRONMENTAL SPATIAL PATTERNS ON ENVIRONMENTAL RESOURCES: THE USE OF LANDSCAPE METRICS GENERATED FROM REMOTE SENSING DATA |
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A number of existing and new remote sensing data provide images of areas ranging from small communities to continents. These images provide views on a wide range of physical featu...
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ANTHROPOGENIC COPPER INVENTORIES AND MERCURY PROFILES FROM LAKE SUPERIOR: EVIDENCE FOR MINING IMPACTS |
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During the past 150 years, the mining indstry discharged more than a billion tons of tailings along Lake Superior shorelines and constructed numerous smelters in the watershed. Giv...
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ANTHROPOGENIC INFLUENCES ON STREAMS AND THEIR RECEIVING SALT MARSHES |
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Land use and anthropogenic activities in watersheds affect biological, chemical, and physical conditions in streams and receiving coastal salt marshes. Our objective is to compare ...
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APPARENT 85KRYPTON AGES OF GROUNDWATER WITHIN THE ROYAL WATERSHED, MAINE, USA |
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85Kr activities were determined in 264 domestic and municipal wells from 2002-2004 in the Royal watershed (361 km2), Maine. Gas extraction for 85Kr...
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APPLICATION OF A MULTIPURPOSE UNEQUAL-PROBABILITY STREAM SURVEY IN THE MID-ATLANTIC COASTAL PLAIN |
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A stratified random sample with unequal-probability selection was used to design a multipurpose survey of headwater streams in the Mid-Atlantic Coastal Plain. Objectives for data f...
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APPLICATION OF A SUBGRID OROGRAPHIC PRECIPITATION/SURFACE HYDROLOGY SCHEME TO A MOUNTAIN WATERSHED. (R824803) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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APPLICATION OF A WATERSHED NITROGEN LOADING MODEL FORTY-NINE (49) MEDIUM SIZED SOUTHERN NEW ENGLAND EMBAYMENT TYPE ESTUARIES |
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Platform presentation at a scientific conference...
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APPLICATION OF CONTINUOUS WATERSHED MODELLING TO FEEDLOT RUNOFF MANAGEMENT AND CONTROL |
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A continuous simulation, digital computer, hydrologic model of feedlot runoff generation and disposal has been developed at Kansas State University. The purpose of the model is to ...
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APPLICATION OF GENOMIC AND PROTEOMIC INDICATORS TO CHARACTERIZE EXPOSURE OF AQUATIC ORGANISMS TO ENVIRONMENTAL CONTAMINANTS |
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Advances in molecular biological methods are continually being brought to bear on human health research, from a basic understanding of systems biology to identification of toxicity...
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APPLICATION OF LAND-COVER DATA FOR ENVIRONMENTAL ASSESSMENTS |
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In many parts of the United States, urbanization is a pervasive dynamic that has many environmental consequences. Land-cover and related (e.g. Landsat) data are fundamental for stu...
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APPLICATION OF MARKET MECHANISMS AND INCENTIVES TO REDUCE STORMWATER RUNOFF. AN INTEGRATED HYDROLOGIC, ECONOMIC AND LEGAL APPROACH. |
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Increased stormwater flows are a direct result of urbanization and the consequent increase in the proportion of land area under impervious surface. Due to its contribution to abnor...
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APPLICATION OF THE ECOTONE CONCEPT IN DEFINING NUTRIENT MANAGEMENT REQUIREMENTS FOR THE UPPER POTOMAC RIVER BASIN |
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The utility of the ecotone concept in nutrient management studies of the Potomac River basin, a large USA watershed, is examined. he MAB hypothesis suggesting that the influence of...
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APPLICATION OF THE HSPF MODEL TO THE SOUTH FORK OF THE BROAD RIVER WATERSHED IN NORTHEASTERN GEORGIA |
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The Hydrological Simulation Program-Fortran (HSPF) is a comprehensive watershed model which simulates hydrology and water quality at user-specified temporal and spatial scales. Wel...
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APPLICATION OF THE SYNOPTIC APPROACH TO WETLAND DESIGNATION: A CASE STUDY IN WASHINGTON |
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The synoptic approach is a rapid assessment method designed to provide a context for evaluating landscape sensitivity to cumulative wetland loss and to complement site specific inf...
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APPLICATION OF WATER QUALITY MODELS TO A SMALL FORESTED WATERSHED: I. THE NONDESIGNATED 208 AREA SCREENING MODEL |
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The natural setting of a small forested watershed, the West Point Study Area, is described. Modeling of the watershed using the nondesignated 208 area screening model is explained....
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APPLICATION OF WATERSHED ECOLOGICAL RISK ASSESSMENT METHODS TO WATERSHED MANAGEMENT |
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Watersheds are frequently used to study and manage environmental resources because hydrologic boundaries define the flow of contaminants and other stressors. Ecological assessment...
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APPLICATIONS OF AUTOMATED BIOMONITORING FOR WATERSHED MANAGEMENT |
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Over three decades of progress have been made since John Cairns and his associates first coined a new scientific endeavor known as automated biomonitoring. Implementations have ran...
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APPLICATIONS OF ENVIRONMENTAL ISOTOPES FOR WATERSHED INVESTIGATIONS |
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Environmental isotopes include naturally-occurring nuclides that can be applied as tracers within watersheds (Sidle, 1998). Recent advances in mass spectroscopy may supplant many t...
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APPLYING ECOLOGICAL RISK PRINCIPLES TO WATERSHED ASSESSMENT AND MANAGEMENT |
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Considerable progress in addressing point source (end of pipe) pollution problems has been made but it is now recognized that further substantial environmental improvements depend ...
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APPLYING THE CLEAN WATER ACT SO THAT WE FIX THE RIGHT THINGS |
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Determining the cause of a biological impairment can be a daunting task, one that is complicated by multiple possible causes, spotty or irregularly collected data, natural variatio...
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APPLYING THE PATUXENT LANDSCAPE UNIT MODEL TO HUMAN DOMINATED ECOSYSTEMS: THE CASE OF AGRICULTURE. (R827169) |
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Non-spatial dynamics are core to landscape simulations. Unit models simulate system interactions aggregated within one space unit of resolution used within a spatial model. For ...
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APPROACH TO "FURTHER-REASONABLE-PROGRESS" TO ATTAIN WATER QUALITY STANDARDS |
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Watershed managers in urban areas in the US are pursuing optimum strategies or plans for managing wastewater treatment plants, stormwater systems, sanitary sewer overflows (SSO) an...
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APPROACH TO "FURTHER-REASONABLE-PROGRESS" TO ATTAIN WATER QUALITY STANDARDS |
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Watershed managers in urban areas in the US are pursuing optimum strategies or plans for managing wastewater treatment plants, stormwater systems, sanitary sewer overflows (SSO) an...
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AQUATIC ECOSYSTEM PROTECTION AND FISHERIES MANAGEMENT IN THE MID-ATLANTIC HIGHLANDS (USA) USING WHAT IF: A COLLABORATION OF THE CANAAN VALLEY INSTITUTE, THE OFFICE OF RESEARCH AND DEVELOPMENT AND REGION III |
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As described in its Highlands Action Program, the Canaan Valley Institute (CVI) partnered with the US EPA to develop a watershed assessment and management tool that allows managers...
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AQUATIC ECOSYSTEMS, |
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Aquatic ecosystems are a vital part of the urban water cycle (and of urban areas more broadly), and, if healthy, provide a range of goods and services valued by humans (Meyer 1997)...
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AQUATIC VERTEBRATE ASSEMBLAGES AT LEAST- AND MOST-IMPACTED STREAM AND RIVER SITES IN THE WESTERN FORESTED MOUNTAINS AGGREGATE ECOREGIONS |
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In the West, development of indicators of aquatic vertebrate assemblages condition in streams and rivers is challenged by low species richness (often < 3 species), by strong natura...
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ARE AIRBORNE CONTAMINANTS A RISK FACTOR TO AQUATIC ECOSYSTEMS IN REMOTE WESTERN NATIONAL PARKS (USA) |
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The Western Airborne Contaminants Assessment Project (WACAP) was initiated in 2002 by the National Park Service to determine if airborne contaminants were having an impact on remot...
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ARE INVASIVE RIPARIAN PLANTS ASSOCIATED WITH REDUCED BIOTIC CONDITION OF FAUNA IN WESTERN US STREAMS? |
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Yes. Records on the presence or absence of 12 invasive riparian plant taxa and observations on macroinvertebrate and vertebrate communities within streams were collected at over 10...
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ARSENIC GEOCHEMICAL BEHAVIOR DURING GROUND WATER-SURFACE WATER INTERACTIONS AT A CONTAMINATED SITE |
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Research results will be presented that address arsenic mobilization and cycling mechanisms at a Superfund site in eastern Massachusetts. The site is located in the headwaters of t...
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ASSEMBLING DEM FILES FOR WATERSHED ANALYSIS. (R826595) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ASSESSING AND MANAGING MERCURY FROM HISTORIC AND CURRENT MINING ACTIVITIES |
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Mining activities in the US (not counting coal) produce between one and two billion tons of mine waste annually. Since many of the ore mines involve sulfide minerals, the productio...
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ASSESSING ARID RIPARIAN LANDSCAPES USING REMOTE SENSING: THE FIRST STEP |
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Riparian ecosystems are of great value in the Southwest yet they are also extremely fragile and susceptible to natural and anthropogenic disturbances. Riparian ecosystems establis...
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ASSESSING CHANGES IN WATERSHED FLOW REGIMES WITH SPATIALLY EXPLICIT HYDRAULIC MODELS. (R825760) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ASSESSING ECOLOGICAL RISK IN WATERSHEDS: A CASE STUDY OF PROBLEM FORMULATION IN THE BIG DARBY CREEK WATERSHED, OHIO, USA |
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The Big Darby Creek watershed, a highly valued ecosystem in central Ohio, USA, threatened by intensive agriculture and suburban encroachment, served as an example of how case speci...
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ASSESSING HABITAT SUITABILITY AT MULTIPLE SCALES: A LANDSCAPE-LEVEL APPROACH |
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The distribution and abundance of many plants and animals are influenced by the
spatial arrangement of suitable habitats across landscapes. We derived habitat
maps from a digital l...
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ASSESSING NEW ENGLAND COASTAL WETLANDS USING A 3-TIERED REFERENCE-BASED APPROACH |
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platform presentation at a scientific meeting...
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ASSESSING NEW ENGLAND COASTAL WETLANDS USING A SYSTEMATIC REFERENCE-BASED APPROACH |
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The US Environmental Protection Agency, Atlantic Ecology Division is working collaboratively with Massachusetts Coastal Zone Management to implement landscape and rapid assessments...
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ASSESSING NITROGEN SOURCES IN LAKES WITH MUSSEL STABLE ISOTOPE RATIOS |
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Despite progress made in the past several decades towards limiting nutrient inputs, human-induced eutrophication in lakes, ponds, and reservoirs continues to be of concern. Althoug...
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ASSESSING NON-POINT SOURCES OF NITROGEN TO SMALL STREAMS IN THE SOUTH FORK BROAD RIVER WATERSHED (GEORGIA, USA) |
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The National Land Cover Data (NLCD) is a land cover classification derived from Landsat Thematic Mapper satellite data collected in the early to mid-1990s. In this work, land use c...
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ASSESSING SOUTHERN NEW ENGLAND COASTAL WETLANDS USING A THREE-TIERED, REFERENCE-BASED APPROACH |
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poster presentation at a scientific meeting...
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ASSESSING STREAM BED STABILITY AND EXCESS SEDIMENTATION IN MOUNTAIN STREAMS |
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Land use and resource exploitation in headwaters catchments?such as logging, mining, and road building?often increase sediment supply to streams, potentially causing excess sedimen...
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ASSESSING THE ACCURACY OF NATIONAL LAND COVER DATASET AREA ESTIMATES AT MULTIPLE SPATIAL EXTENTS |
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Site specific accuracy assessments provide fine-scale evaluation of the thematic accuracy of land use/land cover (LULC) datasets; however, they provide little insight into LULC acc...
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ASSESSING THE ACCURACY OF SATELLITE-DERIVED LAND COVER CLASSIFICATION USING HISTORICAL AERIAL PHOTOGRAPHY DIGITAL ORTHOPHOTO QUADRANGLES, AND AIRBORNE VIDEO DATA |
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As the rapidly growing archives of satellite remote sensing imagery now span decades'worth of data, there is increasing interest in the study of long-term regional land cover chang...
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ASSESSING THE ACCURACY OF SATELLITE-DERIVED LAND COVER CLASSIFICATION USING HISTORICAL AERIAL PHOTOGRAPHY, DIGITAL ORTHOPHOTO QUADDRANGLES, AND AIRBORNE VIDEO DATA |
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As the rapidly growing archives of satellite remote sensing imagery now span decades'worth of data, there is increasing interest in the study of long-term regional land cover chang...
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ASSESSING THE ACCURACY OF SATELLITE-DERIVED LAND COVER CLASSIFICATION USING HISTORICAL AERIAL PHOTOGRAPHY, DIGITAL ORTHOPHOTO QUADRANGLES, AND AIRBORNE VIDEO DATA |
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As the rapidly growing archives of satellite remote sensing imagery now span decades' worth of data, there is increasing interest in the study of long-term regional land cover chan...
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ASSESSING THE ECOLOGICAL CONDITION OF A COASTAL PLAIN WATERSHED USING A PROBABILISTIC SURVEY DESIGN |
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Using a probabilistic survey design, we assessed the ecological condition of the Florida (USA) portion of the Escambia River watershed using selected environmental and benthic macr...
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ASSESSING THE ECOLOGICAL CONDITION OF WETLANDS AT THE CATCHMENT SCALE |
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We describe an approach to assessing the ecological condition of two classes of wetlands in the Nanticoke River watershed, a subwatershed in the Chesapeake Bay drainage of North Am...
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ASSESSING THE EFFECTS OF HABITAT ALTERATION ON THE BAY SCALLOP, ARGOPECTEN IRRADIANS |
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The U.S. EPA's National Health and Environmental Effects Laboratory is evaluating approaches for protecting and restoring the ecological integrity of aquatic habitats, such as mari...
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ASSESSING THE IMPACT OF LANDUSE/LANDCOVER ON STREAM CHEMISTRY IN MARYLAND |
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Spatial and statistical analyses were conducted to investigate the relationships between stream chemistry (nitrate, sulfate, dissolved organic carbon, etc.), habitat and satellite-...
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ASSESSING THE PREDICTIVE CAPABILITY OF LANDSCAPE SAMPLING UNITS OF VARYING SCALE IN THE ANALYSIS OF ESTUARINE CONDITION |
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Landscape structure metrics are often used to predict water and sediment quality of lakes, streams, and estuaries; however, the sampling units used to generate the landscape metric...
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ASSESSING THE QUANTITY AND QUALITY OF DEPRESSIONAL WETLANDS IN THE REDWOOD RIVER WATERSHED UTILIZING A PROBABILISTIC SURVEY DESIGN |
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Located in southwestern Minnesota, the Redwood River watershed lies within an area of the Prairie Pothole Region where land use is predominantly a mixture of row crop and livestock...
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ASSESSING THE RELATIVE AND COMBINED IMPACTS OF FUTURE LAND-USE AND CLIMATE CHANGES ON NONPOINT SOURCE POLLUTION |
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In this paper, we discuss the potential water quality impacts of future land-use and climate changes. The Little Miami River Basin was used as a case study. It is a predominantly...
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ASSESSING THE RELIABILITY OF REGRESSION MODELS FOR USE IN DECISION MAKING |
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Can any ecological model be truly validated? Strictly speaking, the answer must be "No", because models are simplified sketches of reality, and there will always be some conditions...
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ASSESSING THE WATER QUALITY IMPACTS OF GLOBAL CLIMATE CHANGE IN SOUTHWESTERN OHIO, U.S.A |
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This paper uses a watershed-scale hydrologic model (Soil and Water Assessment Tool) to simulate the water quality impacts of future climate change in the Little Miami River (LMR) w...
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ASSESSING WATERSHED-SCALE, LONG-TERM HYDROLOGIC IMPACTS OF LAND-USE CHANGE USING A GIS-NPS MODEL. (R825871) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ASSESSMENT AND MANAGEMENT OF TOXICS IN THE WATERSHED |
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The demand for water is beginning to outstrip the available supply of water. The truly insidious insult to freshwater supplies comes from anthropogenic impacts that pollute freshw...
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ASSESSMENT AND MANAGEMENT OF WATERSHED MICROBIAL CONTAMINANTS |
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Numerous sources of infectious disease causing microorganisms exist in watersheds and can impact recreational and drinking water quality. Organisms of concern include bacteria, vir...
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ASSESSMENT OF BIOTIC INTEGRITY USING FISH COMMUNITIES |
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Man's activities have had profound, and usually negative, influences on freshwater fishes from the smallest streams to the largest rivers. Some negative effects are due to contamin...
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ASSESSMENT OF ENERGY RESOURCE DEVELOPMENT IMPACT ON WATER QUALITY: THE TONGUE AND POWDER RIVER BASINS |
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The primary objective of this report is to evaluate the existing water quality monitoring network in the Tongue and Powder River Basins and to recommend needed modifications to the...
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ASSESSMENT OF FECAL POLLUTION SOURCES IN PLUM CREEK WATERSHED USING BACTEROIDETES 16S RDNA-BASED ASSAYS |
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Recently, 16S rDNA Bacteroidetes-targeted PCR assays were developed to discriminate between ruminant and human fecal pollution. These assays are rapid and relatively inexp...
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ASSESSMENT OF FECAL POLLUTION SOURCES IN PLUM CREEK WATERSHED USING PCR AND PHYLOGENETIC ANALYSES OF BACTEROIDETES 16S RDNA |
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Traditional methods for assessing fecal pollution in environmental systems, such as monitoring for fecal coliforms are not capable of discriminating between different sources fecal...
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ASSESSMENT OF GENETIC DAMAGE INDICATORS IN FISH IN LABORATORY, MESOCOSM AND WATERSHED STUDIES |
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The micronucleus (MN) and single cell gel electrophoresis (SCG) ("Comet") techniques for measuring DNA damage are being evaluated for their potential use as indicators of exposure ...
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ASSESSMENT OF LAND USE CHANGE IMPACTS ON FLOW CHARACTERISTICS IN AN EASTERN PENNSYLVANIA WATERSHED |
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The impacts of changes in land use/cover due to urbanization on the hydrologic regime of the watershed have long been recognized and have been the subject of many studies. Distribu...
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ASSESSMENT OF OZONE EFFECTS ON NITRATE EXPORT FROM HUBBARD BROOK WATERSHED SIX. (R827958) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ASSESSMENT OF TWO PHYSICALLY BASED WATERSHED MODELS BASED ON THEIR PERFORMANCES OF SIMULATING SEDIMENT MOVEMENT OVER SMALL WATERSHEDS |
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Abstract: Two physically based and deterministic models, CASC2-D and KINEROS are evaluated and compared for their performances on modeling sediment movement on a small agricul...
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ASSESSMENT OF TWO PHYSICALLY-BASED WATERSHED MODELS BASED ON THEIR PERFORMANCES OF SIMULATING WATER AND SEDIMENT MOVEMENT |
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Two physically based watershed models, GSSHA and KINEROS-2 are evaluated and compared for their performances on modeling flow and sediment movement. Each model has a different wate...
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ASSESSMENT OF WETLAND CONDITION: AN EXAMPLE FROM THE UPPER JUNIATA WATERSHED IN PENNSYLVANIA, USA |
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abstract for presentation...
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ASSESSMENT OF WETLAND CONDITION: AN EXAMPLE FROM THE UPPER JUNIATA WATERSHED IN PENNSYLVANIA, USA |
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The requirement of Section 305(b) of the Clean Water Act (CWA) that all waters of the U.S. be assessed every two years has been historically ignored for wetlands, even though they ...
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ASSETS TO MOVE WATERSHED COUNCILS FROM ASSESSMENT TO ACTION. (R825751) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ASSETS TO MOVE WATERSHED COUNCILS FROM ASSESSMENT TO ACTION. (R827146) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ASSOCIATIONS AMONG WATERSHED- AND SITE-SCALE DISTURBANCES INDICATORS AND FISH ASSEMBLAGES AT LEAST- AND MOST-DISTURBED STREAM AND RIVER SITES IN WESTERN USA |
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At broad scales, the kinds and intensity of human disturbance to streams vary with natural gradients (e.g., elevation). While fish assemblages vary with both human and natural gra...
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AT THE INTERSECTION OF HYDROLOGY, ECONOMICS, AND LAW: APPLICATION OF MARKET MECHANISMS AND INCENTIVES TO REDUCE STORMWATER RUNOFF |
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Increased stormwater flows are a direct result of urbanization and the consequent increase in the proportion of land area under impervious surface. Due to its contribution to ...
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ATMOSPHERIC DEPOSITION MODELING AND MONITORING OF NUTRIENTS |
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This talk presents an overview of the capabilities and roles that regional atmospheric deposition models can play with respect to multi-media environmental problems. The focus is o...
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ATMOSPHERIC WET SULPHATE DEPOSITION AND LAKEWATER CHEMISTRY (JOURNAL VERSION) |
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Atmospheric sulphur deposition and its impacts on surface-water chemistry and biota have been extensively studied in several areas of the United States and elsewhere during the pas...
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AUTOMATED APPROACHES FOR PRODUCING REGIONAL RUNOFF MAPS OF THE NORTHEASTERN UNITED STATES |
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We have conducted research to find a faster, simpler, less expensive way to create runoff (i.e., runoff-depth) contour maps using automated procedures. ur goal was to produce maps ...
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AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT (AGWA) DOCUMENTATION VERSION 2.0 |
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The Automated Geospatial Watershed Assessment Http://www.epa.gov/nerlesd1/landsci/agwa/introduction.htm and www.tucson.ars.ag.gov/agwa) tool is a GIS interface jointly
developed b...
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AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT (AGWA): A GIS-BASED HYDROLOGIC MODELING TOOL FOR LANDSCAPE ASSESSMENT AND WATERSHED MANAGEMENT |
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The assessment of land use and land cover is an extremely important activity for contemporary land management. A large body of current literature suggests that human land-use pract...
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AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT (AGWA): A GIS-BASED HYDROLOGICAL MODELING TOOL FOR WATERSHED MANAGEMENT AND LANDSCAPE ASSESSMENT |
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The Automated Geospatial Watershed Assessment (http://www.epa.gov/nerlesd1/land-sci/agwa/introduction.htm and www.tucson.ars.ag.gov/agwa) tool is a GIS interface jointly developed ...
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AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT (AGWA): A GIS-BASED HYRDOLOGIC MODELING TOOL FOR WATERSHED ASSESSMENT AND ANALYSIS |
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The Automated Geospatial Watershed Assessment tool (AGWA) is a GIS interface jointly
developed by the USDA Agricultural Research Service, the U.S. Environmental Protection |
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AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT: A GIS-BASED HYDROLOGIC MODELING TOOL |
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Planning and assessment in land and water resource management are evolving toward complex, spatially explicit regional assessments. These problems have to be addressed with distrib...
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AUTOMATED GEOSPATICAL WATERSHED ASSESSMENT (AGWA): A GIS-BASED HYDROLOICAL MODELING TOOL FOR WATERSHED ASSESSMENT AND ANALYSIS |
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The Automated Geospatial Watershed Assessment tool (AGWA) is a GIS interface jointly developed by the USDA Agricultural Research Service, the U.S. Environmental Protection Agency, ...
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AUTOMATED GIS WATERSHED ANALYSIS TOOLS FOR RUSLE/SEDMOD SOIL EROSION AND SEDIMENTATION MODELING |
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A comprehensive procedure for computing soil erosion and sediment delivery metrics has been developed using a suite of automated Arc Macro Language (AML ) scripts and a pair of pro...
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Advanced Concepts Research Initiative |
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This initiative is investigating various approaches to controlling and treating wet-weather flow (WWF) discharges in the urban watershed. WWF, including combined sewer overflow (C...
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Analysis of Enterococci and Bacteriodales Fecal Indicator Bacteria in a Lake Michigan Tributary by Real-Time Quantitative PCR |
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The Salt Creek watershed in northwest Indiana drains into Lake Michigan near several heavily used recreational beaches. This study aimed to investigate the levels of fecal indicat...
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Application of restoration scenarios to basin-scale demographics of coho salmon inferred from pit-tags |
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Effective habitat restoration planning requires correctly anticipating demographic responses to altered habitats. New applications of Passive Integrated Transponder (PIT) tag tech...
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Assessing patterns of fish demographics and habitat in stream networks |
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Effective habitat restoration planning requires correctly anticipating demographic responses to altered habitats. New applications of Passive Integrated Transponder (PIT) tag tech...
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Assessment of Equine Fecal Contamination: The Search for Alternative Bacterial Source-tracking Targets |
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16S rDNA clone libraries were evaluated for detection of fecal source-identifying bacteria from a collapsed equine manure pile. Libraries were constructed using universal eubacteri...
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BACKGROUND MATERIALS FOR WATERSHED CENTRAL DEVELOPMENT WORKSHOP HELD JANUARY 8-10, 2007, IN ATLANTA, GEORGIA (CD) |
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A development workshop for Watershed Central was held in Atlanta, Georgia, January 8-10, 2007. Participants in the workshop included representatives of EPA’s Office of Water, Offi...
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BACTERIA SOURCE TRACKING AND HOST SPECIES SPECIFICITY ANALYSIS |
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Point and non-point pollution sources of fecal pollution on a watershed adversely impact the quality of drinking source waters and recreational waters. States are required to devel...
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BASEFLOW SEPARATION BASED ON ANALYTICAL SOLUTIONS OF THE BOUSSINESQ EQUATION. (R824995) |
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AbstractA technique for baseflow separation is presented based on similarity solutions of the Boussinesq equation. The method makes use of the simplifying assumptions t...
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BAY REGION ATMOSPHERIC CHEMISTRY EXPERIMENT (BRACE) |
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The Tampa Bay Estuary Program (TBEP) was formed in 1991 to assist the community in developing a comprehensive plan to restore and protect Tampa Bay. The ecological indicator of ...
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BEHAVIORAL AND PHYSIOLOGICAL RESPONSES OF DAPHNIA MAGNA, CHLORELLA VULGARIS, CORBICULA FLUMINEA, LEPOMIS MACROCHIRUS, AND VIBRO FISCHERI |
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The research presented here is a continuation of work designed to further the science of available and developing continuous, automated water quality monitors and how they may be m...
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BEHAVIORAL AND PHYSIOLOGICAL RESPONSES OF DAPHNIA MAGNA, CHLORELLA VULGARIS, LEPOMIS MACROCHIRUS, AND VIBRIO FISCHERI TO TOLUENE |
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The research presented here is a continuation of work designed to further the science of available and developing online toxicity monitors(OTMs) and how they may be most effectivel...
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BEHAVIORAL AND PHYSIOLOGICAL RESPONSES OF DAPHNIA MAGNA, CHLORELLA VULGARIS, CORBICULA FLUMINEA, AND LEPOMIS MACROCHIRUS TO COPPER AND CYANIDE |
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The research presented here was designed to further the science of available and developing continuous, automated water quality monitors and how they may be most effectively deploy...
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BENEFITS OF SEWERAGE SYSTEM REAL-TIME CONTROL |
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Real-time control (RTC) is a custom-designed computer-assisted management system for a specific urban sewerage network that is activated during a wet-weather flow event. Though use...
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BENEFITS OF SEWERAGE SYSTEM REAL-TIME CONTROL |
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Real-time control (RTC) is a custom-designed computer-assisted management system for a specific urban sewerage network that is activated during a wet-weather flow event. Though use...
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BEYOND WATER QUALITY: CAN THE CLEAN WATER ACT BE USED TO REDUCE THE QUANTITY OF STORMWATER RUNOFF? |
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Improving water quality by targeting stormwater runoff and the pollutants it carries has become an increasingly important and discussed issue in both environmental policy and urban...
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BIG DARBY CREEK WATERSHED |
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What is an ecological risk assessment?
An ecological risk assessment evaluates the potential adverse effects of human
activities on the plants and animals that make up...
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BIOASSESSMENT OF WADEABLE STREAMS IN USEPA REGION 8, USING THE EMAP CHEMISTRY INDICATOR, BENTHIC MACROINVERTEBRATE INDICATOR, WATER COLUMN TOXICITY TESTS, AND SEDIMENT TOXICITY TESTS |
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Almost 95% of the mineralized portion of the Rocky Mountains are contained in the Southern Rockies Ecoregion. For the past century, extensive mining of metals has occurred in this...
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BIODEGRADATION OF METHYL TERT-BUTYL ETHER USING AN INNOVATIVE BIOMASS CONCENTRATOR REACTOR |
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The aerobic biodegradation of methyl tert-butyl ether (MTBE) was investigated using a pilot-scale Biomass Concentrator Reactor (BCR). The reactor was operated for a year a...
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BIODEGRADATION OF METHYL TERT-BUTYL ETHER AND BTEX AT VARYING HYDRAULIC RETENTION TIMES |
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The feasibility of biologically degrading methyl tert-butyl ether (MTBE) contaminated groundwater is dependent on the ability to degrade MTBE and its byproducts in the presence of ...
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BIODIVERSITY MANAGEMENT APPROACHES FOR STREAM-RIPARIAN AREAS: PERSPECTIVES FOR PACIFIC NORTHWEST HEADWATER FORESTS, MICROCLIMATES, AND AMPHIBIANS |
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Stream-riparian areas represent a nexus of biodiversity, with disproportionate numbers of species tied to and interacting within this key habitat. New research in Pacific Northwest...
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BIOGEOCHEMICAL INDICATORS OF ORGANIC WASTE CONTAMINATION IN GEORGIA PIEDMONT STREAMS |
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We monitored concentrations of nitrous oxide, methane, carbon dioxide, nutrients and other parameters (T, conductivity, dissolved oxygen, alkalinity, pH, DOC, DON, flow rate) in 17...
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BIOGEOCHEMICAL INDICATORS OF ORGANIC WASTE CONTAMINATION IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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We monitored concentrations of nitrous oxide, methane, carbon dioxide, nutrients and other parameters (T, conductivity, dissolved oxygen, alkalinity, pH, DOC, DON, flow rate) in 17...
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BIOGEOCHEMISTRY OF ALUMINUM IN MCDONALDS BRANCH WATERSHED, NEW JERSEY PINE BARRENS |
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Aluminum concentrations, fluxes, and storage were measured in the vegetation, forest floor, and acid, sandy mineral soil of a forested watershed in the New Jersey Pine Barrens. Vol...
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BIOLOGICAL AND ECONOMIC IMPLICATIONS OF SACRAMENTO WATERSHED MANAGEMENT OPTIONS. (R825285) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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BIOLOGICAL LINKAGES BETWEEN LANDUSE AND WATER QUALITY: THE USE OF NITROGEN STABLE ISOTOPES FOR DIAGNOSING THE CAUSE AND SOURCE OF WATER POLLUTION |
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A shortcoming in developing nutrient TMDLs is accurately linking the causes and sources of the anthropogenic nutrients at the landscape scale. Previous research of others has shown...
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BIOLOGICAL SINKS FOR N ADDITIONS TO A FORESTED CATCHMENT |
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The goal of our research is to identify and quantify sinks for experimental Nitrogen (N) additions to a forested catchment at the Bear Brooks Watershed in Maine (BBWM) where backgr...
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BIOSENSOR TECHNOLOGY EVALUATIONS FOR REAL-TIME/SOURCE WATER PROTECTION |
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Recent advances in electronics and computer technology have made great strides in the field of remote sensing and biomonitoring. The quality of drinking water sources has come und...
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BMP UNIT PROCESS DESIGN, MONITORING, AND PERFORMANCE |
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Urbanization results in more impervious areas that cause larger quantities of stormwater runoff. This runoff can contribute significant amounts of pollutants (e.g., litter, oils, m...
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BOOK REVIEW OF 'ACID RAIN: A WATER RESOURCES ISSUE FOR THE 80'S' |
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The volume is a collection of papers dealing with a variety of topical areas associated with the study of the effects of acidic deposition on watersheds and water resources. Becaus...
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BOOK REVIEW: ESTUARINE SCIENCE: A SYNTHETIC APPROACH TO RESEARCH AND PRACTICE |
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This book is the product of fifty leading estuarine scientists most of whom attended a workshop convened for the purpose of "put[ting] together the case for synthesis of estuarine ...
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BOOK REVIEW: FISHES AND FORESTRY - WORLDWIDE WATERSHED INTERACTIONS AND MANAGEMENT |
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abstract for book review to be published in journal...
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Bioretention Monitoring: Designing Rain Gardens to Promote Nitrate Removal |
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Laboratory and field-scale studies of bioretention systems have often shown these structures to have a high capacity for removal of suspended solids, heavy metals, and phosphorus. ...
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CALCULATION OF SOIL-WATER AND BENTHIC SEDIMENT PARTITION COEFFICIENTS FOR MERCURY |
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To accurately model mercury transport to water bodies, an assessment of this pollutant's behavior in the watershed is critical. Partition coefficients, defined as an estimate of th...
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CALIBRATING A RAPID WETLAND ASSESSMENT METHOD TO AN INTENSIVE METHOD IN THE NANTICOKE BASIN, DELAWARE AND MARYLAND, USA |
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abstract for presentation...
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CAMP BRANCH AND CROSS CREEK EXPERIMENTAL WATERSHED PROJECTS: OBJECTIVES, FACILITIES, AND ECOLOGICAL CHARACTERISTICS |
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Small experimental watersheds in the eastern United States, which define practical ecosystems, are used to study and evaluate (1) the impact of anthropogenic emissions on individua...
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CARBON EXCHANGE DYNAMICS AND MINERAL WEATHERING IN A TEMPERATE FORESTED WATERSHED (NORTHERN MICHIGAN): LINKS BETWEEN FOREST ECOSYSTEMS AND GROUNDWATERS (R824979) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CART DIAGNOSIS OF WATERSHED IMPAIRMENT IN THE MID-ATLANTIC REGION |
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Many factors ( stressors ) can lead to increased concentrations of nutrients and sediments, and these factors change across watersheds. Classification and Regression Tree (CART) is...
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CASE STUDY APPLICATION OF THE BASINS CLIMATE ASSESSMENT TOOL, AND DEVELOPMENT OF A FRAMEWORK FOR ASSESSING CLIMATE CHANGE IMPACTS ON WATER QUALITY IN THE CHESAPEAKE BAY WATERSHED |
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Much of the U.S. is likely to experience warming temperatures and changes in precipitation amount and/or intensity during the next century. Water resources are highly vulnerable t...
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CATAWISSA CREEK MINE DRAINAGE ABATEMENT PROJECT |
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The objective of this study was to determine the feasibility of flooding underground coal mine workings in an isolated basin of coal, thereby restoring or partially restoring the g...
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CAUSAL ANALYSIS AND ADAPTIVE MANAGEMENT IN THE WILLIMANTIC RIVER, CONNECTICUT THAT LED TO IMPROVED BENTHIC COMMUNITY CONDITION |
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Determining the cause of a biological impairment can be a daunting task, one that is complicated by multiple possible causes, spotty or irregularly collected data, natural variatio...
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CAUSAL ANALYSIS OF BIOLOGICAL IMPAIRMENT IN LONG CREEK, A SANDY-BOTTOMED STREAM IN COASTAL SOUTHERN MAINE (EXTERNAL REVIEW DRAFT) |
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This case study presents results from a complex assessment of a biologically impaired urbanized coastal watershed located primarily in South Portland, Maine, U.S.A., the Long Creek...
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CAUSAL ANALYSIS OF BIOLOGICAL IMPAIRMENT IN LONG CREEK, A SANDY-BOTTOMED STREAM IN COASTAL SOUTHERN MAINE (Final Report) |
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This assessment presents results from a complex causal assessment of a biologically impaired, urbanized coastal watershed located primarily in South Portland, Maine, USA—the Long C...
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CHALLENGES AND SUCCESSES MODELING THE INFLUENCES OF LAND USE CHANGES ON MERCURY DYNAMICS |
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Linked sets of atmospheric, watershed, water body, and food web models and supporting data are required to evaluate the effectiveness of proposals to regulate atmospheric mercury e...
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CHALLENGES IN MODELING ASSOCIATIONS BETWEEN STREAMS AND THEIR WATERSHEDS |
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abstract for presentation...
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CHANGES IN ANTHROPOGENIC IMPERVIOUS SURFACES, PRECIPITATION AND DAILY STREAMFLOW DISCHARGE: A HISTORICAL PERSPECTIVE IN A MID-ATLANTIC SUB-WATERSHED |
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Aerial photography provides a historical vehicle for determining long term urban landscape change and, with concurrent daily streamflow and precipitation records, allows ...
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CHANGES IN MASS AND CHEMISTRY OF PLANT ROOTS DURING LONG-TERM DECOMPOSITION ON A CHIHUAHUAN DESERT WATERSHED |
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We studied the spatial and temporal patterns of decomposition of roots of a desert sub-shrub, a herbaceous annual, and four species of perennial grasses at several locations on nit...
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CHARACTERISTIC LENGTH SCALE OF INPUT DATA IN DISTRIBUTED MODELS: IMPLICATIONS FOR MODELING GRID SIZE. (R824784) |
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The appropriate spatial scale for a distributed energy balance model was investigated by: (a) determining the scale of variability associated with the remotely sensed and GIS-gener...
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CHARACTERISTICS OF HYDROGEOMORPHIC CLASSES OF WETLANDS IN THE JOHN DAY WATERSHED IN ARID, EASTERN OREGON, U.S.A. |
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abstract for presentation...
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CHARACTERIZATION AND PREDICTION OF NUTRIENTS AND PESTICIDES IN BASE FLOW CONDITIONS OF FIRST ORDER STREAMS IN THE MID-ATLANTIC COASTAL PLAIN-A COLLABORATIVE EFFORT |
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The Landscape Indicators for Pesticides Study in Mid-Atlantic Coastal Streams (LIPS-MACS) is a collaborative research effort between the U.S. Environmental Protection Agency's Offi...
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CHARACTERIZATION OF LAND USE IN RIPARIAN AREAS WITHIN THE CONTENTNEA WATERSHED OF NORTH CAROLINA |
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Characterization of land use in riparian areas within the Contentnea watershed of North Carolina.
Wright, C.J.,1 and S.W. Alberty.2 1U.S. Environmental Protection Agency, At...
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CHARACTERIZING AND MITIGATING PATHOGENIC ORGANISMS RELATED TO CAFOS |
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CHARACTERIZING AND MITIGATING PATHOGENIC ORGANISMS RELATED TO CAFOs
John Haines and Shane Rogers NRMRL
Science Questions
MYP Science Ouestion: What BMP treatment systems and...
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CHARACTERIZING SPATIAL AND TEMPORAL DYNAMICS: DEVELOPMENT OF A GRID-BASED WATERSHED MERCURY LOADING MODEL |
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A distributed grid-based watershed mercury loading model has been developed to characterize spatial and temporal dynamics of mercury from both point and non-point sources. The mode...
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CHARACTERIZING SURFACE WATERS THAT MAY NOT REQUIRE FILTRATION |
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Field data from various utilities were studied with the object of identifying a set of characteristics of a surface water that might allow it to be successfully treated by disinfec...
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CHEMISTRY OF DISSOLVED ORGANIC CARBON AT BEAR BROOK WATERSHED, MAINE: STREAM WATER RESPONSE TO (NH4)2SO4 ADDITIONS. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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CHESAPEAKE BAY WATERSHED PILOT PROJECT |
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The major objective of the EMAP Chesapeake Bay Watershed Pilot Project was the development and testing of methods for producing detailed digital land cover and land use data over l...
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CLASSIFICATION OF HIGH SPATIAL RESOLUTION, HYPERSPECTRAL REMOTE SENSING IMAGERY OF THE LITTLE MIAMI RIVER WATERSHED IN SOUTHWEST OHIO, USA (FINAL) |
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The document and associated land use/land cover (LULC) coverage, entitled Classification of High Spatial Resolution, Hyperspectral Remote Sensing Imagery of the Little Miami Riv...
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CLASSIFICATION OF STREAM SENSITIVITY: A FRAMEWORK FOR MONITORING, ASSESSMENT AND DIAGNOSIS |
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This powerpoint presentation came from a poster that was at the June 2004 EPA Science Forum in Washington, D.C. EPA Regional Scientists, in conjunction with state and regional mana...
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CLASSIFICATION OF STREAM SENSITIVITY: A FRAMEWORK FOR MONITORING, ASSESSMENT, CRITERIA DEVELOPMENT, AND DIAGNOSIS |
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Poster presentation at a scientific meeting...
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CLASSIFICATION TOOLS FOR EFFICIENT IDENTIFICATION OF MULTIPLE SOURCES OF IMPAIRMENT: A FIELD TEST OF GEOGRAPHICALLY-DEPENDENT VS. THRESHOLD-BASED GEOGRAPHICALLY-INDEPENDENT CLASSIFICATION SCHEMES |
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Current monitoring strategies for iotic ecosystems have focused on identification of either specific impaired stream reaches or regional incidence of impaired stream reaches, with ...
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CLASSIFYING OREGON ESTUARIES BY HABITAT: ANALYSIS OF EXISTING DATA AND A PROPOSAL FOR A PILOT STUDY |
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Because many estuarine resources are linked to benthic habitats, classification of estuaries by habitat types may prove a relevant approach for grouping estuaries with similar ecol...
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CLASSIFYING SOILS FOR ACIDIC DEPOSITION AQUATIC EFFECTS: A SCHEME FOR THE NORTHEAST USA |
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The Direct/Delayed Response Project (DDRP) is estimating the number of lakes and streams in three U.S. regions that might become acidic due to current or altered levels of acidic d...
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CLEAN AIR ACT REQUIREMENTS FOR TRACE METALS AND AIR TOXICS INFORMATION |
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The Clean Air Act Amendments of 1990 have expanded the requirements for trace metal and air toxics information in urban areas and added new requirements for this information in rur...
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CLEANING UP WEST VIRGINIA: WHAT'S IT WORTH? ENVIRONMENTAL AND ECONOMIC PERSPECTIVES |
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In this presentation I discuss cleanup of AMD impaired waterways in the Cheat River Watershed of West Virginia from an economic standpoint. Appalachian states have an especially l...
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CLIMATE AND ANTHROPOGENICACHANGES IN THE POTOMAC WATERSHED AND CHESAPEAKE BAY |
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Platform presentation at a scientific conference...
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CLIMATE AND LAND USE CHANGE EFFECTS ON ECOLOGICAL RESOURCES IN THREE WATERSHEDS: A SYNTHESIS REPORT |
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This report is a synthesis of three watershed case-study assessments conducted by GCRP to advance the capability of management decisions. The report compares and contrasts methods...
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CLIMATE AND LAND USE CHANGE EFFECTS ON ECOLOGICAL RESOURCES IN THREE WATERSHEDS: A SYNTHESIS REPORT (EXTERNAL REVIEW DRAFT) |
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The purpose of this draft report is to provide a summary of climate change impacts to selected watersheds and recommendations for how to improve the process of conducting watershed...
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CLINCH AND POWELL VALLEY WATERSHED ECOLOGICAL RISK ASSESSMENT |
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A watershed ecological risk assessment of the unique Clinch and Powell river system in southwestern Virginia strongly suggests that (1) coal mining activities and agricultural prac...
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COAL MINE RELATED STREAM SEDIMENT GEOCHEMISTRY IN SOUTHERN ILLINOIS |
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A regional survey in stream sediment geochemistry indicates that downstream areas from coal mines or coal related land uses can contain four times the median value of several eleme...
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COASTAL CONDITIONS IN THE VIRGINIAN PROVINCE (CAPE COD TO CAPE HENRY) |
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The U.S. EPA Environmental Monitoring and Assessment Program (EMAP) collected ecological condition data during 1990 through 1993 from the estuarine waters of the Virginian Biogeog...
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COASTAL ECOLOGICAL DATA FROM THE VIRGINIAN BIOGEOGRAPHIC PROVINCE 1990-1993 |
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The U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP) assessed the ecological condition of estuaries, bays, and tidal rivers in the Virg...
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COASTAL INDICATOR RESEARCH AND EPA COLLABORATION WITH GLEI |
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EPA's collaboration with GLEI keys from a principal strength of the GLEI effort ? its focus on responsiveness/sensitivity of potential biological indicators. This focus has lead t...
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COASTAL SALT MARSH COMMUNITY CHANGE IN NARRAGANSETT BAY IN RESPONSE TO CULTURAL EUTROPHICATION |
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Coastal salt marshes are susceptible to cultural eutrophication, particularly the over-enrichment of nitrogen, because they are often located where surface water and groundwater d...
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COHO SALMON DEPENDENCE ON INTERMITTENT STREAMS |
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In February 2006, the US Supreme Court heard cases that may affect whether intermittent streams are jurisdictional waters under the Clean Water Act. In June 2006, however, the case...
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COLLABORATIVE RESEARCH ON URBAN BEST MANAGEMENT PRACTICES |
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Storm driven wet weather flow (WWF) which includes combined sewer and sanitary sewer overflows and stormwater discharges are a leading cause of water-quality impairment. Problem c...
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COMBINING HBM AND EMAP PROCEDURES TO ASSESS WETLANDS AT THE WATERSHED SCALE -- STATUS OF FLATS AND NON-TIDAL RIVERINE WETLANDS IN THE NANTICOKE RIVER WATERSHED, DELAWARE AND MARYLAND (USA) |
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The hydrogeomorphic (HGM) approach to wetland assessment was combined with the Environmental Monitoring and Assessment Program (EMAP) survey design procedures to evaluate the condi...
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COMMUNICATING AND CHARACTERIZING ECOLOGICAL RISK AT THE WATERSHED SCALE |
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Since the biggest environmental problems in the United States now stem from nonpoint sources of pollution that are not regulated by Federal laws, a watershed approach to environmen...
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COMMUNICATION: SHOULD ECOLOGICAL REGIONS OR LAND-COVER COMPOSITION GUIDE ESTABLISHMENT OF NUTRIENT CRITERIA |
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The continuing expansion of anthropogenic influence across the continental United States has motivated the establishment of nutrient criteria for streams, lakes, and estuaries as a...
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COMMUNICATION: SHOULD ECOLOGICAL REGIONS OR LAND-COVER COMPOSITION GUIDE ESTABLISHMENT OF NUTRIENT CRITERIA? |
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The continuing expansion of anthropogenic influence across the continental United States has motivated the establishment of nutrient criteria for streams, lakes, and estuaries as a...
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COMMUNITY BASED ENVIRONMENTAL PROTECTION |
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Community Based Environmental Protection intends to make environmental protection spring from the needs and values of the community of interest. Real community involvement in prote...
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COMPARABILITY OF A REGIONAL AND STATE SURVEY: EFFECTS ON FISH IBI ASSESSMENT FOR WEST VIRGINIA, U.S.A. |
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The comparability of different survey designs needs to be established to facilitate integration of data across scales and interpretation of trends over time. Probability-based su...
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COMPARATIVE ASSESSMENT OF TWO DISTRIBUTED WATERSHED MODELS WITH APPLICATION TO A SMALL WATERSHED |
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Distributed watershed models are beneficial tools for assessment of management practices on runoff and water-induced erosion. This paper evaluates, by application to an experimenta...
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COMPARING ECOLOGICALLY SCALED LANDSCAPE INDICES WITH A SPATIALLY EXPLICIT POPULATION MODEL |
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Vos et al. (2001) proposed a class of landscape indices they called ecologically scaled. By this they meant that the indices incorporate species-specific characteristics that are ...
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COMPARING FUNCTIONAL ASSESSMENTS OF WETLANDS TO MEASUREMENTS OF SOIL CHARACTERISTICS AND NITROGEN PROCESSING |
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One beneficial service of wetland ecosystems is the improvement of water quality through
nitrogen (N) removal. However, one important N-removal process, denitrification, can produ...
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COMPARISON OF DIRECT AND INDIRECT IMPACTS OF FECAL CONTAMINATION IN TWO DIFFERENT WATERSHEDS |
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There are many environmental parameters that could affect the accuracy of microbial source tracking (MST) methods. Spatial and temporal determinants are among the most common facto...
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COMPARISON OF GENKENSIA DEMISSA (DILLWYN) POPULATIONS IN RHODE ISLAND FRINGE MARSHES WITH VARYING NITROGEN LOADS |
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Increased residential development in coastal watersheds has led to increases in anthropogenic nitrogen inputs into estuaries. Sessile bivalves are good candidate organisms to exam...
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COMPARISON OF HYDROLOGIC RESPONSES AT DIFFERENT WATERSHED SCALES |
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Land surface hydrology controls runoff production and the associated transport of sediments, and a wide variety of anthropogenic organic chemicals, and nutrients from upland landsc...
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COMPARISON OF RIBBED MUSSEL POPULATIONS IN MARSHES SUBJECT TO INCREASING LAND USAGE AND NUTRIENT LOADING |
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Abstract: Narragansett Bay salt marshes of similar geomorphology and hydrology were clustered into low, medium and high human impact based on land use and nutrient inputs. We measu...
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COMPARISONS AND CONTRASTS AMONG DIFFERENT SCALED ASSESSMENTS |
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A comparison of a regional (multi-state) and local (multi-county) scale assessment was done to evaluate similarities and differences in the collection, analysis, and interpretation...
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COMPLEMENTARY APPROACHES TO WATERSHED ASSESSMENT |
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Anthropogenic activities in watersheds affect aquatic organisms, riparian vegetation, and their ability to support avian populations. Our objective was to compare indicators of s...
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COMPONENTS OF VARIABILITY IN WESTERN LAKE SUPERIOR LANDSCAPES |
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Watershed storage and hydrologic connectivity appear to be system driving variables, regulating energy and water flow, and playing potentially important roles in hydrologic and tem...
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COMPREHENSIVE RESEARCH AND MANAGEMENT OF IMPERVIOUS SURFACE IMPACTS ON WATERSHED HYDROLOGY |
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Impervious surface is one of the primary agents of hydrologic change in urbanizing watersheds, and its impacts on hydrologic cycles and terrestrial ecological regimes are multifold...
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COMPREHENSIVE RESEARCH AND MANAGEMENT OF IMPERVIOUS SURFACES IMPACTS ON WATERSHED HYDROLOGY |
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Impervious surface is one of the primary agents of hydrologic change in urbanizing watersheds, and its impacts on hydrologic cycles and terrestrial ecological regimes are multifold...
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CONDITION ASSESSMENT FOLLOWING TMDL IMPLEMENTATION USING CHEMICAL SPECIATION AND VOLUNTEER MONITORING |
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The Connecticut Department of Environmental Protection developed a Total Maximum Daily Load (TMDL) for copper toxicity in Steel Brook, Watertown /Oakville, CT in 1999. The analysi...
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CONDITION ASSESSMENT FOR THE ESCAMBIA RIVER, FL, WATERSHED: BENTHIC MACROINVERTEBRATE SURVEYS USING A PROBABILISTIC SAMPLING DESIGN |
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Probabilistic sampling has been used to assess the condition of estuarine ecosystems, and the use of this survey design approach was examined for a northwest Florida watershed. Twe...
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CONDITION ASSESSMENT FOR THE ESCAMBIA RIVER, FL, WATERSHED: BENTHIC MACROINVERTEBRATE SURVEYS USING A PROBABILISTIC SAMPLING DESIGN (POSTER SESSION) |
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Probabilistic sampling has been used to assess the condition of estuarine ecosystems, and the use of this survey design approach was examined for a northwest Florida watershed. Twe...
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CONFIRMING THE RESULTS: AN ACCURACY ASSESSMENT OF REMOTE PRODUCTS, AN EXAMPLE COMPARING MULTIPLE MID-ATLANTIC SUB-PIXEL IMPERVIOUS SURFACE MAPS |
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Anthropogenic impervious surfaces have an important relationship with non-point source pollution (NPS) in urban watersheds. The amount of impervious surface area in a watershed is ...
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CONNECTING WATERSHED CHARACTERISTICS TO NUTRIENT REGIME FROM HEADWATERS TO RECEIVING WATERS IN THE LAURENTIAL GREAT LAKES |
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We are evaluating the influence of position along the tributary-coastal wetland-lake continuum on the expression of watershed characteristics in the water quality of Great Lakes (G...
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CONSIDERATION IN THE DESIGN OF TREATMENT BEST MANAGEMENT PRACTICES (BMPS) TO IMPROVE WATER QUALITY |
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For the past three decades, municipalities in the United States have successfully addressed pollution in the watershed by collecting and treating their wastewater. Currently, all ...
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CONSTRUCTED WETLANDS FOR TREATMENT OF HEAVY METALS IN URBAN STORMWATER RUNOFF: CHEMICAL SPECIATION OF WETLAND SEDIMENTS |
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Heavy metals in urban stormwater runoff are primarily removed by sedimentation in stormwater best management practices (BMPs) such as constructed wetlands. Heavy metals accumulated...
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CONSTRUCTED WETLANDS VS. RETENTION POND BMPS: MESOCOSM STUDIES FOR IMPROVED POLLUTANT MANAGEMENT IN URBAN STORMWATER TREATMENT |
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Increased urbanization has increased the amount of directly connected impervious area that results in large quantities of stormwater runoff. This runoff can contribute significant...
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CONSTRUCTED WETLANDS VS. RETENTION POND BMPS: MESOCOSM STUDIES FOR IMPROVED POLLUTANT MANAGEMENT IN URBAN STORMWATER TREATMENT |
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Increased urbanization has increased the amount of directly connected impervious area that results in large quantities of stormwater runoff. This runoff can contribute significant...
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CONTRIBUTION OF NUTRIENTS AND E.COLI TO SURFACE WATER CONDITION IN THE OZARKS: PART II USING LANDSCAPE ECOLOGY AND PARTIAL LEAST SQUARES PREDICTIONS TO MAP WATERSHEDS THAT ARE VULNERABLE TO NON-POINT SOURCE POLLUTION |
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The results of this project provide watershed managers with the first broad-scale predictions that can be used to explain how land cover type, land cover configuration, environment...
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CONTRIBUTIONS OF QUALITY ASSURANCE/QUALITY CONTROL TO EMERGING TECHNIQUES IN ECOLOGY: NOT JUST FOR CHEMISTS ANYMORE |
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The structure of biological monitoring designs has become critical as support not only for assessments of condition under Section 305(b) of the Clean Water Act but also as the star...
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CONTROLLING EXCESS STORM WATER RUNOFF WITH TRADABLE CREDITS |
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Development that increases the impervious surface in a watershed causes excess storm water runoff (SWR) that has been identified as a major contributor to stream and riparian habit...
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CONTROLLING STORM WATER RUNOFF WITH TRADABLE CREDITS FOR IMPERVIOUS SURFACES |
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Storm water flow off impervious surface in a watershed can lead to stream degradation, habitat alteration, low base flows and toxic leading. We show that a properly designed tradab...
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CONTROLLING STORMWATER RUNOFF WITH TRADABLE CREDITS FOR IMPERVIOUS SURFACES |
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Stormwater flow from an impervious surface can lead to stream degradation, habitat alteration, low base flows and increased toxic loadings from nonpoint sources, a problem that has...
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CONTROLS OF SEAGRASS EPIPHYTE ABUNDANCE: DOES LIGHT TRUMP NUTRIENTS? |
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Epiphytes on seagrass growing in the lower intertidal were examined along an estuarine gradient within Yaquina Bay, Oregon over a period of 4 years. The Yaquina Estuary receives h...
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CONTROLS ON NUTRIENT LOSSES FROM A FORESTED BASIN IN THE OREGON COAST RANGE |
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Although conceptual models of watershed biogeochemistry emphasize the movement of materials from the land to the sea, important transfers occur in the reverse direction in coastal ...
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CONTROLS ON STREAM CHEMISTRY IN AN OREGON COASTAL WATERSHED: THE SALMON RIVER |
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Numerous factors may control losses of dissolved nutrients from forested basins in the Oregon Coast Range. Potentially important factors include forest composition, stand age, for...
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CORAL REEF BIOCRITERIA |
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Coral reefs worldwide are experiencing the greatest decline of their known existence and few tools are available to offset the growing impacts of human coastal and watershed activi...
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COST-EFFECTIVE ALLOCATION OF WATERSHED MANAGEMENT PRACTICES USING A GENETIC ALGORITHM |
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Implementation of conservation programs are perceived as being crucial for restoring and protecting waters and watersheds from non-point source pollution. Success of these programs...
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COSTS AND WATER QUALITY IMPACTS OF REDUCING AGRICULTURAL NONPOINT SOURCE POLLUTION: AN ANALYSIS METHODOLOGY |
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This study addresses the problem of analyzing nonpoint source pollution impacts from agriculture. A methodology for regional-level planning is presented that, with further refineme...
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CRITERIA FOR PRIORITIZATION OF ECOSYSTEM RESTORATION |
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Prioritization of ecosystem restoration measures is important for state and federal agencies, watershed coalitions, science advisory boards and other groups responsible for decisio...
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CRYPTOSPORIDIUM SOURCE TRACKING TO ENHANCE SOURCE WATER PROTECTION IMPLEMENTATION IN THE POTOMAC RIVER WATERSHED: A REGIONAL APPLIED RESEARCH EFFORTS (RARE) PROJECT |
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The Potomac River watershed is a critical drinking water supply for the Washington DC metropolitan area. In 2004, the Drinking Water Source Protection Partnership (DWSPP) was forme...
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CYPRINID DISTRIBUTIONS IN NORTHEAST U.S.A. LAKES: EVIDENCE OF REGIONAL-SCALE MINNOW BIODIVERSITY LOSSES |
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Fish assemblages were sampled in 195 randomly selected lakes in the northeastern United States during the summers of 1991-1994. Most lakes in northern Maine had three to seven minn...
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Climate Change Impacts on Water Resources and Water Supply Security through Adaptation |
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This presentation is to describe the water resources adaptation program (WRAP) at the U.S.EPA National Risk Management Research Laboratory, and to highlight initial research result...
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Coldwater fishes and thernal refuges in hot water: Synthesis and future directions |
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Characterizing spatial and temporal variability of thermal refuges used by coldwater fishes is increasingly becoming important for researchers and water resources practitioners see...
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Comparative Analysis Of River Conservation In The United States And South Africa |
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Both the United States and South Africa are recognized for their strong and innovative approaches to the conservation of river ecosystems. These national programs possess similar d...
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Cryptosporidium Source Tracking in the Potomac River Watershed |
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To better characterize the presence of Cryptosporidium in the Potomac River watershed, a PCR-based genotyping tool was used to analyze 64 base-flow and 28 storm-flow samples from f...
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Current Research at EPA's Urban Watershed Research Facility |
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Description of current research and approaches at the U.S. EPA's Urban Watershed Research Facility....
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DATA TOOLS AND INTERPRETATION |
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As watershed groups in the state of Georgia form and develop, they have a need for collecting, managing, and analyzing data associated with their watershed. Possible sources of dat...
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DATABASE OF THE NONINDIGENOUS SPECIES IN THE ESTUARIES OF CALIFORNIA, OREGON, AND WASHINGTON |
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The number and composition of the native and nonindigenous species is a key component in invasive species risk assessments and regional prioritizations. The problem for both manage...
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DECENTRALIZED STORMWATER MANAGEMENT: RETROFITTING HOMES, RESTORING WATERSHEDS |
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Stormwater runoff from impervious surfaces in urban and suburban areas has led to human safety risks and widespread stream ecosystem impairment. While centralized stormwater manag...
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DECISION SUPPORT FRAMEWORK FOR PLACEMENT OF BMPS IN URBAN WATERSHEDS |
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To assist stormwater management professionals in planning for best management practices (BMPs) implementation, the U.S. Environmental Protection Agency (USEPA) initiated a research...
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DECISION TOOL FOR RIPARIAN ECOSYSTEM MANAGMENT IN THE MID-ATLANTIC HIGHLANDS |
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In the Canaan Valley Highlands of the Mid-Atlantic, riparian zone restoration has been identified as a critical watershed management practice not only for the ecosystem services pr...
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DEMONSTRATION OF AN INNOVATIVE CAPPING TECHNOLOGY AT THE ANACOSTIA RIVER IN WASHINGTON, D.C. |
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Sediment contamination may affect the health of organisms and provide a source of contaminants to the aquatic food chain. The U.S. Environmental Protection Agency (U.S. EPA) has id...
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DEMONSTRATION OF DEBRIS BASIN EFFECTIVENESS IN SEDIMENT CONTROL |
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This report presents the results of a demonstration of the effectiveness of debris basins in controlling solids in water discharging from surface mine operations. A site in Eastern...
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DENITRIFICATION ENZYME ACTIVITY OF FRINGE SALT MARSHES IN NEW ENGLAND (USA) |
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Coastal salt marshes are a buffer between the uplands and adjacent coastal waters in New England (USA). With increasing N loads from developed watersheds, salt marshes could play a...
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DEPLOYMENT OF A WATER QUALITY EARLY WARNING SYSTEM USING ON-LINE TOXICITY MONITORS |
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Contaminants are of concern when they are found in concentrations that are toxic to plants and/or animals. On–line Toxicity Monitors (OTMs) integrate all factors resulting in...
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DESIGN AND APPLICATION OF A STRATIFIED UNEQUAL-PROBABILITY STREAM SURVEY IN THE MID-ATLANTIC COASTAL PLAIN |
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A stratified random sample with unequal probability selection within strata was used to design a multipurpose survey of headwater watersheds in the Mid-Atlantic Coastal Plain. Obje...
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DESIGN OF A DECISION SUPPORT SYSTEM FOR SELECTION AND PLACEMENT OF BMPS IN URBAN WATERSHEDS |
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The U.S. Environmental Protection Agency (USEPA) has funded the development of a decision support system for selection and placement of best management practices (BMPs) at strategi...
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DESIGN OF THE DECISION SUPPORT SYSTEM FOR PLACEMENT AND SELECTION OF BEST MANAGEMENT PRACTICES (BMPS) FOR STORMWATER CONTROL IN URBAN WATERSHEDS |
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A decision support system for selection and placement of best management practices (BMPs) at strategic locations in urban watersheds is being developed. The primary objective of t...
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DESIGNS FOR ESTIMATING VARIABILITY STRUCTURE AND IMPLICATIONS FOR DETECTING WATERSHED RESTORATION EFFECTIVENESS |
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The evaluation of stream restoration projects is moving from a focus on project specific effectiveness to a more holistic evaluation of the array of restoration activities that are...
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DESIGNS FOR THE FUTURE: BRIDGING THE GAP BETWEEN ASSESSMENT OF CONDITION AND DIAGNOSIS OF IMPAIRMENT |
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As the EPA, states, and tribes move towards a consolidated assessment and listing process to satisfy requirements of the Clean Water Act, multi-purpose monitoring designs will be ...
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DETAILED SOIL SURVEYS AND DISTRIBUTED BMPS FOR STORMWATER QUANTITY CONTROL. MAKING THE CONNECTION |
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Best management practices (BMPs) that operate on the basis of infiltration can be used at the parcel-level to reduce the volume of stormwater runoff that would otherwise erode land...
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DETECTING FOREST STRESS AND DECLINE IN RESPONSE TO INCREASING RIVER FLOW IN SOUTHWEST FLORIDA, USA |
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Forest stress and decline resulting from increased river flows were investigated in Myakka River State Park (MRSP), Florida, USA. Since 1977, land-use changes around the upper M...
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DETECTING LEVELS OF SUSTAINABLE LAND-USE IN LAKE SUPERIOR WATERSHEDS USING STREAM INVERTEBRATE COMMUNITIES |
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We have been investigating the relationship between watershed land-use and stream ecosystem "health" within 48 western Lake Superior watersheds, trying to identify sustainable land...
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DETECTING STREAM INVERTEBRATE COMMUNITY ALTERATION DUE TO MID TO LOW LEVELS OF WATERSHED LANDSCAPE MODIFICATION |
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As part of an investigation into the effects of watershed landscape alteration on stream ecosystems, quantitative invertebrate samples were collected from riffles in 26 second and ...
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DETECTION AND DISINFECTION OF PATHOGENS IN STORM- GENERATED FLOWS |
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The disease-producing potential of recreational waters is currently estimated through the use of certain bacterial indicators that are believed to be positively correlated with the...
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DETERMINING LEAST- AND MOST-IMPACTED STREAM CONDITIONS USING SURVEY DATA ACROSS THE RANGE OF NATURAL GRADIENTS |
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One of the challenges to developing indicators of ecological condition is to determine what reference conditions are for a given ecosystem. Because human activity often co-varies w...
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DETERMINING THE CAUSES OF ADVERSE EFFECTS IN NEAR COASTAL ECOSYSTEMS: FROM TOXICITY IDENTIFICATION EVALUATIONS TO WATERSHED DIAGNOTICS |
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Several approaches are available for evaluating adverse effects in near coastal ecosystems. These range from performing toxicity tests with individual organisms on water column an...
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DETERMINING THE INFLUENCE OF LANDSCAPE AND RESEARCH-SPECIFIC HABITAT VARIABLES ON VARIATION OF THERMAL CHARACTERISTICS OF STREAMS WITHIN WESTERN LAKE SUPERIOR WATERSHEDS |
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As part of a study to develop and test a framework for predicting sensitivity of watersheds to land-use activities, temperatures were monitored in 48 second- and third- order strea...
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DETERMINING THE MINIMUM NUMBER OF SITES FOR BIOASSESSMENT OF THE OHIO RIVER |
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For wadeable stream bioassessment, much work has been done to determine the number of samples to composite or the appropriate reach length for obtaining an adequate sample. Propor...
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DEVELOPING A CAPABILITY WITHIN BASINS 4.0 FOR ASSESSING THE IMPACTS OF CLIMATE VARIABILITY AND CHANGE ON WATER RESOURCES |
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During the last century, much of the U.S. experienced gradually warming temperatures, increases in precipitation, and increases in the intensity of precipitation events. Water res...
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DEVELOPING A CONCEPT OF ADAPTIVE COMMUNITY LEARNING: CASE STUDY OF A RAPIDLY URBANIZING WATERSHED. (R825758) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEVELOPING AN INTEGRATED ASSESSMENT OF HYPOXIA IN THE NORTHERN GULF OF MEXICO |
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Hypoxia is the condition in which dissolved oxygen levels are below that necessary to sustain most animal life. The largest zone of oxygen depletion in the US coastal waters is fou...
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DEVELOPING AND IMPLEMENTING AN ESTUARINE WATER QUALITY MONITORING, ASSESSMENT AND OUTREACH PROGRAM/THE MYSOUND PROJECT |
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EPA has developed a technology transfer handbook for the EMPACT MYSound Project. The handbook highlights information and monitoring technologies developed from the EMPACT Long Isla...
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DEVELOPING INDICATORS OF NITROGEN SOURCE IN COASTAL ECOSYSTEMS |
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Several studies have linked stable isotope ratios of biota to nitrogen source. In particular, ribbed mussels show promise as sensitive indicators of the origins of nitrogen inputs ...
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DEVELOPING THE NEXT GENERATION OF WATERSHED RISK ASSESSMENT AND MANAGEMENT MODELS: WHERE DO WE GO FROM HERE? |
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Wise management decisions to protect ecological resources require an understanding of how the resource is affcted by multiple stressors at multiple scales and how it responds to th...
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DEVELOPMENT AND EVALUATION OF A FISH ASSEMBLAGE INDEX OF BIOTIC INTEGRITY FOR NORTHWESTERN GREAT PLAINS STREAMS |
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Quantitative indicators of biological integrity are needed for streams in the Great Plains of North America, but it was not known if the Index of Biotic Integrity (IBI) approach ...
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DEVELOPMENT AND EVALUATION OF MULTIPLE-OBJECTIVE DECISION-MAKING METHODS FOR WATERSHED MANAGEMENT PLANNING. (R827146) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEVELOPMENT AND EVALUATION OF THREE UNCERTAINTY APPROACHES IN RESTORE, A DECISION-MAKING TOOL FOR COMMUNITY-BASED WATERSHED RESTORATION. (R827146) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DEVELOPMENT AND TEST APPLICATION A SCREENING-LEVEL MERCURY FATE MODEL AND TOOL FOR EVALUATING WILDLIFE EXPOSURE RISK FOR SURFACE WATERS WITH MERCURY-CONTAMINATED SEDIMENTS (SERAFM) |
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Complex chemical cycling of mercury in aquatic ecosystems means that tracing the linkage between anthropogenic and natural loadings of mercury to watersheds and water bodies and as...
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DEVELOPMENT OF A BIRD INTEGRITY INDEX: MEASURING AVIAN RESPONSE TO DISTURBANCE IN THE BLUE MOUNTAINS OF OREGON, USA |
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The Bird Integrity Index (BII) presented here uses bird assemblage information to assess human impacts to 28 stream reaches in the Blue Mountains of eastern Oregon. Eighty-one can...
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DEVELOPMENT OF A BIRD INTEGRITY INDEX: USING BIRD ASSEMBLAGES AS INDICATORS OF RIPARIAN CONDITION |
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We describe the development of a Bird Integrity Index (Bll) that uses bird assemblage information to assess human impacts on 13 stream reaches in the Willamette Valley, Oregon. We ...
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DEVELOPMENT OF A DISTURBANCE INDEX TO ASSESS THE CONDITION OF AQUATIC ECOSYSTEMS |
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An objective of aquatic monitoring is to assess the condition of aquatic habitats and biota. To rationally interpret aquatic condition, we must identify the range of human activit...
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DEVELOPMENT OF A WATERSHED-BASED MERCURY POLLUTION CHARACTERIZATION SYSTEM |
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To investigate total mercury loadings to streams in a watershed, we have developed a watershed-based source quantification model ? Watershed Mercury Characterization System. The sy...
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DEVELOPMENT OF AN INDEX OF ALIEN SPECIES INVASIVENESS: AN AID TO ASSESSING RIPARIAN VEGETATION CONDITION |
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Many riparian areas are invaded by alien plant species that negatively affect native species composition, community dynamics and ecosystem properties. We sampled vegetation along ...
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DEVELOPMENT OF DIAGNOSTIC INDICATORS OF STREAM IMPAIRMENT DUE TO NUTRIENTS |
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A comprehensive regional database is being constructed covering EPA Region V and surrounding states which includes data on discharge, water quality, biological condition, habitat m...
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DEVELOPMENT OF DURATION-CURVE BASED METHODS FOR QUALIFYING VARIABILITY AND CHANGE IN WATERSHED HYDROLOGY AND WATER QUALITY |
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During the past decades, U.S. Environmental Protection Agency (EPA), U.S. Department of Agriculture (USDA) and other Federal program administrative and regulatory agencies spent co...
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DEVELOPMENT OF PROTOCOLS AND DECISION SUPPORT TOOLS FOR ASSESSING WATERSHED SYSTEM ASSIMILATIVE |
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Investigations are underway on Lake Texoma, a Corps of Engineers lake on the Oklahoma/Texas border, to develop decision support tools and information to evaluate the transport and ...
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DEVELOPMENT OF PROTOCOLS AND DECISION SUPPORT TOOLS FOR ASSESSING WATERSHED SYSTEM ASSIMILATIVE CAPACITY (SAC), IN SUPPORT OF RISK-BASED ECOSYSTEM MANAGEMENT/RESTORATION PRACTICES |
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The National Risk Management Research Laboratory (NRMRL) has instituted a program for Risk Management Research for Ecosystem Restoration in Watersheds. This program is one compone...
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DEVELOPMENT OF WATER SUPPLY TECHNOLOGY TO MEET THE REQUIREMENTS OF THE U.S. SAFE DRINKING WATER ACT: TRENDS AND PROSPECTS |
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the passage of the US SDWA in 1974 has had a major impact on the way water is treated and delivered in the US. The Act established national drinking water regulations for more than...
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DIAGNOSING CAUSES OF NATIVE FISH AND MUSSEL SPECIES DECLINE IN THE CLINCH AND POWELL RIVER WATERSHED, VIRGINIA, USA. |
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The free-flowing Clinch and Powell watershed in Virginia, USA harbors a high number of endemic mussel and fish species but they are declining or going extinct at an alarming rate. ...
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DIAGNOSING THE CAUSES OF BIOLOGICAL IMPAIRMENT IN MOBILE BAY, ALABAMA |
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Mobile Bay is the fourth largest estuary in the conterminous U.S. with a watershed of more than 43,000 square miles. Biological condition in Mobile Bay has been assessed annually ...
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DIAGNOSTIC INDICATORS OF STREAM IMPAIRMENT AS A RESULT OF NUTRIENTS |
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The main goal of this project is to provide information needed by States to set nutrient criteria at a level appropriately protective of their water bodies' aquatic life uses. The ...
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DIATOM INDICATORS OF TOTAL PHOSPHORUS, SEDIMENTS, AND WATERSHED FOREST COVER IN LAKE MICHIGAN COASTAL, RIVERINE WETLANDS |
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Diatom assemblages are being investigated as response and diagnostic indicators as part of our Great Lakes coastal wetlands research designed to support the development of nutrient...
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DIATOM INDICES OF STREAM ECOSYSTEM CONDITIONS: COMPARISON OF GENUS VS. SPECIES LEVEL IDENTIFICATIONS |
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Diatom assemblage data collected between 1993 and 1995 from 233 Mid-Appalachian streams were used to compare indices of biotic integrity based on genus vs. species level taxonomy. ...
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DIATOM RELATIONSHIPS TO ENVIRONMENTAL VARIABLES IN STREAMS IN THE WESTERN LAKE SUPERIOR BASIN |
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Diatom relationships to reach, habitat, and landscape variables in 46 2nd and 3rd order streams were explored with the Western Lake Superior Basin of the Northern Lakes and Forest ...
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DINOFLAGELLATE CYST RECORD AND HUMAN DISTURBANCE IN NEW BEDFORD HARBOR, MA AND NARRAGANSETT BAY ESTUARIES |
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We studied the dinoflagellate cyst records in sediments from New Bedford Harbor and Apponagansett Bay over the last 350 yr provides to determine if cysts are sensitive to environme...
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DINOFLAGELLATE CYST RECORDS AND HUMAN DISTURBANCE IN TWO NEIGHBORING ESTUARIES, NEW BEDFORD HARBOR AND APPONAGANSETT BAY, MASSACHUSETTS, USA |
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The dinoflagellate cyst records in sediments from New Bedford Harbor and Apponagansett Bay demonstrate sensitivity to environmental change caused by human activity in the watershed...
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DIRECT/DELAYED RESPONSE PROJECT: DEFINITION OF SAMPLING CLASSES AND SELECTION OF SAMPLING SITES FOR THE NORTHEAST |
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The Direct/Delayed Response Project (DDRP) has been designed and implemented by the U.S. Environmental Protection Agency to estimate the number of surface waters (lakes, streams) t...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS & QUALITY ASSURANCE REPORT FOR ADDITIONAL WATERSHED MAPPING IN THE NE USA |
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This report documents the second (additional) mapping program of the Direct/Delayed Response Project (DDRP) in the Northeastern United States. his survey of additional watersheds w...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS & QUALITY ASSURANCE REPORT FOR WATERSHED MAPPING IN THE MID-APPALACHIAN REGION, USA |
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This report documents the mapping program of the Direct/Delayed Response Project (DDRP) in the Mid-Appalachian Region of the United States. he objectives of this report are to docu...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS AND QUALITY ASSURANCE REPORT FOR SOIL SAMPLING AND PREPARATION IN THE NORTHEASTERN UNITED STATES. VOLUME 1. SAMPLING |
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The Direct/Delayed Response Project Soil Survey includes the mapping, characterization, sampling, preparation, and analysis of soils in order to assess watershed response to acidic...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS AND QUALITY ASSURANCE REPORT FOR SOIL SAMPLING AND PREPARATION IN THE NORTHEASTERN UNITED STATES. VOLUME 2. PREPARATION |
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The Direct/Delayed Response Project Soil Survey includes the mapping, characterization, sampling, preparation, and analysis of soils in order to assess watershed response to acidic...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS AND QUALITY ASSURANCE REPORT FOR SOIL SAMPLING AND PREPARATION IN THE SOUTHERN BLUE RIDGE PROVINCE OF THE UNITED STATES. VOLUME 1. SAMPLING |
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The Direct/Delayed Response Project Soil Survey includes the mapping, characterization, sampling, preparation, and analysis of soils in order to assess watershed response to acidic...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS AND QUALITY ASSURANCE REPORT FOR SOIL SAMPLING AND PREPARATION IN THE SOUTHERN BLUE RIDGE PROVINCE OF THE UNITED STATES. VOLUME 2. PREPARATION |
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The Direct/Delayed Response Project Soil Survey includes the mapping, characterization, sampling, preparation, and analysis of soils in order to assess watershed response to acidic...
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DIRECT/DELAYED RESPONSE PROJECT: FIELD OPERATIONS AND QUALITY ASSURANCE REPORT FOR SOIL SAMPLING IN THE MID-APPALACHIAN REGION OF THE UNITED STATES |
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The Direct/Delayed Response Project (DDRP) has been designed and implemented by the U.S. nvironmental Protection Agency to reduce uncertainties in current understanding of the effe...
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DIRECT/DELAYED RESPONSE PROJECT: MID-APPALACHIAN SOIL CORRELATION AND SAMPLING CLASS DEVELOPMENT WORKSHOP |
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The Direct/Delayed Response Project (DDRP) has been designed and implemented by the U.S. Environmental Protection Agency to estimate the number of surface waters (lakes, streams) i...
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DIRECT/DELAYED RESPONSE PROJECT: QUALITY ASSURANCE PLAN FOR SOIL SAMPLING, PREPARATION, AND ANALYSIS |
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The Direct/Delayed Response Project (DDRP) focuses on regions of the United States that have been identified as potentially sensitive to surface water acidification. The Northeaste...
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DISSOLVED ORGANIC CARBON (DOC) CONCENTRATIONS IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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Dissolved organic matter (DOM) supports microbial activity and contributes to transport of N and P in streams. We have studied the impact of land uses on dissolved organic carbon (...
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DISSOLVED ORGANIC CARBON AND DISSOLVED CARBON DIOXIDE CONCENTRATIONS AND EXPORT IN GEORGIA PIEDMONT HEADWATER STREAMS |
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The South Fork Broad River (SFBR) drains about 550 km2 of the Georgia Piedmont. The SFBR watershed is primarily rural and undeveloped although the human population increased by ab...
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DISTINGUISHING AND QUANTIFYING NATURAL AND ANTHROPOGENIC NUTRIENT LOADING TO PACIFIC NORTHWEST ESTUARIES |
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Many coastal ecosystems are experiencing environmental problems due to excess nutrients, particularly nitrogen. Identifying the sources of dissolved inorganic nitrogen (DIN) in es...
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DISTINGUISHING BETWEEN WATERSHEDS AND ECOREGIONS |
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In an effort to adopt more holistic ecosystem approaches to resource assessment and management, many state and federal agencies have begun using watershed or ecoregion frameworks. ...
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DISTRIBUTION AND QUALITY OF SEAGRASS MEADOWS IN THE PENSACOLA BAY SYSTEM |
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Abstract for oral presentation: Seagrass meadows have 22 ecological benefits and have an estimated value of $20,500 per acre in Florida. Seagrass meadows support a variety of marin...
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DISTRIBUTION OF MERCURY IN USEPA REGION IX R-EMAP STUDY AREAS |
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Mercury distribution within U .S. EP A Region IX Regional Environmental Monitoring and Assessment Program (R-EMAP) study units is associated with geology and land-use practices. St...
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DISTRIBUTION OF SEDIMENT MERCURY CONCENTRATIONS IN THE HUMBOLDT RIVER WATERSHED |
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In 1998 the United States Environmental Protection Agency (USEPA) required the mining industry to list all releases to the environment exceeding the Toxic Release Inventory...
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DISTRIBUTIONS OF LAKE FISHES OF THE NORTHEAST USA--III. SALMONIDAE AND ASSOCIATED COLDWATER SPECIES |
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We present distributional maps and discuss native status for fish species characteristic of coldwater lakes, sampled from 203 randomly selected lakes in the northeastern USA (New E...
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DNA ANALYSIS OF FECAL INDICATOR BACTERIA: ITS USES AND LIMITATIONS IN WATERSHED PLANNING |
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Although water quality of the Nation's lakes, rivers and streams has been monitored for many decades, particularly since the passage of the Clean Water Act (1972), many still do ...
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DNA BASED MOLECULAR METHODS FOR BACTERIAL SOURCE TRACKING IN WATERSHEDS |
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Point and non-point pollution sources of fecal pollution on a watershed adversely impact the quality of drinking source waters and recreational waters. States are required to de...
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DO POST-MINING CONSTRUCTED CHANNELS REPLACE FUNCTIONAL ATTRIBUTES OF HEADWATER STREAMS? |
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Mountaintop removal and valley filling is a method for mining coal in the Appalachians. Surface coal mining regulations currently recognize constructed drainage ditches associated ...
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DOES DEMOGRAPHIC KNOWLEDGE MATTER? RESULTS OF A POLL IN THE NEW YORK CITY WATERSHED (R823466) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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DOTAGWA: A CASE STUDY IN WEB-BASED ARCHITECTURES FOR CONNECTING SURFACE WATER MODELS TO SPATIALLY ENABLED WEB APPLICATIONS |
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The Automated Geospatial Watershed Assessment (AGWA) tool is a desktop application that uses widely available standardized spatial datasets to derive inputs for multi-scale hydrolo...
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Delineating resource sheds in aquatic ecosystems (presentation) |
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Analysis of spatially-explicit ecological phenomena in aquatic ecosystems is impeded by a lack of knowledge of, and tools to delimit, spatial patterns of material supply to point l...
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Determining the Ecosystem Services Important for Urban Landscapes |
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Urban ecosystems present special considerations and challenges in researching and evaluating ecosystem functions and services. A case study of nitrate retention and loss in forest...
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Determining the Ecosystem Services Important for Urban Landscapes-Slides |
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This presentation consists of introductory slides on ecosystem services in urban landscapes and then a discussion of two case studies concerning the provision of water quality in u...
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E-ESTUARY: A PROPOSED WEB-BASED FRAMEWORK FOR ENVIRONMENTAL DECISION-MAKING |
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poster presentation at an EPA Watershed Workshop...
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ECOLOGICAL ASSESSMENTS IN ECOSYSTEM MANAGEMENT |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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ECOLOGICAL CLASSIFICATION ISSUES AND RESEARCH |
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Purposes and need for ecological classification will be discussed. Some brief examples will highlight regional and watershed approaches, general issues of extrapolation and classif...
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ECOLOGICAL CRITERIA FOR PRIORITIZATION OF CULVERT REPLACEMENT |
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Culvert passage issues are gaining national and international focus, because they are implicated in the decline of particular species and in the more general loss of biodiversity i...
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ECOLOGICAL ENDPOINTS IN WATERSHED MANAGEMENT |
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Slide presentation for the NATO CCMS Pilot Study 5 Workshop in Istanbul Turkey, October 2007....
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ECOLOGICAL RECOVERY AFTER RECLAMATION OF TOXIC SPOILS LEFT BY COAL SURFACE MINING. PHASE 1: A BASELINE ASSESSMENT OF ENVIRONMENTAL CONDITIONS PRIOR TO APPLICATION OF INTENSIVE REMEDIAL TREATMENTS |
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This study involves a selected watershed in which surface mining and unsuccessful reclamation efforts in the early 1970's resulted in adverse environmental impacts. Work on the eas...
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ECOLOGICAL RECOVERY AFTER RECLAMATION OF TOXIC SPOILS LEFT BY COAL SURFACE MINING. PHASE 2. AN ASSESSMENT OF ENVIRONMENTAL CHANGES FOLLOWING INTENSIVE REMEDIAL TREATMENTS |
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The study involves a selected watershed in which surface mining and unsuccessful reclamation efforts in the early 1970s resulted in adverse environmental impacts. Work on the east ...
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ECOLOGICAL RISK ASSESSMENT FOR THE MIDDLE SNAKE RIVER, IDAHO |
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An ecological risk assessment was completed for the Middle Snake River, Idaho. In this assessment, mathematical simulations and field observations were used to analyze exposure an...
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ECOLOGICAL RISK ASSESSMENT WORKSHOP |
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As ecological risk assessment evolves, it is moving beyond focus on single species toward addressing multiple species and their interactions, and from assessing effects of simple c...
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ECOLOGICAL RISK ASSESSMENT: PROTECTING NORTHWEST ANADROMOUS SALMONID STOCKS |
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Ecological risk assessment is usually defined as the process that evaluates the likelihood that adverse ecological effects are occurring, or may occur, as a result of exposure to o...
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ECOLOGICALLY-RELEVANT QUANTIFICATION OF STREAMFLOW REGIMES IN WESTERN STREAMS |
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This report describes the rationale for and application of a protocol for estimation of ecologically-relevant streamflow metrics that quantify streamflow regime for ungaged sites s...
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ECONOMIC AND ENVIRONMENTAL IMPLICATIONS OF ALTERNATIVE LANDSCAPE DESIGNS IN THE WALNUT CREEK WATERSHED OF IOWA. (R825335) |
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This paper evaluates the economic and environmental impacts of three alternative landscape scenarios created by a team of landscape architects, following input from an interdisc...
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ECOREGIONAL INFLUENCES ON WATERSHED LAND COVER, WATER QUALITY, AND IN-STREAM BIOLOGY |
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Omernik's ecoregions were developed to serve as a spatial framework for environmental monitoring and research. We examined the biology and chemistry in 35 headwater streams in the...
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ECOSYSTEM RESPONSES TO ALTERNATIVE PESTICIDES IN THE TERRESTRIAL ENVIRONMENT: A SYSTEM APPROACH |
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A conceptual model was developed to describe aspects of the fate and effects of a pesticide in an orchard ecosystem. In order to refine, parameterize, and test a mathematical model...
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ECOSYSTEM RESPONSES TO INTERNAL AND WATERSHED ORGANIC MATTER LOADING: CONSEQUENCES FOR HYPOXIA IN THE EUTROPHYING NEUSE RIVER ESTUARY, NORTH CAROLINA, USA. (R825243) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ECOSYSTEM RESTORATION RESEARCH THROUGH THE NATIONAL RISK MANAGEMENT RESEARCH LABORATORY (NRMRL) |
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The Ecosystem Restoration Research Program underway through ORD's National Risk Management Research Laboratory (NRMRL) has the long-term goal of providing watershed managers with "...
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ECOSYSTEM RESTORATION: MANAGEMENT PRACTICES FOR PROTECTING AND ENHANCING AQUATIC RESOURCES |
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This poster describes research that addresses the question: Which management practices are most successful for protection and restoration of ecological resources?
The Ecosystem Re...
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ECOSYSTEM RESTORATION: PRIORITIZATION TO ACHIEVE EMERGENT BENEFITS |
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The declining ability of ecosystems to support themselves and the demands placed on them is not new. Initial efforts to counteract these effects and trends focused on individual s...
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ECOSYSTEM SERVICES AS A NEW STRATEGIC FOCUS FOR USEPA'S ECOLOGICAL RESEARCH PROGRAM |
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The USEPA's Office of Research and Development has made ecosystem services the new strategic focus for its ecological research program (ERP). Recognizing that the protection and en...
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EDUCATING THE PUBLIC ABOUT ON-SITE WASTEWATER TREATMENT SYSTEM MAINTENANCE AND WATERSHED PROTECTION (R823466) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EDUCATIONAL OUTREACH PRESENTATION |
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Exotic species have had major impacts on the ecology of the Great Lakes ecosystem. Different state, private, and Federal agencies have addressed the problem by conducting research ...
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EFFECT OF A WHOLE-CATCHMENT N ADDITION ON STREAM DETRITUS PROCESSING |
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The Bear Brook Watershed in Maine (BBWM) is a paired catchment study investigating ecosystem effects of N and S deposition. Because of the decade long (NH4)2SO4 addition, the treat...
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EFFECT OF ACID TREATMENT ON DISSOLVED ORGANIC CARBON RETENTION BY A SPODIC HORIZON |
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Processes involving the movement of organic substances in forest soils are not well understood. This study was conducted to examine the role of acidic inputs on dissolved organic c...
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EFFECT OF AGRICULTURAL LAND USE PRACTICES ON STREAM WATER QUALITY: ECONOMIC ANALYSIS |
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Effective management of agricultural nonpoint source pollution requires that economically feasible land use practices be selected and implemented. Since non-point source pollution ...
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EFFECT OF GEOMORPHOLOGIC RESOLUTION ON MODELING OF RUNOFF HYDROGRAPH AND SEDIMENTOGRAPH OVER SMALL WATERSHEDS |
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In hydrologic models GIS interfaces are commonly used for extracting the channel network, and delineating the watershed. By overlaying soil and land use maps onto the extracted cha...
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EFFECT OF LAND USE CHANGE ON WATERSHED HYDROLOGY. (R827149) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECT OF SNOWMELT ON THE WATER QUALITY OF FILSON CREEK AND OMADAY LAKE, NORTHEASTERN MINNESOTA |
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Sulfate concentration and pH were determined in surface water, groundwater and precipitation samples collected in the Filson Creek watershed to evaluate the sources of sulfate in F...
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EFFECT OF URBANIZATION ON SUSTAINABILITY OF WATER RESOURCES IN THE POCONO CREEK WATERSHED |
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Understanding the effects of population growth and urbanization on the hydrologic balance of the watershed is of paramount importance for sustainable water resources management. Th...
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EFFECT OF URBANIZATION ON SUSTAINABILITY OF WATER RESOURCES IN THE POCONO CREEK WATERSHED |
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Understanding the effects of population growth and urbanization on the hydrologic balance of the watershed is of paramount importance for sustainable water resources management. Th...
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EFFECTIVENESS OF LARGE WOODY DEBRIS IN STREAM REHABILITATION PROJECTS IN URBAN BASINS. (R825284) |
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Urban stream rehabilitation projects commonly include log placement to establish the types of habitat features associated with large woody debris (LWD) in undisturbed streams. S...
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EFFECTIVENESS OF STREAM AND RIPARIAN RESTORATION IN THE MID-ATLANTIC REGION |
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The USEPA-ORD-GWERD has research projects in several locations in the Mid-Atlantic in progress to evaluate the effectiveness of stream and riparian restoration, including Mine Bank...
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EFFECTS OF ACIDIC DEPOSITION ON STREAMS IN THE APPALACHIAN MOUNTAINS AND PIEDMONT REGION OF THE MID-ATLANTIC UNITED STATES |
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Streams in the Appalachian Mountain area of the Mid-Atlantic receive some of the largest acidic deposition loadings of any region of the United States. ompilation of survey data fr...
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EFFECTS OF ACIDIC PRECIPITATION ON THE WATER QUALITY OF STREAMS IN THE LAUREL HILL AREA, SOMERSET COUNTY, PA, 1983-1986 |
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Five headwater streams in the Laurel Hill area in southwestern Pennsylvania were investigated from September 1983 through February 1986 to determine possible effects of acidic prec...
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EFFECTS OF AGRICULTURAL ACTIVITIES AND BEST MANAGEMENT PRACTICES ON WATER QUALITY OF SEASONAL PRAIRIE POTHOLE WETLANDS |
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Long-term effectsof within-basin tillage can constrain condition and function of prairie wetlands even after uplands are restored. Runoff was significantly greater to replicate wet...
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EFFECTS OF AGRICULTURE ON STREAM FAUNA IN CENTRAL INDIANA |
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From 1978 through 1980 the benthic macroinvertebrate and fish communities of three steam systems in Central Indiana were examined. The objective of this study was to describe the o...
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EFFECTS OF CLIMATE VARIABILITY ON NITROGEN FLUXES FROM SELECTED WATERSHEDS ALONG THE US EAST COAST |
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To anticipate vulnerabilities of coastal ecosystems to global climate change, a better understanding is needed of factors affecting current and past nitrogen fluxes from watersheds...
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EFFECTS OF COPPER ON COMMUNITY, FUNCTIONAL, AND BEHAVIORAL ENDPOINTS IN AN ARTIFICIAL STREAM STUDY |
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A study of the effects of copper on biota and behavioral endpoints was carried out at the U.S. EPA's Experimental Stream Facility (ESF), Milford OH. The objective of the study was ...
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EFFECTS OF DISTURBANCE ON NITROGEN EXPORT FROM FORESTED LANDS OF THE CHESAPEAKE BAY WATERSHED. (R826110) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EFFECTS OF FLOW REGIME ON THE ECOLOGY OF EXPERIMENTAL CHANNELS SIMULATING PRE-DEVELOPMENT AND MANAGED POST-DEVELOPMENT CONDITIONS |
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Best management practices (BMPs) are placed in streams or watersheds to mitigate the effects of hydrological, chemical, or physical stressors resulting from anthropogenic activitie...
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EFFECTS OF HABITAT DEGRADATION ON BIOLOGICAL ENDPOINTS IN THE SOUTH FORK BROAD RIVER BASIN, GEORGIA |
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Many of the streams of the lower Piedmont ecoregion in Georgia have been negatively impacted to some degree by habitat degradation due primarily to sedimentation. The South Fork of...
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EFFECTS OF HABITAT DISTURBANCE FROM RESIDENTIAL DEVELOPMENT ON BREEDING BIRD COMMUNITIES IN RIPARIAN CORRIDORS |
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This study was conducted to assess the relationship of land use, riparian vegetation, and avian populations. Our objective was to compare indicators of condition for vegetated ripa...
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EFFECTS OF HYDROGEOMORPHIC REGION, CATCHMENT STORAGE, AND MATURE FOREST ON BASEFLOW AND SNOWMELT STREAM WATER QUALITY IN SECOND-ORDER LAKE SUPERIOR BASIN TRIBUTARIES |
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In this study we predict stream sensitivity to nonpoint source pollution based on the nonlinear responses of hydrologic regimes and associated loadings of nonpoint source pollutan...
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EFFECTS OF HYDROGEOMORPHIC REGION, WATERSHED STORAGE, AND FOREST FRAGMENTATION ON WATERSHED EXPORTS |
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Turbidity was highest for South Shore streams overall, but exhibited a significant HGM x storage x fragmentation effect, with highest levels observed in South Shore low storage/hig...
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EFFECTS OF HYDROLOGY ON NITROGEN PROCESSING IN A RESTORED URBAN STREAM |
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In 2001, EPA undertook an intensive research effort to evaluate the impact of stream restoration on water quality at a degraded stream in an urban watershed. An essential piece of...
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EFFECTS OF LAND USE AND SEASON ON MICROORGANISM CONCENTRATIONS IN URBAN STORMWATER RUNOFF |
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This study investigated differences in pathogen and indicator organism concentrations in stormwater runoff between different urban land uses and seasons. Stormwater samples collec...
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EFFECTS OF LAND USE AND SEASON ON MICROORGANISM CONCENTRATIONS IN URBAN STORMWATER RUNOFF |
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This study investigated differences in pathogen and indicator organism concentrations in stormwater runoff between different urban land uses and seasons. Stormwater samples collec...
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EFFECTS OF REPEATED AMMONIUM SULFATE APPLICATION ON SOIL LEACHAGE CHEMISTRY ON THE FERNOW EXP. FOREST, WEST VIRGINIA, USA |
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In 1987, the U.S. Forest Service and the U.S. Environmental Protection Agency began a cooperative study to examine the effects of acidification to various ecosystem parameters. mmo...
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EFFECTS OF SAMPLE HOLDING TIME ON CONCENTRATIONS OF MICROORGANISMS IN WATER SAMPLES |
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This research investigated the effects of extending the holding time of analysis of microorganisms beyond the standard holding time of 24H for investigational purposes such as wate...
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EFFECTS OF SCALE ON LAND USE AND WATER QUALITY RELATIONSHIPS: A LONGITUDINAL BASIN-WIDE PERSPECTIVE |
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Human land use is a major source of change in catchments in developing areas. To better anticipate the long-term effects of growth, land use planning requires estimates of how cha...
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EFFECTS OF SPATIAL EXTENT ON LANDSCAPE STRUCTURE AND SEDIMENT METAL CONCENTRATION RELATIONSHIPS IN SMALL ESTUARINE SYSTEMS OF THE US MID-ATLANTIC COAST |
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Prior studies exploring the quantitative relationship between landscape structure metrics and the ecological condition of receiving waters have used a variety of sampling units (e....
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EFFECTS OF STREAM RESTORATION ON DENITRIFICATION In AN URBANIZING WATERSHED |
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Increased delivery of nitrogen due to urbanization and stream ecosystem degradation is contributing to eutrophication in coastal regions of the eastern United States. We tested whe...
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EFFECTS OF STREAM RESTORATION ON GROUND WATER NITRATE AT MINEBANK RUN, AN URBAN STREAM IN THE CHESAPEAKE BAY WATERSHED |
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Elevated nitrate levels in streams and ground water pose human and ecological threats. Microbial denitrification removes nitrate from ground water but requires anaerobic (saturat...
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EFFECTS OF STREAM RESTORATION ON IN-STREAM WATER QUALITY IN AN URBAN WATERSHED |
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The purpose of this on-going project is to provide information to Municipal Separate Storm Sewer System (MS4s) operators and states on the performance of selected best management p...
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EFFECTS OF STREAM RESTORATION ON IN-STREAM WATER QUALITY IN AN URBAN WATERSHED |
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The purpose of this on-going project is to provide information to Municipal Separate Storm Sewer System (MS4s) operators and states on the performance of selected best management p...
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EFFECTS OF URBANIZATION AND STORMWATER RUNOFF ON THE FOOD QUALITY IN TWO SALMONID STREAMS |
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The effects that urbanization and stormwater runoff have on the physical and chemical conditions in natural streams have been well documented. Altered land usage in the watershed r...
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EFFECTS OF WATERSHED DISTURBANCE ON SMALL STREAMS |
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This presentation presents the effects of watershed disturbance on small streams. The South Fork Broad River Watershed was studied to evaluate the use of landscape indicators to pr...
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EMAP-VIRGINIAN PROVINCE FOUR YEAR ASSESSMENT (1990-1993) |
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Assessments with the four years (1990-93) of ecological condition data collected by the USEPA Environmntal Monitoring and Assessment Program (EMAP) in estuaries of the Virginian Bi...
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EMAP-WEST COMMUNICATIONS, MONITORING THE CONDITIONS OF SURFACE WATERS IN THE WESTERN U.S. - (ONE PAGE FACT SHEET) |
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The Challenge...and Opportunity
The Clean Water Act (Section 305b) requires the Environmental Protection Agency to report biennially on the status of water quality throughout th...
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EMERGY METHODS: VALUABLE INTEGRATED ASSESSMENT TOOLS |
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NHEERL's Atlantic Ecology Division is investigating emergy methods as tools for integrated assessment in several projects evaluating environmental impacts, policies, and alternativ...
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EMPIRICAL MODELS FOR LAKE ACIDIFICATION IN THE UPPER GREAT LAKES REGION |
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A large data base on inland lakes in the Upper Great Lakes Region (UGLR) was used to evaluate assumptions and relationships of empirical acidification models. Improved methods to c...
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ENHANCED RECOVERY METHODS FOR 85KR AGE-DATING GROUNDWATER: ROYAL WATERSHED, MAINE |
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Potential widespread use of 85Kr, having a constant input function in the northern hemisphere, for groundwater age-dating would advance watershed investigations. The cur...
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ENHANCING HSPF MODEL CHANNEL HYDRAULIC REPRESENTATION |
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The Hydrological Simulation Program - FORTRAN (HSPF) is a comprehensive watershed model, which employs depth-area-volume-flow relationships known as hydraulic function table (FTABL...
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ENHANCING HYDROLOGICAL SIMULATION PROGRAM - FORTRAN MODEL CHANNEL HYDRAULIC REPRESENTATION |
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The Hydrological Simulation Program– FORTRAN (HSPF) is a comprehensive watershed model that employs depth-area - volume - flow relationships known as the hydraulic function table (...
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ENVIRONMENTAL AND GEOGRAPHICAL FACTORS CONTRIBUTING TO CONTAMINATION OF WATERSHED WITH CRYPTOSPORIDIUM PARVUM OOCYSTS. (R824995) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ENVIRONMENTAL AND GEOGRAPHICAL FACTORS CONTRIBUTING TO WATERSHED CONTAMINATION WITH CRYPTOSPORIDIUM PARVUM OOCYSTS. (R824995) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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ENVIRONMENTAL ISOTOPES FOR RESOLUTION OF HYDROLOGY PROBLEMS |
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The use of environmental isotopes as tracers in the hydrosphere is increasing as analytical instrumentation improves and more applications are discovered. There exists still miscon...
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ENVIRONMENTAL PROBLEM SOLVING WITH GEOGRAPHIC INFORMATION SYSTEMS: 1994 AND 1999 CONFERENCE PROCEEDINGS |
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These two national conferences, held in Cincinnati, Ohio in 1994 and 1999, addressed the area of environmental problem solving with Geographic Information Systems. This CD-ROM is a...
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ENVIRONMENTAL QUALITY AND LANDSCAPE-RISK ASSESSMENT IN THE YANTRA RIVER BASIN |
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Landscape characteristics exert their impact on the processes occurring in river basins in many directions and may influence in a different way the environmental security and some ...
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ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS |
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The Environmental Research Laboratory - Corvallis is the U.S. Environmental Protection Agency's - national research center for terrestrial and watershed ecology, aquatic ecoregions...
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ENVIRONMENTAL RESTORATION AND PROTECTION STRATEGIES AT MULTIPLE SCALES IN RHODE ISLAND WATERSHEDS |
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Public concerns for the environment are often the basis for environmental regulations. The Clean Water Act seeks to ensure that water quality and quantity fully support aquatic lif...
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ENVIRONMENTAL RESTORATION AND PROTECTION STRATEGIES AT MULTIPLE SCALES IN RI WATERSHEDS |
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EP A New England, in cooperation with New England states, natural resource specialists, and stakeholders has adopted an approach to help identify areas of healthy natural resources...
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ENVIRONMENTAL STRESS AND RECOVERY: THE GEOCHEMICAL RECORD OF HUMAN DISTURBANCE IN NEW BEDFORD HARBOR AND APPONAGANSETT BAY, MASSACHUSETTS (USA) |
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To restore and maintain chemical, physical, and biological integrity of the nation's waters, knowledge of the characteristics of unimpaired water bodies and their watersheds is re...
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ENVIRONMENTAL SYSTEMS MANAGEMENT AS APPLIED TO WATERSHEDS, UTILIZING REMOTE SENSING, DECISION SUPPORT AND VISUALIZATION |
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Environmental Systems Management as a conceptual framework and as a set of interdisciplinary analytical approaches will be described within the context of sustainable watershed man...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: EVALUATION OF THE XP-SWMM STORMWATER WASTEWATER MANAGEMENT MODEL, VERSION 8.2, 2000, FROM XP SOFTWARE, INC. |
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XP-SWMM is a commercial software package used throughout the United States and around the world for simulation of storm, sanitary and combined sewer systems. It was designed based ...
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ENVIRONMENTAL TECHNOLOGY VERIFICATION: DEVELOPMENT OF A PROTOCOL FOR TESTING COMMERCIALLY PRODUCED STORMWATER TREATMENT DEVICES |
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Over the past decade, there has been an increasing array of commercially available products for the treatment of nonpoint source pollution from urban stormwater. These products in...
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EPA SCIENCE FORUM 2005, WASHINGTON, DC: ASSESSING NEW ENGLAND COATAL WETLANDS USING A SYSTEMATIC REFERENCE-BASED APPROACH |
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The US Environmental Protection Agency, Atlantic Ecology Division is working collaboratively with Massachusetts Coastal Zone Management to implement landscape and rapid assessments...
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EPA SCIENTISTS PARTICIPATE IN THE SRA 2005 ANNUAL MEETING |
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Several NCEA Scientists will be presenting at this years Society For Risk Analysis (SRA) Annual Meeting (see other sources for the SRA meeting agenda). The meet...
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EPA ’s ECOLOGICAL MODELS FOR INTEGRATED WATERSHED MANAGEMENT |
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Aquatic ecological populations and communities are affected by the nature and quality of the water in which they live. Specific factors that affect instream biota include chemical ...
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EPA'S URBAN RESEARCH PROGRAM IN BMPS AND RESTORATION FOR WATER QUALITY IMPROVEMENT |
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The Urban Watershed Management Branch is responsible for developing, and demonstrating technologies and methods required to manage the risk to public health, property and the envir...
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EPA'S URBAN RESEARCH PROGRAM IN BMPS AND RESTORATION FOR WATER QUALITY IMPROVEMENT |
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The Urban Watershed Management Branch is responsible for developing, and demonstrating technologies and methods required to managing the risk to public health, property and the env...
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EPA'S WATERSHED MANAGEMENT AND MODELING RESEARCH PROGRAM |
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Watershed management presumes that community groups can best solve many water quality and ecosystem problems at the watershed level rather than at the individual site, receiving ...
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EPISODIC ACIDIFICATION OF ADIRONDACK LAKES DURING SNOWMELT |
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Maximum values of acid neutralizing capacity (ANC) in Adirondack, New York lake outlets generally occur during summer and autumn. During spring snowmelt, transport of acidic water ...
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EQUITY ANALYSIS IN PUBLIC POLICY FORMATION |
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As environmental controls become more costly to implement and the penalties of judgment errors become more severe, environmental quality management requires more efficient manageme...
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ERRATA FOR THE EFFLUENT AND RECEIVING WATER TOXICITY TESTING MANUALS: ACUTE TOXICITY OF EFFLUENTS AND RECEIVING WATERS TO FRESHWATER AND MARINE ORGANISMS, SHORT-TERM METHODS FOR ESTIMATING THE CHRONIC TOXICITY OF EFFLUENTS AND RECEIVING WATERS TO FRESHWATER ORGANISMS, AND SHORT-TERM METHODS FOR ESTIMATING THE CHRONIC TOXICITY OF EFFLUENTS AND RECEIVING WATERS TO MARINE AND ESTUARINE ORGANISMS |
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Preliminary results reveal sharp gradients in nutrient distributions within Lake Superior coastal wetlands and indicate that these ecosystems modify nutrient fluxes from watershed ...
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ESTABLISHING MINIMUM FLOWS AND LEVELS OF FRESHWATER IN THE CALOOSAHATCHEE RIVER, FLORIDA, USING RESPONSES OF OYSTERS. |
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Alterations in freshwater inflow resulting from watershed development and water management practices have impacted salinity and water quality and led to declines in oyster populati...
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ESTIMATED CHANGES IN NATIVE FISH RICHNESS AND THE INDEX OF BIOTIC INTEGRITY IN WILLAMETTE VALLEY STREAMS |
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The landscape of the Willamette Valley differs greatly from that prior to European settlement. Forty-three percent of the Valley Ecoregion has been converted to agricultural uses;...
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ESTIMATING AND PROJECTING IMPERVIOUS COVER |
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Effective methods to estimate and project impervious cover can help identify areas where a watershed is at risk of changing rapidly from one with relatively pristine streams to one...
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ESTIMATING AND PROJECTING IMPERVIOUS COVER IN THE SOUTHEASTERN UNITED STATES |
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Urban/suburban land use is the most rapidly growing land use class. Along with increased development inevitably comes increased impervious surface--areas preventing infiltration o...
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ESTIMATING AND PROJECTING IMPERVIOUS COVER IN THE SOUTHEASTERN UNITED STATES |
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Urban/suburban land use constitutes the fastest growing land use class in the Southeastern United States. Predominant development practices increase impervious surface--areas prev...
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ESTIMATING AND PROJECTING IMPERVIOUS COVER IN THE SOUTHEASTERN UNITED STATES |
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Urban/suburban land constitutes the fastest growing land use class in the Southeastern United States. Predominant development practices increase impervious surface--areas preventi...
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ESTIMATING BIOLOGICAL CONDITION IN ESTUARIES FROM WATERSHED LANDSCAPE CHARACTERISTICS:A CASE STUDY IN PENSACOLA BAY, FLORIDA, USA |
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Abstract for presentation...
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ESTIMATING ENVIRONMENTAL DAMAGES FROM SURFACE MINING OF COAL IN APPALACHIA: A CASE STUDY |
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A coherent methodology for economic valuation of the environmental damage from surface mining is presented in this report. The empirical case study was conducted in the watershed o...
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ESTIMATION OF EXPOSURE CRITERIA VALUES FOR BILIARY POLYCYCLIC AROMATIC HYDROCARBON METABOLITE CONCENTRATION IN WHITE SUCKERS (CATASTOMUS COMMERSONI) |
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A methodology was developed for deriving quantitative exposure criteria useful for comparing a site or a watershed to a reference condition and for defining the occurrence of extre...
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ESTIMATION OF EXPOSURE CRITERIA VALUES FOR BILIARY POLYCYCLIC AROMATIC HYDROCARBON METABOLITE CONCENTRATIONS IN WHITE SUCKERS (CATOSTOMUS COMMERSONI) |
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A methodology was developed for deriving quantitative exposure criteria useful for comparing a site or a watershed to a reference condition and for defining the occurrence of extre...
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ESTIMATION OF TOTAL DISSOLVED NITRATE LOAD IN NATURAL STREAM FLOWS USING AN IN-STREAM MONITOR |
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Estuaries respond rapidly to rain events and the nutrients carried by inflowing rivers such that discrete samples at weekly or monthly intervals are inadequate to catch the maxima ...
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ESTIMATION OF TOTAL DISSOLVED NITRATE LOAD IN NATURAL STREAM FLOWS USING AN IN-STREAM MONITOR |
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Estuaries respond rapidly to rain events and the nutrients carried by inflowing rivers such that discrete samples at weekly or monthly intervals are inadequate to catch the maxima ...
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EUTROPHICATION MODELING CAPABILITIES FOR WATER QUALITY AND INTEGRATION TOWARDS ECOLOGICAL ENDPOINTS |
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A primary environmental focus for the use of mathematical models is for characterization of sources of nutrients and sediments and their relative loadings from large river basins, ...
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EVALUATING AN URBAN STREAM RESTORATION PROGRAM FOR IMPROVING WATER QUALITY, IN-STREAM HABITAT, AND BANK STABILITY |
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To improve water quality in urban and suburban areas, watershed managers often incorporate best management practices (BMPs) to reduce the quantity of runoff, as well as minimize po...
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EVALUATING CUMULATIVE EFFECTS OF DISTURBANCE ON THE HYDROLOGIC FUNCTION OF BOGS, FENS, AND MIRES |
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Few quantitative studies have been done on the hydrology of fens, bogs and mires, and consequently any predictions of the cumulative impacts of disturbances on their hydrologic fun...
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EVALUATING EXPLICIT AND IMPLICIT ROUTING FOR WATERSHED, HYDROECOLOGICAL MODELS OF FOREST HYDROLOGY AT THE SMALL CATCHMENT SCALE. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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EVALUATING PERTUBATIONS AND DEVELOPING RESTORATION STRATEGIES FOR INLAND WETLANDS IN THE GREAT LAKES BASIN |
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Wetland coverage and type distributions vary systematically by ecoregion across the Great Lakes Basin. Land use and subsequent changes in wetland type distributions also vary amon...
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EVALUATING PROBABILITY SAMPLING STRATEGIES FOR ESTIMATING REDD COUNTS: AN EXAMPLE WITH CHINOOK SALMON (Oncorhynchus tshawytscha) |
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Precise, unbiased estimates of population size are an essential tool for fisheries management. For a wide variety of salmonid fishes, redd counts from a sample of reaches are commo...
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EVALUATING THE ACCOTINK CREEK URBAN STREAM RESTORATION PROJECT FOR IMPROVING WATER QUALITY, IN-STREAM HABITAT, AND BANK STABILITY |
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Increased urbanization results in a larger percentage of connected impervious areas and can contribute large quantities of stormwater runoff and significant quantities of debris an...
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EVALUATING THE EFFECT OF UPSTREAM WATERSHED ACTIVITIES ON DOWNSTREAM STREAMFLOW |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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EVALUATING THE EFFECT OF UPSTREAM WATERSHED ACTIVITIES TO DOWNSTREAM STREAMFLOW |
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Linking the impacts of upstream activities such as urban development to changes in downstream streamflow is critical to achieving a balance between economic development and environ...
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EVALUATING THE INTEGRITY OF SALT MARSHES IN NARRAGANSETT BAY SUB-ESTUARIES USING A WATERSHED APPROACH |
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A watershed approach to examine measures of structure and function in salt marshes of similar geomorphology and hydrology in Narragansett Bay is being used to develop a reference s...
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EVALUATING THE INTEGRITY OF SALT MARSHES IN NARRAGANSETT BAY SUBESTUARIES USING A WATESHED APPROACH |
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A watershed approach to examine measures of structure and function in salt marshes of similar geomorphology and hydrology in Narragansett Bay was used to develop a reference system...
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EVALUATING THE RELATIONSHIPS BETWEEN NUTRIENT AND SEDIMENT DYNAMICS, ECOLOGY AND LAND USE IN THE LITTLE MIAMI RIVER WATERSHED |
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The goal of this project, and associated research, is to establish thresholds for ecological response to land use and disturbance in agricultural and mixed land use watersheds with...
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EVALUATING THE RELATIVE ROLES OF ECOLOGICAL REGIONS AND LAND-COVER COMPOSITION FOR GUIDING ESTABLISHMENT OF NUTRIENT CRITERIA |
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The continuing expansion of anthropogenic influence across the continental United States has motivated the establishment of nutrient criteria for streams, lakes, and estuaries as ...
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EVALUATING THE ROLE OF CREATED AND NATURAL WETLANDS IN CONTROLLING NONPOINT SOURCE POLLUTION |
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Nonpoint source (NPS) pollution control and wetlands protection are two overlapping scientific and policy issues of the U.S. Environmental Protection Agency. reated, restored, and ...
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EVALUATING THE WATER QUALITY EFFECTIVENESS OF WATERSHED-SCALE SOURCE WATER PROTECTION PROGRAMS |
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The US EPA Office of Research and Development, the Ohio River Valley Water Sanitation Commission (ORSANCO) and the Upper Big Walnut Creek Quality Partnership created a collaborativ...
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EVALUATION OF A COASTAL GOLF COMPLEX AS A LOCAL AND WATERSHED SOURCE OF BIOAVAILABLE |
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Lewis, Michael A., Robert L. Quarles, Darrin D. Dantin and James C. Moore. 2004. Evaluation of a Coastal Golf Complex as a Local and Watershed Source of Bioavailable Contaminants. ...
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EVALUATION OF CONSTRUCTED WETLAND AND RETENTION POND BMPS FOR ATTENUATING MICROBIAL CONTAMINANTS IN URBAN STORMWATER RUNOFF - 2005 |
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The goal of the EPA is to protect human health, ensure the safety of drinking and recreational waters, support economic and recreational activities, and provide healthy habitat for...
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EVALUATION OF CRYPTOSPORIDIUM OOCYSTS AND GIARDIA CYSTS IN A WATERSHED RESERVOIR |
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This investigation evaluated the occurrence of Cryptosporidium oocysts and Giardia cysts at 17 sampling locations in Lake Texoma reservoir using method 1623 with standard Enviroche...
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EVALUATION OF ECONOMIC INCENTIVES FOR DECENTRALIZED STORMWATER RUNOFF MANAGEMENT |
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Impervious surfaces in urban and suburban areas can lead to excess stormwater runoff throughout a watershed, typically resulting in widespread hydrologic and ecological alteration ...
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EVALUATION OF MANAGEMENT TOOLS IN THE OCCOQUAN WATERSHED |
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During the period May, 1979-May 1981, nine water quality monitoring stations were operated in small catchments in the Occoquan Watershed of Northern Virginia. The study sites incor...
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EVALUATION OF MULTIPLE AQUATIC BIOMONITORS FOR SOURCE WATER PROTECTION |
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A variety of probes for use in continuous monitoring of water quality exist. They range from single parameter chemical/physical probes to comprehensive screening systems based on ...
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EVALUATION OF RETENTION POND AND CONSTRUCTED WETLAND BMPS FOR TREATING PARTICULATE-BOUND HEAVY METALS IN URBAN STORMWATER RUNOFF |
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Urban stormwater discharge during wet-weather flows is a major contributor to the pollution of many receiving waters. Heavy metals are of particular interest in stormwater runoff d...
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EVALUATION OF RETENTION POND AND CONSTRUCTED WETLAND BMPS FOR TREATING PARTICULATE-BOUND HEAVY METALS IN URBAN STORMWATER RUNOFF |
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The sources of heavy metals in urban stormwater runoff are numerous (e.g., highways, road surfaces, roofs) and the release of metals into the environment is governed by several com...
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EVALUATION OF RETENTION POND AND CONSTRUCTED WETLAND BMPS FOR TREATING PARTICULATE-BOUND HEAVY METALS IN URBAN STORMWATER RUNOFF - 2007 |
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The sources of heavy metals in urban stormwater runoff are diverse (e.g., highways, road surfaces, roofs) and the release of metals into the environment is governed by several comp...
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EVALUATION OF SEDIMENT AND PHOSPHORUS MANAGEMENT PRACTICES IN THE WHITE CLAY LAKE WATERSHED |
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To evaluate the effects of management practices for protection of water quality in White Clay (Wisconsin), surface and lake waters were monitored for a six-year period before and d...
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EVALUATION OF SEDIMENT TRANSPORT MODELS AND COMPARATIVE APPLICATION OF TWO WATERSHED MODELS |
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Suspended solids and sediments are regarded as the two leading pollutants of nation's streams and waterbodies. They serve as carriers for various pesticides, radioactive materials ...
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EVALUATION OF STREAMBANK RESTORATION ON IN-STREAM WATER QUALITY IN AN URBAN WATERSHED |
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The objectives of this on-going project are to: investigate the effectiveness of streambank restoration techniques on increasing available biological habitat and improving in-strea...
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EVALUATION OF THE ROLE OF SEA SALT IMPUTS IN THE LONG-TERM ACIDIFICATION OF COASTAL NEW ENGLAND LAKES (JOURNAL VERSION) |
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Input of neutral salt (NaCl) from sea spray, followed by Na(sup +)-H(sup +) exchange within the soil exchange complex, has been proposed as an important factor in surface water aci...
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EVALUATION OF URBANIZATION IMPACTS ON HYDROLOGY - LABORATORY AND FIELD APPROACHES |
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Although urbanization has a major impact on watershed hydrology, there have not been many studies to quantify how basic hydrological relationships are altered by the addition of im...
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EVALUATION OF WATERSHED QUALITY IN THE MINNESOTA RIVER BASIN |
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Purpose for this research was Lo evaluate the baseline (existing) watershed conditions in the Minnesota River basin. he field work was conducted during 1989-1992). hree kinds of pr...
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EVOLUTION IN LAKE TAI ECOSYSTEMS AS A RESULT OF GLOBAL ENVIRONMENTAL CHANGES AND HUMAN ACTIVITIES |
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Large lakes evolve continuously through interaction with the physical, chemical, and biological environments of the surrounding watershed and lakes. ecent evidence from Lake Tai sh...
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EXAMINATION OF THE ROLE OF PHYSICAL RESOLUTION AND SCALE ON SEDIMENT AND NUTRIENT YIELDS |
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Currently, watershed delineation and extraction of stream networks are accomplished with GIS databases of digital elevation maps (DEMs). The most common method for extracting chann...
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EXAMINING PAST LANDSCAPE CHANGE AND FORECASTING HYDROLOGICAL AND BIOLOGICAL RESPONSE TO LAND USE CHANGE |
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It is currently possible to measure landscape change over large areas and
determine trends in environmental condition using advanced space-based technologies
accompan...
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EXOTIC AND INVASIVE AQUATIC PLANTS IN GREAT LAKES COASTAL WETLANDS: DISTRIBUTION AND RELATION TO WATERSHED LAND USE AND PLANT RICHNESS AND COVER |
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This manuscript provides previously unavailable information to researchers and managers concerning exotic plants in the Great Lakes...This work arises out of our broader efforts to...
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EXPERIMENTAL ACIDIFICATION CAUSES SOIL BASE-CATION DEPLETION AT THE BEAR BROOK WATERSHED IN MAINE |
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There is concern that changes in atmospheric deposition, climate, or land use have altered the biogeochemistry of forests causing soil base-cation depletion, particularly Ca. The B...
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EXPERIMENTAL INDUCEMENT OF NITROGEN SATURATION AT THE WATERSHED SCALE |
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Atmospheric nitrogen deposition to forested ecosystems in excess of vegetative demand may lead to a condition of terrestrial "nitrogen saturation". he subsequent increases in N exp...
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EXPOSURE OF RIPARIAN ECOSYSTEMS TO NON-INDIGENOUS PLANT SPECIES: A CONCEPTUAL RISK ASSESSMENT MODEL |
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Biological invasions are one of the foremost threats to the integrity of riparian
ecosystems worldwide, but little is known regarding the long-term invasion dynamics of
<...
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EXTENDING AQUATIC CLASSIFICATION TO THE LANDSCAPE SCALE HYDROLOGY-BASED STRATEGIES |
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Aquatic classification of single water bodies (lakes, wetlands, estuaries) is often based on geologic origin, while stream classification has relied on multiple factors related to ...
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EXTRACELLULAR ENZYME ACTIIVTY AS A SURROGATE FOR NUTRIENTS AND NUTRIENT HISTORY IN GREAT LAKES WETLANDS |
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Great Lakes ecosystems are generally thought to be P-limited, but N-limitation may be more common than previously suspected. N-limitation should be most obvious in freshwater coas...
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Ecosystem Services: New strategic focus for US EPA’s Ecological Research Program |
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U.S. EPA’s Office of Research and Development has made ecosystem services the new strategic focus for its Ecological Research Program (ERP). Understanding that the protection and ...
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Ecosystem Services: Priority strategic focus for U.S. EPA’s Ecological Research Program |
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U.S. EPA’s Office of Research and Development has made ecosystem services the new strategic focus for its Ecological Research Program (ERP). Understanding that the protection and ...
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Effective Best Management Practices for Nitrogen Removal in Aquatic Ecosystems |
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Elevated nitrate levels in streams and groundwater are detrimental to human and ecosystem health. The Ground Water and Ecosystems Restoration Division (GWERD) of the USEPA investi...
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Effectiveness of Restored Wetlands for the Treatment of Agricultural Runoff (Report) |
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Throughout the Delmarva Peninsula drainage activities that commenced during colonial times and intensified during the 20th century have resulted in the creation of extensive ditch ...
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Encouraging stormwater management using a reverse auction: potential to restore stream ecosystems |
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Stormwater runoff is the primary mechanism by which urbanizing landscapes disrupt natural, stream ecosystems. Source control management has been demonstrated as an effective and c...
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Environmental Flow Modeling Challenges for Rapidly Urbanizing Watersheds |
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It is a challenge for land use planners and water resource managers to balance water needs that support urban growth and economic development of a growing population and yet mainta...
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Evaluating Benefits of LID Practices at Multiple Spatial Scales Using SUSTAIN |
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Low impact development (LID) is a storm water management approach that essentially mimics the way nature works: infiltrate, filter, store, evaporate, and detain runoff close to its...
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FACILITATING ACCESS TO ENVIRONMENTAL INFORMATION WITHIN THE USEPA |
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This document presents an approach for the development of an inventory of environmental information for the U.S. Environmental Protection Agency. This approach was developed by th...
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FACTORS AFFECTING SENSITIVITY OF CHEMICAL AND ECOLOGICAL RESPONSES OF MARINE EMBAYMEMTS TO NITROGEN LOADING |
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This paper summarizes an ongoing examination of the primary factors that affect sensitivity of marine embayment responses to nitrogen loading. Included is a discussion of two metho...
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FACTORS AFFECTING THE LONG-TERM RESPONSE OF SURFACE WATERS TO ACIDIC DEPOSITION: STATE-OF-THE-SCIENCE |
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Recent intensive study of the causes of surface water acidification has led to numerous hypothesized controlling mechanisms. Among these are the salt-effect reduction of alkalinity...
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FACTORS CONTRIBUTING TO DIFFERENCES IN ACID NEUTRALIZING CAPACITY AMONG LAKES IN THE WESTERN UNITED STATES |
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A survey of lakes in mountainous areas of the Western United States was conducted in fall 1985 by the US Environmental Protection Agency (EPA) in cooperation with the USDA - Forest...
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FATE & EFFECTS OF AGRICULTURAL PESTICIDES WITHIN WEEKS BAY WATERSHED, A NATIONAL ESTUARINE RESEARCH RESERVE |
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Lytle, J.S., T.F. Lytle and M.A. Lewis. In press. Fate and Effects of Agricultural Pesticides Within Weeks Bay Watershed, a National Estuarine Research Preserve. To be presented at...
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FEASIBILITY OF ELK CREEK ACID MINE DRAINAGE ABATEMENT PROJECT |
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A study was conducted within the Elk Creek Watershed, West Virginia to determine the technical and economic feasibility of three acid mine drainage abatement techniques. Alkaline r...
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FECAL BACTERIA SOURCE TRACKING AND BACTEROIDES SPP. HOST SPECIES SPECIFICITY ANALYSIS |
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Point and non-point pollution sources of fecal pollution on a watershed adversely impact the quality of drinking source waters and recreational waters. States are required to de...
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FECAL SOURCE TRACKING BY ANTIBIOTIC RESISTANCE ANALYSIS ON A RURAL WATERSHED |
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The Turkey Creek watershed located in northwestern Oklahoma, sustains approximately 40000 head of livestock. In addition, the stream receives partially-treated municipal waste from...
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FECAL SOURCE TRACKING BY ANTIBIOTIC RESISTANCE ANALYSIS ON A WATERSHED EXHIBITING LOW RESISTANCE |
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The ongoing development of microbial source tracking has made it possible to identify contamination sources with varying accuracy, depending on the method used. The purpose of this...
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FIELD AND LABORATORY QUALITY ASSURANCE/QUALITY CONTROL PROTOCOLS AND ACCOMPLISHMENTS FOR THE FERNOW EXPERIMENTAL FOREST WATERSHED ACIDIFICATION STUDY |
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Field and laboratory quality assurance/quality control (QA/QC) protocols for a whole-watershed acidification study on the Fernow Experimental Forest are described. rocedures are de...
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FIELD STUDY OF THE FATE OF ARSENIC, LEAD, AND ZINC AT THE GROUND-WATER/SURFACE-WATER INTERFACE |
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It is recognized that physical and chemical interactions between adjacent ground water and surface water bodies are an important factor impacting water budget and nutrient/contamin...
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FIELD TESTS OF GEOGRAPHICALLY-DEPENDENT VS. THRESHOLD-BASED WATERSHED CLASSIFICATION SCHEMED IN THE GREAT LAKES BASIN |
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We compared classification schemes based on watershed storage (wetland + lake area/watershed area) and forest fragmentation with a geographically-based classification scheme for tw...
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FIELD TESTS OF GEOGRAPHICALLY-DEPENDENT VS. THRESHOLD-BASED WATERSHED CLASSIFICATION SCHEMES IN THE GREAT LAKES BASIN |
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We compared classification schemes based on watershed storage (wetland + lake area/watershed area) and forest fragmentation with a geographically-based classification scheme for tw...
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FIELD-TO-STREAM TRANSPORT OF AGRICULTURAL CHEMICALS AND SEDIMENT IN AN IOWA WATERSHED. PART 2. DATA BASE FOR MODEL TESTING (1979-1980) |
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In a continuation of a previous project, data were collected on the field-to-stream transport of sediment, nutrients, and pesticides in an agricultural watershed. These data contri...
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FIELD-TO-STREAM TRANSPORT OF AGRICULTURAL CHEMICALS AND SEDIMENT IN AN IOWA WATERSHED. PART I: DATA BASE FOR MODEL TESTING (1976-1978) |
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Data on the field-to-stream transport of sediment and chemicals from an agricultural watershed were collected in a 3-year study to provide information for testing and evaluating ma...
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FINDING THE SCALES OF ECOLOGICAL RESPONSE TO LANDSCAPE CHARACTER AND TRIBUTARY INPUTS TO OPEN NEARSHORE WATERS, A GREAT LAKES COAST-WIDE EXPERIENCE |
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In 2002 we sampled over 40 stretches of open coastline across the US portion of the Great Lakes with an equal effort planned for 2003. Sites were selected to represent an intended ...
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FISH PHYSIOLOGY, TOXICOLOGY, AND WATER QUALITY |
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Scientists from ten countries presented papers at the Fifth International Symposium on Fish Physiology, Toxicology, and Water Quality, which was held on the campus of the city Univ...
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FLOOD MANAGEMENT: A CASE STUDY TO LINK SOCIO-ECONOMIC AND ENVIRONMENTAL POLICY |
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Human living standards are inextricably linked through the economy to the integrity of the natural resources from which they are derived. The complex trade-offs needed to shape su...
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FOLIAR WASHOFF OF PESTICIDES (FWOP) MODEL: DEVELOPMENT AND EVALUATION |
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The Foliar Washoff of Pesticides (FWOP) Model was developed to provide an empirical simulation of pesticide washoff from plant leaf surfaces as influenced by rainfall amount. To ev...
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FOREST ECOSYSTEM PROCESSES AT THE WATERSHED SCALE: HYDROLOGICAL AND ECOLOGICAL CONTROLS OF NITROGEN EXPORT. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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FRAMEWORK DESIGN FOR BMP PLACEMENT IN URBAN WATERSHEDS |
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BMP processes into one model is highly desirable
To assist stormwater management professionals in planning for best management practices (BMPs) implementation, the U.S. Environmen...
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FRAMEWORK DESIGN FOR BMP PLACEMENT IN URBAN WATERSHEDS 2005 |
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To assist stormwater management professionals in planning for best management practices (BMPs) implementation, the U.S. Environmental Protection Agency (EPA) began a research proje...
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FRAMEWORK FOR PLACEMENT OF BMP/LID IN URBAN WATERSHED |
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A number of stormwater control strategies, commonly known as best management practices (BMPs), are used to mitigate runoff volumes and associated nonpoint source pollution due to w...
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FRAMEWORK FOR PLACEMENT OF BMP/LID IN URBAN WATERSHEDS |
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A number of stormwater control strategies, commonly known as best management practices (BMPs), are used to mitigate runoff volumes and associated nonpoint source pollution due to w...
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FRAMEWORK FOR PLACEMENT OF BMP/LID IN URBAN WATERSHEDS |
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To assist stormwater management professionals in planning for BMP/LID implementation, the U.S. Environmental Protection Agency (USEPA) has funded the development of a decision sup...
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FROM ASSESSMENT TO ACTION IN WATERSHED RESTORATION. (R825751,R827146) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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FROM PLAN TO PRACTICE: IMPLEMENTING WATERSHED-BASED STRATEGIES INTO LOCAL, STATE, AND FEDERAL POLICY. (R824769) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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FROM THE FOREST TO THE SEA AND BACK AGAIN: MARINE INPUTS AND TERRESTRIAL BIOGEOCHEMISTRY IN THE PACIFIC NORTHWEST |
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Most models of watershed biogeochemistry include the movement of materials from land to rivers and eventually the ocean. Few conceptual views, however, acknowledge the influence o...
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FROM THE MOUNTAINS TO THE SEA: THE STATE OF MARYLAND'S FRESHWATER STREAMS |
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The Maryland Biological Stream Survey, conducted by the Maryland Department of Natural Resources, sampled about 1,000 randomly-selected sites on first through third order freshwate...
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FROM THE SEA TO THE FOREST: SEA SALT DEPOSITION ALTERS SOIL PROCESSES IN COASTAL FORESTS |
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Most models of watershed biogeochemistry include the movement of materials from land to rivers and eventually the ocean. Few conceptual views, however, acknowledge the influence o...
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Framework for Placement of BMPs in Urban Watersheds (2008) |
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The U.S. Environmental Protection Agency’s Urban Watershed Management Branch is responsible for developing and demonstrating methods to manage the risk to public health, property a...
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GATHERING INFORMATION FOR WATERSHED ECOLOGICAL ASSESSMENTS: A REVIEW OF TEN WATERSHED ASSESSMENTS |
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This document outlines and reviews the various types of information used in 10 different watershed assessments. Data tables that describe the data types, sources of data, data rel...
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GENE EXPRESSION AND GENETIC DAMAGE INDICATORS IN FISH EXPOSED TO VARYING STREAM CONDITIONS IN A MIDWESTERN WATERSHED |
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Newly developed molecular diagnostic exposure indicators were evaluated as part of a riparian zone assessment for environmental stressors. Water and fish samples collected from 12...
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GENERATION OF SOIL SOLUTION ACID NEUTRALIZING CAPACITY BY ADDITION OF DISSOLVED INORGANIC CARBON |
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A Spodosol B horizon(base saturation of 5.4%) collected at the Watershed Manipulation Project site at Lead Mountain, ME, was used to examine soil solution chemistry in response to ...
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GENETIC DAMAGE INDICATORS IN FISH EXPOSED TO VARYING STREAM CONDITIONS IN AN AGRICULTURAL WATERSHED |
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Micronucleus (MN) and single cell gel electrophoresis (SCG) measures of genetic damage in fish erythrocytes were included in an evaluation of a wide range of biological and physica...
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GEOCHEMICAL EVOLUTION OF GROUND WATER AND TRANSPORT OF MERCURY AT THE SULPHUR BANK MERCURY MINE SUPERFUND SITE IN NORTHERN CALIFORNIA, USA |
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The Sulphur Bank Mercury Mine, located on the shore of Clear Lake, Lake County, California, is a potential source for a modern-day mercury flux into the local aquatic ecosystem. S...
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GEOCHEMICAL PATTERNS OF ARSENIC-ENRICHED GROUND WATER IN FRACTURED, CRYSTALLINE BEDROCK, NORTHPORT, MAINE, USA |
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High arsenic concentrations of up 26.6 µmol/L (1990 µg/L) occur in ground water collected from a fractured-bedrock system composed of sulfidic schist with granitic to dioritic intr...
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GEOCHEMISTRY AND CHARACTERISTICS OF NITROGEN TRANSPORT AT A CONFINED ANIMAL FEEDING OPERATION IN A COASTAL PLAIN AGRICULTURAL WATERSHED, AND IMPLICATIONS FOR NUTRIENT LOADING IN THE NEUSE RIVER BASIN, NORTH CAROLINA, 1999-2002 |
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Chemical, geologic, hydrologic, and age-dating information collected between 1999 and 2002 were used to examine the transport of contaminants, primarily nitrogen, in ground water a...
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GEOGRAPHIC INFORMATION SYSTEM DOCUMENTATION OF WATERSHED DATA FOR DIRECT/DEALYED RESPONSE PROJECT--NORTHEAST DATABASE |
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The Direct/Delayed Response Project (DDRP) was designed by the U.S Environmental Protection Agency (EPA) within the National Acid Precipitation Assessment Program (NAPAP) to predic...
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GEOGRAPHIC INFORMATION SYSTEM DOCUMENTATION OF WATERSHED DATA FOR DIRECT/DELAYED RESPONSE PROJECT-SOUTHERN BLUE RIDGE PROVINCE DATABASE |
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The Direct/Delayed Response Project (DDRP) was designed by the U.S. Environmental Protection Agency (EPA) within the National Acid Precipitation Assessment Program (NAPAP) to predi...
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GEOLOGIC AND ATMOSPHERIC INPUT FACTORS AFFECTING WATERSHED CHEMISTRY IN UPPER MICHIGAN |
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The relationships between watershed variables and lakewater chemistry were examined for 53 lakes in the Upper Peninsula of Michigan to identify factors influencing lake sensitivity...
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GEOMORPHIC CONTROLS ON C AND N PROCESSING IN A RESTORED URBAN STREAM; POWER POINT PRESENTATION |
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Stream channel incision due to hydraulic alteration stemming from urbanization may cause a disconnection between the stream channel and the adjacent floodplain. This disconnection...
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GEOMORPHOLOGY AND ANTHROPOGENIC INFLUENCES ON FISH AND AMPHIBIANS IN PACIFIC NORTHWEST COASTAL STREAMS |
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Physical habitat degradation has been implicated as a major contributor to the historic decline of salmonids in Pacific Northwest streams. Native aquatic vertebrate assemblages in...
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GIS APPLICATION OF LANDSCAPE METRICS TO IDENTIFY WETLAND RESTORATION TARGETS IN ARKANSAS WHITE RIVER BASIN |
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Techniques for the broad-scale identification of wetland restoration sites are increasingly being sought for the purposes of improving the functions of wetlands that infIuence wate...
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GIS-BASED HYDROLOGIC MODELING: THE AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT TOOL |
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Planning and assessment in land and water resource management are evolving from simple, local scale problems toward complex, spatially explicit regional ones. Such problems have to...
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GIS-BASED HYDROLOGIC MODELING: THE AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT TOOL |
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Planning and assessment in land and water resource management are evolving from simple, local scale problems toward complex, spatially explicit regional ones. Such problems have to...
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GLOBAL CLIMATE AND LARGE-SCALE INFLUENCES ON AQUATIC ANIMAL HEALTH |
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The last 3 decades have witnessed numerous large-scale mortality events of aquatic organisms in North America. Affected species range from ecologically-important sea urchins to com...
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GREENROOF RUNOFF WATER QUALITY |
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This project evaluated green roofs as a stormwater management tool. Specifically, runoff quantity and quality from green and flat asphalt roofs was compared. Evapotranspiration fro...
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GROUND WATER AND WATERSHEDS AND ENVIRONMENTAL PROTECTION |
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Effective watershed management has the potential to achieve both drinking water and ecological protection goals. However, it is important that the watershed perspective be three- d...
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GROUP REPORT: INTERACTIONS AMONG ACIDIFICATION, PHOSPHOROUS, CONTAMINANTS, AND BIOTA IN FRESHWATER ECOSYSTEMS |
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Scientific investigations over the last two decades have examined the processes and effects of acidic deposition on surface waters and their catchments. hese studies have been perf...
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GROWTH, SURVIVAL AND MOVEMENT OF JUVENILE SALMONIDS AS INDICATORS OF HABITAT QUALITY |
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Fish-habitat relationships have often relied on measures of fish abundance as indices of habitat quality. Indices based on abundance measures may be misleading, however, due to hi...
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GWLFXL & CSIM: SIMPLE WATERSHED MODELS FOR COASTAL NUTRIENT LOADING. (R830882) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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Green Infrastructure Research at NRMRL’s Urban Watershed Research Facility |
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USEPA’s National Risk Management Research Laboratory (NRMRL) examined several options for completing water quality research supporting the Clean Water Act and the Safe Drinking Wat...
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Green Roofs for Stormwater Management |
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This project evaluated green roofs as a stormwater management tool. Results indicate that the green roofs are capable of removing 40% of the annual rainfall volume from a roof thro...
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Green Roofs for Stormwater Runoff Control |
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This project evaluated green roofs as a stormwater management tool. Specifically, runoff quantity and quality from green and flat asphalt roofs were compared. Evapotranspiration fr...
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HABITAT PRESERVATION FOR MIDWEST STREAM FISHES-PRINCIPLES AND GUIDELINES |
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The degradation of running water resources is at least partly due to a lack of understanding of the physical and biological dynamics of stream and river ecosystems and to the lack ...
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HABITAT RELATIONSHIPS OF WATERFOWL WINTERING IN NARRAGANSTT BAY |
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Coastal marine habitats often provide essential structure and life support functions for estuarine-dependent wildlife such as wading birds, small mammals, and waterfowl. Unfortuna...
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HIGH ARSENIC CONCENTRATIONS AND ENRICHED SULFUR AND OXYGEN ISOTOPES IN A FRACTURED-BEDROCK GROUND-WATER SYSTEM |
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Elevated arsenic concentrations are coincident with enriched sulfur and oxygen isotopes of sulfate in bedrock ground water within Kelly's Cove watershed, Northport, Maine, USA. Int...
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HIGH SPATIAL RESOLUTION SATELLITE REMOTE SENSING FOR PLANNING AND LOCATING ANIMAL FEEDING OPERATIONS |
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Surface runoff of animal waste and its infiltration into groundwater can pose a number of risks to water quality mainly because of the amount of animal manure and wastewater th...
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HIGH SUMMER WATER TEMPERATURES IN OREGON COAST RANGE WATERSHED WITH SEDIMENTARY GEOLOGY |
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abstract for oral presentation...
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HIGH-RESOLUTION SPATIAL MODELING OF DAILY WEATHER ELEMENTS FOR A CATCHMENT IN THE OREGON CASCADE MOUNTAINS, UNITED STATES |
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High-quality, daily meteorological data at high spatial resolution are essential for a variety of hydrologic and ecological modeling applications that support environmental risk as...
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HISTORICAL RECONSTRUCTION OF CONTAMINANT AND ECOLOGICAL CONDITIONS IN AN URBAN SETTING |
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One problem encountered when trying to establish goals for remediation or restoration of contaminated waterways is the determination of appropriate reference conditions. As an alte...
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HISTORICAL RECONSTRUCTION OF CONTAMINANT AND ECOLOGICAL CONDITIONS IN NEW BEDFORD HARBOR, MASSACHUSETTS |
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One problem encountered when trying to establish goals for remediation or restoration of contaminated waterways is the determination of appropriate reference conditions. As an alte...
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HOW EFFECTIVE ARE RIPARIAN BUFFERS IN CONTROLLING NUTRIENT EXPORT FROM AGRICULTURAL WATERSHEDS? |
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Riparian buffers are being established in many parts of the world as part of nonpoint source pollution management strategies. A large number of studies have documented the potentia...
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HOW FAR TO THE NEAREST ROAD? |
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Ecological impacts from roads may be the rule rather than the exception in most watersheds of the conterminous United States. We measured total area, and forestland area located wi...
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HOW MUCH ACIDIFICATION HAS OCCURRED IN ADIRONDACK REGION (NEW YORK, USA) LAKES SINCE PRE-INDUSTRIAL TIMES? |
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The magnitude of acidification estimated in this study is somewhat less than that of computer-based model estimates, and suggests that watershed and/or in-lake neutralization of ac...
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HSPF Toolkit: a New Tool for Stormwater Management at the Watershed Scale |
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The Hydrological Simulation Program - FORTRAN (HSPF) is a comprehensive watershed model endorsed by US EPA for simulating point and nonpoint source pollutants. The model is used fo...
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HUMAN-ECOSYSTEM INTERACTIONS: THE CASE OF MERCURY |
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Human and ecosystem exposure studies evaluate exposure of sensitive and vulnerable populations. We will discuss how ecosystem exposure modeling studies completed for input into the...
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HYDRAULIC ANALYSIS ON STREAM-AQUIFER INTERACTION BY STORAGE FUNCTION MODELS |
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In the natural hydrologic cycle, surface and subsurface water in a watershed are closely related and interact with each other. However, their relatrionships are affected by human ...
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HYDROGEOLOGIC FOUNDATION IN SUPPORT OF ECOSYSTEM RESTORATION: BASE-FLOW LOADINGS OF NITRATE IN MID-ATLANTIC AGRICULTURAL WATERSHEDS (EPA/600/R-99/104) |
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Field evidence suggests that deep denitrification in the subsurface has the potential for
removal of nitrate from ground water. Two adjacent agricultural watersheds in the mid-
Atl...
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HYDROGEOLOGIC FOUNDATIONS IN SUPPORT OF ECOSYSTEM RESTORATION: BASE-FLOW LOADINGS OF NITRATE IN MID-ATLANTIC AGRICULTURAL WATERSHEDS |
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Field evidence suggests that deep denitrification in the subsurface has the potential for
removal of nitrate from ground water. Two adjacent agricultural watersheds in the mid-<...
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HYDROGEOLOGICAL AND GEOCHEMICAL FACTORS INFLUENCING MERCURY FATE AND TRANSPORT AT THE SULPHUR BANK MERCURY MINE, LAKE COUNTY, CALIFORNIA |
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Clear Lake, located approximately 150 km north of San Francisco in Lake County, is one of the largest fresh water lakes in the California. Elevated mercury levels were first identi...
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HYDROGEOMORPHOLOGY, WATERSHED GEOLOGY, AND WATER QUALITY OF WETLANDS IN CENTRAL PENNSYLVANIA. (R824905) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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HYDROLOGIC AND STREAM TEMPERATURE MODELING FOR ANADROMOUS FISH HABITAT RESTORATION IN A WILDLAND WATERSHED |
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Reduction or removal of streamside vegetation by logging and grazing can alter stream temperatures by reducing riparian shading. In the Pacific Northwest of the United States and ...
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HYDROLOGIC CONTROL OF LAKE SUSCEPTIBILITY TO ACIDIFICATION |
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Two hundred and seventy-five lakes were sampled in the summer of 1979 to assess the factors controlling susceptibility of northcentral Wisconsin lakes to acidification. In addition...
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HYDROLOGIC ELEMENTS OF ECOLOGICAL RISK IN THE CONTENTNEA WATERSHED, NORTH CAROLINA |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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HYDROLOGIC EVALUATION OF HYDROGEOMORPHIC CLASSIFICATION OF WETLANDS IN THE JOHN DAY WATERSHED, OREGON, U.S.A. |
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Hydrologic data are essential for understanding wetland structure and function and for characterizing landscape-scale patterns of wetland occurrence. The hydrology of wetlands in ...
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HYDROLOGIC MODEL CALIBRATION AND UNCERTAINTY IN SCENARIO ANALYSIS |
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A systematic analysis of model performance during simulations based on
observed land-cover/use change is used to quantify error associated with water-yield
simulation...
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HYDROLOGIC MODELING OF AN EASTERN PENNSYLVANIA WATERSHED WITH NEXRAD AND RAIN GAUGE DATA |
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This paper applies the Soil Water Assessment Tool (SWAT) to model the hydrology in the Pocono Creek watershed located in Monroe County, Pa. The calibrated model will be used in a s...
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HYDROLOGIC REGIME CLASSIFICATION OF LAKE MICHIGAN COASTAL RIVERINE WETLANDS BASED ON WATERSHED CHARACTERISTICS |
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Classification of wetlands systems is needed not only to establish reference condition, but also to predict the relative sensitivity of different wetland classes. In the current st...
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HYDROLOGICALLY-BASED CLASSIFICATION AS A TOOL TO REDUCE BACKGROUND IN LAND-USE - OR NUTRIENT - RESPONSE RELATIONSHIPS IN LAKE MICHIGAN COASTAL RIVERINE WETLANDS |
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Flow-based watershed classes provide useful strata for sampling and assessment schemes both for instream condition and condition of downstream receiving waters and may provide usef...
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HYDROLOGICALLY-BASED CLASSIFICATION AS A TOOL TO REDUCE BACKGROUND VARIATION IN LAND USE - OR NUTRIENT - RESPONSE RELATIONSHIPS IN LAKE MICHIGAN COASTAL RIVERINE WETLANDS |
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Flow-based watershed classes provide useful strata for sampling and assessment schemes both for instream condition and condition of downstream receiving waters, and may provide use...
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HYDROLOGY AND SEDIMENT MODELING USING THE BASINS NON-POINT SOURCE MODEL |
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The Non-Point Source Model (Hydrologic Simulation Program-Fortran, or HSPF) within the EPA Office of Water's BASINS watershed modeling system was used to simulate streamflow and to...
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HYDROLOGY OF COASTAL WETLANDS OF LAKE SUPERIOR: LAKE AND TRIBUTARY ROLES IN MIXING REGIME AND TURNOVER TIMES |
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Our work on coastal wetlands of western Lake Superior indicates that hydrological linkages to the lake and watershed are highly dynamic, with potentially significant implications f...
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HYPOXIA IN THE GULF OF MEXICO: ASSESSING AND MANAGING RISKS FROM NONPOINT SOURCE POLLUTANTS IN THE MISSISSIPPI RIVER BASIN |
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. Hypoxia is the condition in which dissolved oxygen levels are below that necessary to sustain most animal life. The largest zone of oxygen depletion in U.S. coastal waters is f...
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Human - Ecosystem Interactions: The Case of Mercury |
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Human and ecosystem exposure studies evaluate exposure of sensitive and vulnerable populations. We will discuss how ecosystem exposure modeling studies completed for input into the...
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Hydrology and Hyporheic Nitrogen Biogeochemistry in a Geomorphically Degraded Urban Stream |
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Few studies have investigated the relationship between hydrology and nitrogen biogeochemistry in hyporheic zones of degraded urban streams despite significant national efforts to r...
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IDENTIFICATION AND LOCATION OF FUNDAMENTAL FISH ASSEMBLAGES IN THE MID-ATLANTIC HIGHLANDS |
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To predict fish community response to environmental restoration in the Highlands Region one must first have information on fish abundance and diversity. We used data collected by ...
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IDENTIFICATION EFFICIENCY IN GROUNDWATER ADJACENT TO DITCHES WITHIN CONSTRUCTED RIPARIAN WETLANDS: KANKAKEE WATERSHED, ILLINOIS-INDIANA, U.S.A. |
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Dual isotope evaluations of NO3 in groundwater adjacent to ditches within constructed riparian wetlands across the Kankakee water-shed may assist the determination of denitrificati...
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IDENTIFICATION OF AMMONIA AS AN IMPORTANT SEDIMENT-ASSOCIATED TOXICANT IN THE LOWER FOX RIVER AND GREEN BAY WISCONSIN |
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Toxicity of sediment pore water from 13 sites in the lower Fox River/Green Bay watershed was assessed using a number of test species. ediment pore water from the 10 lower Fox River...
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IDENTIFICATION OF SEDIMENT SOURCE AREAS WITHIN A WATERSHED |
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Identification of sediment source areas is crucial for designing proper abatement strategies that reduce sediment and associated contaminant loading to receiving water downstream. ...
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IDENTIFICATION OF SEDIMENT SOURCE AREAS WITHIN A WATERSHED |
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Two methods, one using a travel time approach and the other based on optimization techniques, were developed to identify sediment generating areas within a watershed. Both methods ...
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IDENTIFYING SOURCES OF SNOWMELT ACIDIFICATION WITH A WATERSHED MIXING MODEL |
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The study used ionic tracers to estimate the volume of old (soil and ground) water interacting with snowmelt in eleven Adirondack, NY watersheds. he contribution of old water varie...
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IDENTIFYING SOURCES OF STRESS TO NATIVE AQUATIC SPECIES USING A WATERSHED ECOLOGICAL RISK ASSESSMENT FRAMEWORK. |
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The free-flowing Clinch and Powell River basin, located in southwestern Virginia, U.S.A., historically had one of the richest assemblages of native fish and freshwater mussels in ...
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IMAGING SPECTROSCOPY FOR DETERMINING RANGELAND STRESSORS TO WESTERN WATERSHEDS |
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The Environmental Protection Agency is developing rangeland ecological indicators in twelve western states using advanced remote sensing techniques. Fine spectral resolution (hyper...
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IMAGING SPECTROSCOPY FOR DETERMINING RANGELAND STRESSORS TO WESTERN WATERSHEDS |
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The Environmental Protection Agency is developing rangeland ecological indicators in eleven western states using advanced remote sensing systems. Fine spectral resolution (hyperspe...
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IMPACT OF BEST MANAGEMENT PRACTICES ON WATER QUALITY OF TWO SMALL WATERSHEDS IN INDIANA: ROLE OF SPATIAL SCALE |
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Transport and fate of sediments and nutrients within watersheds have important implications for water quality and water resources. Water quality issues often arise because sediment...
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IMPACT OF BURROWING SHRIMP POPULATIONS ON C, N CYCLING AND WATER QUALITY IN WESTERN NORTH AMERICAN TEMPERATE ESTUARIES |
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Thalassinid burrowing shrimp (predominantly, Neotrypaea californiensis and Upogebia pugettensis) inhabit large expanses of tide flats in North American Pacific estuaries, from Brit...
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IMPACT OF BURROWING SHRIMP POPULATIONS ON NITROGEN CYCLING AND WATER QUALITY IN WESTERN NORTH AMERICAN TEMPERATE ESTUARIES |
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Thalassinid burrowing shrimp (predominantly, Neotrypaea californiensis and Upogebia pugettensis) inhabit large expanses of tide flats in North American Pacific estuaries, from Brit...
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IMPACT OF LAND USE IN THE WATERSHED ON NUTRIENT UPTAKE IN STREAMS. (R824777) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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IMPACT OF SUBMERSIBLE PUMPS ON PB CONSTITUENTS IN RESIDENTIAL WELLS |
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Dissolved lead in 51 domestic wells screened from 18 m to 48 m in glacial tills and outwash deposits were examined, from archived samples collected during 2001-2004, in conjunction...
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IMPACT OF URBANIZATION ON THE HYDROLOGY OF THE POCONO CREEK WATERSHED: A MODEL STUDY |
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The Pocono Creek watershed located in Monroe County, PA, is threatened by high population growth and urbanization. Of concern specifically is the potential impact of future develop...
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IMPACTS OF AMMONIUM SULFATE TREATMENT ON THE FOLIAR CHEMISTRY OF FOREST TREES AT THE BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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IMPACTS OF ANTHROPOGENIC CHANGE ON THE ECOLOGY OF HUMAN PATHOGENS IN A EUTROPHYING ESTUARY: THE NEUSE RIVER ESTUARY |
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Approximately 75% of people in the U.S. live in coastal watersheds, with coastal urbanization and agricultural and industrial development increasing at rapid rates. Accelerating n...
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IMPACTS OF CROPLAND RUNOFF ON NUTRIENT AND PESTICIDE CONCENTRATIONS IN RIVER SYSTEMS |
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The report includes data developed over several years on the concentrations and loadings of nutrients and sediments in Lake Erie tributaries. These data illustrate several characte...
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IMPACTS OF IMPERVIOUS SURFACE ON WATERSHED HYDROLOGY: A REVIEW |
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Increased impervious surface is a consequence of urbanization, with correspondent and significant effects on the hydrologic cycle. It is intuitive that an increased proportion of ...
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IMPACTS OF LAND USE ON HYDROLOGIC FLOW PERMANENCE IN HEADWATER STREAMS |
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Extensive urbanization in the watershed can alter the stream hydrology by increasing peak runoff frequency and reducing base flows, causing subsequent impairment of stream communit...
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IMPACTS OF MARINE AEROSOLS ON SURFACE WATER CHEMISTRY AT BEAR BROOK WATERSHED, MAINE USA |
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The East Bear catchment at Bear Brook Watershed, Maine receives moderate (for the eastern U.S.) amounts of Cl- in wet and dry deposition. In 1989, Cl- in precipitation ranged from ...
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IMPACTS OF MERCURY EXPOSURE ON FREE-RANGING POST-FLEDGED PISCIVOROUS BIRDS |
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Mercury is one of the priority pollutants of concern for several EPA programs, other federal agencies, and state governments. The concern is especially focused on methyl mercury be...
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IMPACTS OF NITROGEN LOADING ON SALT MARSH INTEGRITY IN NEW ENGLAND, USA |
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Salt marsh habitat integrity is linked with the ability to provide good water quality and high biodiversity. We measured high denitrification enzyme activity (DEA) in ten coastal ...
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IMPACTS OF URBANIZATION ON WATERSHED HYDROLOGIC FUNCTION |
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Although urbanization has a major impact on watershed hydrology, there have not been studies to quantify basic hydrological relationships that are altered by the addition of imperv...
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IMPEDIMENTS AND SOLUTIONS TO SUSTAINABLE, WATERSHED-SCALE URBAN STORMWATER MANAGEMENT: LESSONS FROM AUSTRALIA AND THE UNITED STATES |
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In urban and exurban areas, stormwater runoff is a primary stressor on surface waters (streams, wetlands, lakes, estuaries, and coastal waters). Conventional urban stormwater drai...
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IMPERVIOUS COVER AS A REGIONAL INDICATOR |
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Increases in impervious surface area in a watershed gives rise to changes in stream hydrology, stream channel morphology, increased pollutant runoff, and an increase in stream wate...
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IMPERVIOUS SURFACE AREA AND BENTHIC MACROINVERTEBRATE RESPONSE AS INDEX OF IMPACT FROM URBANIZATION ON FRESHWATER WETLANDS |
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The use of benthic macroinvertebrates to monitor water quality and ecological integrity is not as well established for wetlands as it is for rivers, streams and lakes where this fo...
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IMPERVIOUS SURFACE RESEARCH IN THE MID-ATLANTIC |
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Anthropogenic impervious surfaces have an important relationship with non-point source pollution (NPS) in urban watersheds. These human-created surfaces include such features as r...
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IMPERVIOUS SURFACES AND STEAMFLOW DISCHARGE: A HISTORICAL REMOTE SENSING PERSPECTIVE IN A NORTHERN VIRGINIA SUB-WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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IMPERVIOUS SURFACES AND STREAMFLOW DISCHARGE: A HISTORICAL REMOTE SENSING PERSPECTIVE IN A MID-ATLANTIC SUB-WATERSHED |
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Aerial photography provides a historical vehicle for determining long term urban landscape change and, with concurrent daily streamflow and precipitation records, allows th...
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IMPLEMENTING REGIONAL SCALE MONITORING IN THE PACIFIC NORTHWEST REGION OF THE U.S. |
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Vast forest greeted the early non-native explorers and settlers as they traversed the Pacific Northwest, currently the states of Washington, Oregon and Northern California, west of...
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IMPLICATIONS OF FISH MOVEMENT AND SEASONAL HABITAT DYNAMICS FOR RESTORATION PLANNING AND PRIORITIZATION |
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J. L. Ebersole1*, S.G. Leibowitz1, P.J. Wigington Jr. 1, J.P. Baker1, M.A. Cairns1, M.R. Church1, J. Compton1, B. Hansen2, B. Miller3
1 Environmental Protection Agency, 200 SW 3...
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IMPORTANCE OF GROUNDWATER SULFATE TO ACIDIFICATION IN THE GOOSE RIVER WATERSHED, MAINE |
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The role of groundwater sulfate discharge to ponds and streams within the Goose River basin (33.3 km2) is examined. While airborne sulfate disposition has declined, acid...
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IN-STREAM AND WATERSHED PREDICTORS OF GENETIC DIVERSITY, EFFECTIVE POPULATION SIZE AND IMMIGRATION ACROSS RIVER-STREAM NETWORKS |
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The influence of spatial processes on population dynamics within river-stream networks is poorly understood. Utilizing spatially explicit analyses of temporal genetic variance, we ...
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INCORPORATING HABITAT CONSERVATION GOALS INTO WATERSHED RESTORATION PLANS. (R827146) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INDICATORS OF ANTHROPOGENIC DISTURBANCE IN STREAMS AND RECEINVING SALT MARSHES |
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Land use and anthropogenic activities in watersheds affect biological, chemical, and physical conditions in streams and receiving coastal salt marshes. Our objective was to compa...
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INDICATORS OF ANTHROPOGENIC DISTURBANCE IN STREAMS AND RECEIVING SALT MARSHES |
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Land use and anthropogenic activities in watersheds affect biological, chemical, and physical conditions in streams and receiving coastal salt marshes. Our objective was to compare...
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INDICATORS OF ANTHROPOGENIC DISTURBANCES IN STREAMS AND RECEIVING SALT MARSHES |
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Land use and anthropogenic activities in watersheds affect biological, chemical, and physical conditions in streams and receiving coastal salt marshes. Our objective was to compare...
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INFILTRATION ON MOUNTAIN SLOPES: A COMPARISON OF THREE ENVIRONMENTS. (R825157) |
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Water is well established as a major driver of the geomorphic change that eventually reduces mountains to lower relief landscapes. Nonetheless, within the altitudinal limits of ...
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INFLUENCE OF COAL SURFACE MINING ON THE AQUATIC ENVIRONMENT OF THE CUMBERLAND PLATEAU |
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Ten small watersheds in east Tennessee were studied during a four year period from 1975-1979 in order to provide background data for the development and demonstration of regional m...
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INFLUENCE OF EQUINE FECAL CONTAMINATION ON MICROBIAL COMMUNITY STRUCTURE IN A SUB-WATERSHED |
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As monitoring of watershed water quality is directly related to proposed uses, it is important for our Naton's water systems that the d4etemrination of and distinction between feca...
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INFLUENCE OF LOCAL AND LANDSCAPE FACTORS ON BEDLOAD TRANSPORT IN LOW-ORDER LAKE SUPERIOR WATERSHEDS |
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Bedload samples were collected from 48 second and third order Lake Superior tributaries during snowmelt in 1998 and 1999. This work was part of a comparative watershed study evalua...
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INFLUENCE OF LOCAL AND LANDSCAPE FACTORS ON SEDIMENT TRANSPORT IN LOW-ORDER LAKE SUPERIOR WATERSHEDS |
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Bedload and suspended sediment samples were collected from 48 second and third order Lake Superior tributaries during snowmelt in 1998 and 1999. Additional suspended sediment sampl...
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INFLUENCE OF OREGON COASTAL STREAM TEMPERATURES ON THE OCCURRENCE OF BLACK SPOT INFESTATION IN JUVENILE COHO SALMON |
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We quantified the occurrence of black-spot infestation of juvenile salmonids in the West Fork Smith River stream network during the summer 2002 through summer 2003 period. In this ...
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INFLUENCE OF STREAM NETWORK-SCALE HABITAT OF A COASTAL OREGON WATERSHED ON COHO SALMON AND OTHER NATIVE FISH |
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EPA's Western Ecology Division is undertaking research addressing catchment-scale dynamics of freshwater habitat productivity for native fishes. Through partnerships with state and...
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INFLUENCE OF SUMMER STREAM TEMPERATURES ON BLACK SPOT INFESTATION OF JUVENILE COHO SALMON IN THE OREGON COAST RANGE |
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High summer water temperatures can adversely affect stream salmonids in numerous ways. The direct effects of temperature associated with increased metabolic demand can be exacerba...
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INFLUENCES OF HYDROLOGY ON NUTRIENT DYNAMICS IN LAKE SUPERIOR COASTAL WETLANDS |
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Little is known about the role of the coastal wetlands (CWs) of Lake Superior in modifying or contributing to nutrient fluxes from watersheds to the lake. We are studying factors c...
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INNOVATIVE ENVIRONMENTAL EDUCATION CONTRIBUTES TO IMPROVED MANAGEMENT PRACTICES IN THE MID-ATLANTIC |
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The Mid-Atlantic Integrated Assessment (MAIA) and its partner, University of Maryland, Baltimore County (UMBC) have developed a graduate-level course focused on successful applicat...
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INNOVATIVE URBAN WET-WEATHER FLOW MANAGEMENT SYSTEMS |
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This report describes innovative methods to improve wet weather flow (WWF) management systems, that provide drainage services at the same time as decreasing stormwater pollutant di...
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INPUT-OUTPUT BUDGETS OF INORGANIC NITROGEN FOR 24 FOREST WATERSHEDS IN THE NORTHEASTERN UNITED STATES: A REVIEW |
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Input-output budgets for dissolved inorganic nitrogen (DIN) are summarized for 24 small watersheds at 15 locations in the northeasternUnited States. The study watersheds are comple...
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INSTITUTIONAL MAPPING OF OREGON COASTAL WATERSHED MANAGEMENT OPTIONS. (R825751) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTEGRATED ASSESSMENTS OF ANTHROPOGENIC AND NATURAL CHANGES IN CHESAPEAKE BAY WATERSHEDS |
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Both natural and anthropogenic factors affect spatial and temporal patterns in ecosystem conditions. To manage environmental change and risks, distinguishing between natural variat...
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INTEGRATED ASSESSMENTS OF THE ENVIRONMENTAL CONDITION OF THE CHESAPEAKE BAY |
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The Chesapeake Bay, the Nation's largest estuary, has experienced environmental degradation due to nutrient enrichment, contamination, loss of habitat, and over-harvesting of livin...
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INTEGRATED COASTAL RESERVE PLANNING: MAKING THE LAND-SEA CONNECTION |
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Land use, watershed processes, and coastal biodiversity can be strongly coupled. Land-sea interactions are ignored, however, when selecting terrestrial and marine reserves with exi...
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INTEGRATED ECOLOGICAL ECONOMIC MODELING OF THE PATUXENT RIVER WATERSHED, MARYLAND. (R824766) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTEGRATED ECOLOGICAL ECONOMIC MODELING OF THE PATUXENT RIVER WATERSHED, MARYLAND. (R827169) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTEGRATED MODELING FOR WATERSHED MANAGEMENT: MULTIPLE OBJECTIVES AND SPATIAL EFFECTS. (R827932) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTEGRATED RESEARCH PLAN FOR LINKING BMPS AND WATERSHED WATER QUALITY IN SOUTHERN OHIO |
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Although it is routine for watershed management programs to coincide the monitoring of land use impacts and water quality at different spatial scales, rarely are the data collected...
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INTEGRATING A LANDSCAPE HYDROLOGIC ANALYSIS FOR WATERSHED ASSESSMENT |
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Methods to provide linkages between a hydrologic modeling tool (AGW A) and landscape assessment tool (A TtILA) for determining the vulnerability of semi-arid landscapes to natural...
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INTEGRATING CLEAN WATER ACT SECTION 305(B) AND 303(D) MONITORING AND ASSESSMENT OF STATE WATERS |
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Section 303(d) of the Clean Water Act (CWA) mandates States to develop lists of all impaired waterbodies and prioritize these waters for establishment of plans to restore degraded ...
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INTEGRATING DETAILED SOIL SURVEY AND LANDTYPE MAPPING FOR WATERSHED SCALE ASSESSMENTS IN THE WESTERN OREGON CASCADE MOUNTAINS |
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Although the Western Oregon Cascades is one of the most intensely managed and economically important forest regions in North America, a lack of detailed soil information has hinder...
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INTEGRATING DIFFUSE/NONPOINT POLLUTION CONTROL AND WATER BODY RESTORATION INTO WATERSHED MANAGEMENT. (R825759) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTEGRATING ECOLOGICAL RISK ASSESSMENT AND ECONOMIC ANALYSIS IN WATERSHEDS: A CONCEPTUAL APPROACH AND THREE CASE STUDIES |
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This document reports on a program of research to investigate the integration of ecological risk assessment (ERA) and economics, with an emphasis on the watershed as the scale for ...
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INTEGRATING LANDSCAPE AND HYDROLOGIC ANALYSIS FOR WATERSHED ASSESSMENT IN AN AMERICAN SEMI-ARID BIOREGION |
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The objective of this study is to demonstrate the application of operational hydrologic modeling and landscape assessment tools to investigate the temporal and spatial effects of v...
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INTEGRATING LANDSCAPE ASSESSMENT AND HYDROLOGIC MODELING FOR LAND COVER CHANGE ANALYSIS |
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This study is based on the assumption that land cover change and rainfall spatial variability affect the r-ainfall-runoff relationships on the watershed. Hydrologic response is an ...
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INTEGRATING SOURCE WATER PROTECTION AND DRINKING WATER TREATMENT: U.S. ENVIRONMENTAL PROTECTION AGENCY'S WATER SUPPLY AND WATER RESOURCES DIVISION |
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The U.S. Environmental Protection Agency's (EPA) Water Supply and Water Resources Division (WSWRD) is an internationally recognized water research organization established to assis...
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INTEGRATING THE SCIENCE AND TECHNOLOGY OF ENVIRONMENTAL ASSESSMENT ACROSS FEDERAL AGENCIES |
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Seven Federal Agencies are conducting collaborative research to provide the next generation of environmental models for analyzing complex multimedia, multi-stressor contamination p...
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INTEGRATIVE CONSIDERATIONS IN WATERSHED PLANNING |
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Understanding the filters through which society views the values produced by watersheds is key to developing effective and adaptable watershed plans, and ultimately a measure of ho...
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INTENSIVE WATERSHED STUDY: THE PATUXENT RIVER BASIN |
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This study was one of five intensive watershed studies designed by the Chesapeake Bay Program's Eutrophication Work Group to provide detailed nonpoint source loading rates and ambi...
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INTERACTION BETWEEN SCIENTISTS AND NONSCIENTISTS IN COMMUNITY-BASED WATERSHED MANAGEMENT: EMERGENCE OF THE CONCEPT OF STREAM NATURALIZATION. (R825306) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTERACTION BETWEEN SCIENTISTS AND NONSCIENTISTS IN COMMUNITY-BASED WATERSHED MANAGEMENT: EMERGENCE OF THE CONCEPT OF STREAM NATURALIZATION. (R827148) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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INTERACTIVE HABITAT MODELS FOR MID-ATLANTIC HIGHLAND STREAM FISHES |
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In most wadeable streams of the Mid-Atlantic Highland region of the eastern United States, habitat alteration resulting from development in the watershed is the primary stressor fo...
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INTERACTIVE HABITAT SUITABILITY MODELS FOR STREAM FISHES IN THE MID-ATLANTIC HIGHLANDS |
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Models that predict the presence of stream fish species based on habitat characteristics can be useful in watershed management. We developed such models for each of fourteen Mid-At...
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INTERGRATING SOURCE WATER PROTECTION AND DRINKING WATER TREATMENT: U.S. ENVIRONMENTAL PROTECTION AGENCY'S WATER SUPPLY AND WATER RESOURCES DIVISION |
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The U.S. Environmental Protection Agency's (EPA) Water Supply and Water Resources Division (WSWRD) is an internationally recognized water research organization established to assis...
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INTERMEDIATE-RANGE GRID MODEL AND USER'S GUIDE FOR ATMOSPHERIC SULFUR DIOXIDE AND SULFATE CONCENTRATIONS AND DEPOSITIONS - WISCONSIN POWER PLANT IMPACT STUDY |
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The UWATM-SOX computer model was developed to address the acid rain problem on a mesoscale. It predicts sulfur dioxide (SO2) and sulfate (SO4) ambient air concentrations and ground...
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INTERMEDIATE-RANGE GRID MODEL FOR ATMOSPHERIC SULFUR DIOXIDE AND SULFATE CONCENTRATIONS AND DEPOSITIONS |
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A three-dimensional time-dependent grid type model for two chemically reacting species which undergo atmospheric transport, diffusion and wet and dry deposition over a region of se...
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INTERNAL NITROGEN CYCLING IN WESTERN OREGON FORESTS WITH DIFFERENT NITROGEN STATUS |
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Nitrogen incorporation and retention in forest ecosystems should vary with site N status, because nitrogen often limits temperate forest productivity and microbial activity. We fo...
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INTERNATIONAL PERSPECTIVE: U.S. EPA'S APPROACH TO SURVEILLANCE AND MANAGEMENT OF WATER QUALITY |
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For the past 35 years, the Environmental Protection Agency (EPA) has been establishing health-based standards for more than 80 contaminants and developing water quality methods and...
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INTO THE LOOKING GLASS: A VIEW OF THE WATER QUALITY IMPACTS OF FUTURE LAND-USE DEVELOPMENTS IN THE LITTLE MIAMI RIVER WATERSHED |
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This study assesses the water quality impacts of impending future land-use changes in the Little Miami River watershed in southwestern Ohio. By calibrating and validating an integ...
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INTRODUCTION TO ATTILA (ANALYTICAL TOOLS INTERFACE FOR LANDSCAPE ASSESSMENTS): AN ARCVIEW EXTENSION |
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Geographic Information Systems (GIS) have become a powerful tool in the field of landscape ecology. A common application of GIS is the generation of landscape indicators, which are...
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INTRODUCTION TO THE LANDSCAPE ANALYSIS TOOLS ARCVIEW EXTENSION |
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Geographic Information Systems (GIS) have become a powerful tool in the field of landscape ecology. A common application of GIS is the generation of landscape indicators, which are...
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INVESTIGATIONS INTO THE EFFECTS OF SEASON AND WATER QUALITY ON OYSTERS (CRASSOSTREA VIRGINICA) AND ASSOCIATED FISH ASSEMBLAGES IN THE CALOOSAHATCHEE RIVER ESTUARY, FLORIDA: IMPLICATIONS OF ALTERED FRESHWATER INFLOW |
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A suite of biological and ecological responses of a Valued Ecosystem Component species, Crassostrea virginica, was used to investigate ecosystem-wide health effects of watershed al...
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IONIC COMPOSITION OF ACID LAKES IN RELATION TO AIRBORNE INPUTS AND WATERSHED CHARACTERISTICS |
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Present acid forming emissions to the atmosphere have the potential to alter significantly the chemistry of rain, snow, and surface water of weakly buffered lakes in the Upper Midw...
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IS IT NECESSARY TO CONTROL POTENTIALLY INFECTIOUS MICROORGANISMS IN ANIMAL WASTES? |
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This presentation will begin with a holistic view of the watershed; considering microbiological water quality needs and how they are influenced by activities in the watershed. It w...
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ISOTOPE EVALUATION OF NITRATE ATTENUATION IN RESTORED AND NATIVE RIPARIAN ZONES IN THE KANKAKEE WATERSHED, INDIANA |
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Isotopic analyses of oxygen and hydrogen of water ( 18O and D) and nitrogen and oxygen of nitrate ( 15N and 18O) are used in conjunction with conventional water chemistry and hyd...
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ISOTOPE HYDROLOGY DYNAMICS OF RIVERINE WETLANDS IN THE KANKAKEE WATERSHED, INDIANA |
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Wetland restoration activities may disturb shallow ground-water flow dynamics. There may be unintentional sources of water flowing into a constructed wetland that could compromise...
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ISOTOPIC COMPOSITIONS OF SULFATE ASSOCIATED WITH THE OXIDATION OF ARSENIAN SULFIDE MINERALOGY IN THE GOOSE RIVER GROUNDWATERSHED, MAINE |
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Geogenic arsenic occurs in groundwater within the polymethamorphic amphibolite-grade Waldoboro Pluton Complex in mid-coastal Maine. A few As water samples exceeded 10 ug l(-1). Par...
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ISOTOPIC EVALUATION OF PB OCCURRENCES IN THE RIVERINE ECOSYSTEMS OF THE KANKAKEE WATERSHED, ILLINOIS-INDIANA. |
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Environmental background levels of Pb were measured in ponds, river waters, sediments, suspended sediments, rocks, and air particulates within the Kankakee watershed during the per...
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ISOTOPIC EVIDENCE FOR NATURALLY OCCURRING SULFATE PONDS IN THE KANKAKEE RIVER BASIN, ILLINOIS-INDIANA |
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Design of constructed wetlands in the Kankakee watershed, Indiana, include pumping and distribution ditches leaving former channelized river levees intact. Resultant changes in sha...
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Impact of Mountaintop Mining/Valley Fill on the Stable Carbon Isotopic Composition and Concentration of Dissolved Organic Carbon and Dissolved Inorganic Carbon in Headwater Streams |
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Headwater streams are the dominant land-water interface across much of the landscape and provide many important ecological services. Cycling and transport of various carbon fractio...
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Impact of Urbanization on Water Quantity and Quality: The Need for an Integrative Watershed Modeling Approach |
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Economic development through natural resource extraction is the primary driver of land use change. Land use change generally occurs as a result of urban development (residential, c...
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Impacts of Urbanization and Intermittent Flow on Macroinvertebrates in Headwater Stream |
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Recent Supreme Court cases have brought increased attention to the contribution of intermittent waters to the health of downstream ecosystems. However, there is still limited knowl...
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Implementation of retrofit BMPs in a suburban watershed via economic incentives |
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Urban stormwater is typically conveyed to centralized infrastructure, and there is great potential for reducing stormwater runoff quantity through decentralization. In this case we...
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Implementation of retrofit best management practices in a suburban watershed (Cincinnati OH) via economic incentives |
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There is great potential for managing stormwater runoff quantity; however, implementation in already-developed areas remains a challenge. We assess the viability of economic incent...
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Influence of Land Use and Watershed Characteristics on Protozoa Contamination in a Potential Drinking Water Resources Reservoir |
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Relative changes in the microbial quality of Lake Texoma, on the border of Texas and Oklahoma, were investigated by monitoring protozoan pathogens, fecal indicators, and factors in...
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JUVENILE COHO SALMON GROWTH AND SURVIVAL ACROSS STREAM NETWORK SEASONAL HABITATS |
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Understanding watershed-scale variation in juvenile salmonid survival and growth can provide insights into factors influencing demographics and can help target restoration and miti...
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KNOW YOUR ESTUARY: THE WATER THROUGH TIME |
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This presentation will focus on historical changes in water quality in the Yaquina Estuary, Oregon, and factors which influence water quality within this estuary. Topics presented...
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LAKE SUPERIOR ORGANIC CARBON BUDGET |
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The organic carbon concentration of Lake Superior is discussed in terms of a simple mathematical model that treats the lake as a well mixed basin. Major sources, outflows, and bioc...
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LAND COVER CHANGE AND LARGE SCALE HYDROLOGIC MODELING OF THE SAN PEDRO RIVER AND CATSKILL/DELAWARE BASINS |
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This study is based on the assumption that land cover change and rainfall spatial variability affect the r-ainfall-runoff relationships on the watershed. Hydrologic response is an ...
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LAND MANAGEMENT AT THE MAJOR WATERSHED - AGROECOREGION INTERSECTION. (R825290) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LAND USE ACTIVITIES AND WESTERN LAKE SUPERIOR WATER QUALITY |
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Geographic Information Systems (GlS), computer systems which can analyze mapped information, can help reduce nonpoint source pollution in the Lake Superior basin by providing resea...
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LAND USE AND NATURAL HYDRAULIC CONTROLS ON STREAM SUBSTRATE AND MACROINVERTEBRATE ASSEMBLAGES IN REGIONAL SURVEYS |
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In large regions, human land uses typically overlay wide ranges of natural geomorphic factors that control stream habitat characteristics and benthic macroinvertebrate assemblages....
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LAND USE AND SEASONAL EFFECTS ON URBAN STORMWATER RUNOFF MICROORGANISM CONCENTRATIONS |
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Stormwater samples collected from storm sewers draining small municipal separate storm sewer systems shown to be free of cross connections within an urban watershed dominated by a ...
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LAND USE AND SEASONAL EFFECTS ON URBAN STORMWATER RUNOFF MICROORGANISM CONCENTRATIONS |
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Stormwater samples collected from storm sewers draining small municipal separate storm sewer systems shown to be free of cross connections within an urban watershed dominated by a ...
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LAND USE IN AREAS OF MIXED OWNERSHIP--A TEST FOR CUMULATIVE WATERSHED EFFECTS ANALYSIS |
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This study is part of the National Network for Environmental Managemsnt Studies conducted under the auspices of the Office of Cooperative Environmental Management--U.S. Environment...
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LAND-COVER CHANGE AND ITS IMPACT ON NUTRIENT EXPORT VARIANCE |
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Conversion of natural or semi-natural vegetation to anthropogenic use is widely cited as one of the principal threats to ecosystems worldwide. One consequence of these landcover co...
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LAND-USE THRESHOLDS AND STREAM MACROINVERTEBRATE ASSEMBLAGES: INFLUENCE OF PHYSIOGRAPHY, WATERSHED SIZE, AND SPATIAL ARRANGEMENT. (R828684C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LAND-USE, ECONOMICS AND HYDROLOGIC IMPACT ASSESSMENT: A SECOND STEP TOWARDS ACHIEVING SUSTAINABLE DEVELOPMENT |
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Past and present development and land-use patterns have drastically altered the hydrologic function of our nation's watersheds. What is only now widely recognized is that the incr...
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LANDSCAPE ASSESSMENT TOOLS FOR WATERSHED CHARACTERIZATION |
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Several steps in identifying and restoring impaired waters (the 303d listing/TMDL development process) can involve landscape-scale analysis to maximize effectiveness while minimizi...
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LANDSCAPE ASSESSMENT TOOLS FOR WATERSHED CHARACTERIZATION |
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A combination of process-based, empirical and statistical models has been developed to assist states in their efforts to assess water quality, locate impairments over large areas, ...
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LANDSCAPE CHANGE IN THE UPPER SAN PEDRO WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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LANDSCAPE CHARACTER AND FISH ASSEMBLAGE STRUCTURE AND FUNCTION IN WESTERN LAKE SUPERIOR STREAMS: GENERAL RELATIONSHIPS AND IDENTIFICATION OF THRESHOLDS |
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As part of a comparative watershed project investigating land cover/land use disturbance gradients for streams in the western Lake Suerior Basin, we wanted to determine the influen...
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LANDSCAPE CORRELATES TO ESTUARINE CONDITION |
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Estuaries are important transition zones between land and sea, yet little is known about how landscapes influence these systems. Using broad scale Environmental Monitoring and As...
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LANDSCAPE INDICATORS OF WATERSHED IMPAIRMENT - NUTRIENTS |
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Abstract for presentation...
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LANDSCAPE INFLUENCES ON IN-STREAM BIOTIC INTEGRITY: USE OF MACROINVERTEBRATE METRICS TO IDENTIFY LANDSCAPE STRESSORS IN HEADWATER CATCHMENTS |
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The biotic integrity of streams is profoundly influenced by quantitative and qualitative features in the landscape of the surrounding catchment. In this study, aquatic macroinvert...
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LANDSCAPE INFLUENCES ON LAKE CHEMISTRY AND OSTRACOD COMMUNITY STRUCTURE OF SMALL DIMICTIC LAKES IN SOUTHERN WISCONSIN DIMICTIC LAKES |
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The natural land cover patterns that characterize the southern part of Wisconsin are legacies of a
glaciated past. Land cover pattern and geomorphology control the hydrologi...
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LANDSCAPE INFLUENCES ON LAKE CHEMISTY OF SMALL DIMICTIC LAKES IN THE HUMAN DOMINATED SOUTHERN WISCONSIN LANDSCAPE |
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Changes in landscape heterogeneity, historic landcover change, and human disturbance regimes are governed by complex interrelated landscape processes that modify lake water quality...
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LANDSCAPE MANAGEMENT FOR RESTORATION OF AGRICULTURAL WATERSHEDS |
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As part of CEAP, we conducted a review of the available literature on landscape management to achieve improvement of water quality, water quantity, soil quality, and air quality in...
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LANDSCAPE MANAGEMENT PRACTICES |
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USDA Conservation Practices are applied at various scales ranging from a portion of a field or a specific farm operation to the watershed or landscape scale. The Conservation Effe...
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LANDSCAPE METRICS THAT ARE USEFUL FOR EXPLAINING ESTUARINE ECOLOGICAL RESPONSES |
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We investigated whether land use/cover characteristics of watersheds associated with estuaries exhibit a strong enough signal to make landscape metrics useful for predicting estuar...
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LANDSCAPE MODELING OF SURFACE WATER FLOW: 2. PATUXENT WATERSHED CASE STUDY. (R827169) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LANDSCAPE MONITORING AND ASSESSMENT RESEARCH PLAN |
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Recognition of the importance of landscape attributes: and processes in determining ecological status and trends has increased over the past few years, Landscape patterns are now c...
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LANDSCAPE PATTERN CORRELATES OF STREAM CONDITION AND IMPLICATIONS FOR ASSESSING ALTERNATIVE FUTURE SCENARIOS FOR WATERSHED MANAGEMENT: AN EXAMPLE FROM THE U.S. MID-ATLANTIC REGION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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LANDSCAPE SCALE INDICATORS OF MINING ACTIVITY |
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Ecological indicators of stress are used by the Environmental Monitoring and Assessment Program (EMAP) to quantify the status, trends and changes of ecological goods and services. ...
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LANDSCAPE-LEVEL INDICATORS IN SMALL GEORGIA WATERSHEDS |
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Landscape level indicators in small watersheds can be used as a screening tool to guide in-situ monitoring to confirm stream condition problems, aid listing of impaired waters unde...
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LARGE AREA LAND COVER MAPPING THROUGH SCENE-BASED CLASSIFICATION COMPOSITING |
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Over the past decade, a number of initiatives have been undertaken to create definitive national and global data sets consisting of precision corrected Landsat MSS and TM scenes. O...
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LARGE-SCALE PATTERNS OF STREAMFLOW DISTURBANCE AND FISH COMMUNITIES IN UPPER MISSOURI RIVER BASIN, USA |
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Patterns of streamflow variability are likely to be a major organizing feature of the habitat template for stream fishes. Functional organization of stream communities has been li...
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LEACHING MODELS FOR SUBSURFACE POLLUTION ASSESSMENT IN AGROECOSYSTEMS |
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Unrestricted use of pesticides in agriculture threatens ground-water resources and can have adverse ecological impact on the nation's receiving surface waters. In this paper, we de...
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LEAF DECAY IN STREAMS ALONG A GRADIENT OF WATERSHED LAND USE. (R824777) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LEVEL OF TAXONOMIC RESOLUTION AND THE RESPONSE OF LOTIC INVERTEBRATE COMMUNITIES TO INCREASED WATERSHED IMPERVIOUSNESS. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LIFE HISTORY MONITORING OF SALMONIDS IN THE WEST FORK SMITH RIVER, UMPQUA BASIN, OREGON |
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As a life-cycle monitoring basin for the Oregon Salmon Plan, the Oregon Department of Fish and Wildlife has estimated adult returns, distribution and smolt outmigration of coho, c...
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LIMNOLOGICAL OPTOMETRY: EXAMINING EARTH'S EYE |
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In Thoreau's Walden, a lake is described as the landscape's most expressive feature and the earth's eye. Collectively, scientists are charged by society to assess, monitor, and rem...
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LINKAGES BETWEEN WATERSHED DEVELOPMENT, STREAMS, AND RECEIVING SALT MARSHES |
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Poster presentation at a scientific meeting...
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LINKAGES OF P AND AL EXPORT AT HIGH DISCHARGE AT THE BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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LINKING GREAT WATERSHEDS AND RIVERS TO FORECAST THE IMPACT OF NUTRIENTS ON LARGE RECEIVING WATERS |
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Assessment of our nation's waters, as per sections 305(b) and 303(d) of the Clean Water Act, indicates that approximately 40% are impacted by chemical and non-chemical stressors th...
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LINKING LAND COVER AND WATER QUALITY IN NEW YORK CITY'S WATER SUPPLY WATERSHEDS |
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The Catskill/Delaware reservoirs supply 90% of New York City's drinking water. The City has implemented as series of watershed protection measures, including land acquisition, aim...
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LOCAL RIPARIAN VERSUS WATERSHED INFLUENCE ON CHEMICAL AND MACROINVERTEBRATE INDICATORS OF STREAM WATER QUALITY IN TWO REGIONAL SURVEYS |
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We compiled data from regional stream surveys in two areas of the U.S. to examine whether indicators of human disturbance at the local riparian scale (e.g., site canopy density, ri...
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LOCAL RIPARIAN VERSUS WATERSHED INFLUENCE ON MACROINVERTEBRATE AND CHEMICAL INDICATORS OF STREAM CONDITION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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LOCATING BURIED WORLD WAR 1 MUNITIONS WITH REMOTE SENSING AND GIS |
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Remote Sensing is a scientific discipline of non-contact monitoring. It includes a range of technologies that span from aerial photography to advanced spectral imaging and analyti...
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LOCATING LEAKS WITH ACOUSTIC TECHNOLOGY |
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Many water distribution systems in this country are almost 100 years old. About 26 percent of piping in these systems is made of unlined cast iron or steel and is in poor condition...
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LONG-TERM AND SEASONAL VARIATIONS IN CO2; LINKAGES TO CATCHMENT ALKALINITY GENERATION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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LONG-TERM CHANGES IN WATERSHED NUTRIENT INPUTS AND RIVERINE EXPORTS IN THE NEUSE RIVER, NORTH CAROLINA. (U915590) |
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We compared patterns of historical watershed nutrient inputs with in-river nutrient loads for the Neuse River, NC. Basin-wide sources of both nitrogen and phosphorus have increa...
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LONG-TERM CHANGES IN WATERSHED RETENTION OF NITROGEN: ITS CAUSES AND AQUATIC CONSEQUENCES |
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Nitrogen saturation is defined as a situation where the supply of nitrogenous compounds from the atmosphere exceeds the demand for these compounds on the part of watershed plants a...
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LONG-TERM DISTRIBUTIONS OF ANNUAL SEDIMENT YIELDS FROM SMALL WATERSHEDS |
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Annual sediment yields from small (< 20 sq km) mountain watersheds in the northwestern United States are approximately log normally distributed over time. Stochastic sediment yield...
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LONG-TERM RECOVERY OF PCB-CONTAMINATED SURFACE SEDIMENTS AT THE SANGAMO-WESTON/TWELVEMILE CREEK/LAKE HARTWELL SUPERFUND SITE |
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Natural recovery of contaminated sediments relies on burial of contaminated sediments with increasingly clean sediments over time (i.e., natural capping). Natural capping reduces t...
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Landscape Thresholds and the Condition of Northeastern Estuaries |
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Anthropogenic impacts to northeastern estuaries have been well documented and many researchers have quantified the associations between broad scale human land uses in contributing ...
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Larval salamanders and channel geomorphology are indicators of hydrologic permanence in forested headwater streams |
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Regulatory agencies need rapid indicators of hydrologic permanence for jurisdictional determinations of headwater streams. Our study objective was to assess the utility of larval s...
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Linking Watershed Atrazine and PCB Loads to Lake Michigan |
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An introduction, overview, and results of mathematical modeling in Lake Michigan. The presentation focuses on model mass balances and forecasts for atrazine and PCBs. The mass ba...
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MACROINVERTEBRATE RESPONSE TO LAND USE AND STREAM CHEMISTRY IN THE MID-ATLANTIC COASTAL PLAINS |
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Many States and Regions have begun incorporating landscape and biotic integrity into their Total Maximum Daily Load (TMDL) process. Due to time, money, and man power constraints on...
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MAKING WATERSHED PARTNERSHIPS WORK: A REVIEW OF THE EMPIRICAL LITERATURE. (R827145) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MANAGEMENT OF DIFFUSE POLLUTION IN AGRICULTURAL WATERSHEDS: LESSONS FROM THE MINNESOTA RIVER BASIN. (R825290) |
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AbstractThe Minnesota River (Minnesota, USA) receives large non-point source pollutant loads. Complex interactions between agricultural, state agency, environmental gro...
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MANAGEMENT OF WET-WEATHER FLOW IN THE URBAN WATERSHED |
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This chapter covers the control and treatment of stormwater in relation to the removal or reduction of the stormwater pollutant loads. The control of stormwater to prevent flooding...
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MANAGING AT THE INTERFACE: DOES AGROECOREGION, WATERSHED, OR THEIR INTERSECTION BEST EXPLAIN THE VARIANCE IN STREAM INVERTEBRATE COMMUNITIES. (R825290) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MANAGING MICROBIAL CONTAMINATION IN URBAN WATERSHEDS |
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This paper presents different approaches for controlling pathogen contamination in urban watersheds for contamination resulting from point and diffuses sources. Point sources of pa...
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MANAGING MICROBIAL CONTAMINATION IN URBAN WATERSHEDS |
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This paper presents different approaches for controlling pathogen contamination in urban watersheds for contamination resulting from point and diffuse sources. Point sources of pa...
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MANAGING RISKS USING MEASUREMENTS OF STREAM COMMUNITY METABOLISM, NUTRIENT AND SEDIMENT DYNAMICS AND GEOMORPHOLOGY IN THE LMR WATERSHED |
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The goal of this project, and associated research, is to establish thresholds for ecological response to watershed disturbance and to develop tools and insights that will help us m...
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MANAGING URBAN WATERSHED PATHOGEN CONTAMINATION |
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This document is written as a resource for state and local watershed managers who have the responsibility of managing pathogen contamination in urban watersheds. In addition it ca...
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MANAGING URBAN WATERSHED PATHOGEN CONTAMINATION |
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This document is written as a resource for state and local watershed managers who have the responsibility of managing pathogen contamination in urban watersheds. In addition it ca...
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MANAGING URBAN WATERSHED PATHOGEN CONTAMINATION |
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This presentation is a summary of the EPA National Risk Management Research Laboratory (NRMRL) publication entitled Managing Urban Watershed Pathogen Contamination, EPA/600/R-03/11...
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MANAGING WATERBORNE PATHOGENS ASSOCIATED WITH CONCENTRATED ANIMAL FEEDING OPERATIONS |
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Pathogenic microorganisms of fecal origin are the leading cause of river and stream impairments in the United States. Runoff from agricultural operations, particularly animal agric...
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MAPPING DYNAMIC STREAM NETWORKS AND ASSESSING THEIR SIGNIFICANCE ON WATER QUALITY |
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Little is known about how active stream network expansion during rainstorms influences the ability of riparian buffers to improve water quality. We used aerial photographs to quant...
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MAPPING WATERSHED BOUNDARIES USING DIGITAL ELEVATION DATA: SOME IMPLICATIONS FOR AQUATIC ASSESSMENT. (R828684C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MARINE AEROSOLS ALTER SOIL PROCESSES IN COASTAL FORESTS |
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Most models of watershed biogeochemistry include the movement of materials from land to rivers and eventually the ocean. Few conceptual views, however, acknowledge the influence o...
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MARKET INCENTIVES AND NONPOINT SOURCES: AN APPLICATION OF TRADABLE CREDITS TO URBAN STORMWATER MANAGEMENT |
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Excess stormwater runoff can cause serious pollution, habitat degradation and flooding in cities where growth in impervious surface area (such as pavement, buildings, etc.) has cre...
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MARYLAND AGRICULTURE AND YOUR WATERSHED |
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Using primarily 1995 State of Maryland agricultural statistics data, a new methodology was demonstrated with which State natural resource managers can analyze the areal ext...
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MAXIMUM UTILIZATION OF WATER RESOURCES IN A PLANNED COMMUNITY |
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An ecologically planned community (The Woodlands, Texas) has adopted a unique water management plan designed to avoid adverse water quality and hydrological effects due to urbaniza...
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MAXIMUM UTILIZATION OF WATER RESOURCES IN A PLANNED COMMUNITY. STORMWATER RUNOFF QUALITY: DATA COLLECTION, REDUCTION AND ANALYSIS |
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Stormwater from four watersheds in the Houston area was monitored over a three year period. Land use in the watershed included undeveloped forest, developing forest, fully-develope...
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MAXIMUM UTILIZATION OF WATER RESOURCES IN A PLANNED COMMUNITY: EUTROPHICATION POTENTIAL OF SURFACE WATERS IN A DEVELOPING WATERSHED |
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The purpose of this research was to characterize the algal populations in a developing area (The Woodlands) to evaluate the impact of urbanization on the aquatic flora in The Woodl...
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MEASURES OF GENETIC DIVERSITY ARE EFFECTIVE TOOLS FOR EVALUATING ENVIRONMENTAL CONDITION |
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At their core, ecological risk assessments aim to evaluate the biological integrity and long-term sustainability of natural ecosystems. These are difficult objectives that will ul...
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MEASURING METAL SULFIDE COMPLEXES IN OXIC RIVER WATERS WITH SQUARE WAVE VOLTAMMETRY. (R825395) |
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A sulfide identification protocol was developed to quantify specific metal
sulfides that could exist in river water. Using a series of acid additions,
nitrogen purges, a...
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MEETING IN PHILADELPHIA: NUTRIENT CONCENTRATIONS IN FLOWING WATERS OF THE SOUTH FORK BROAD RIVER, GEORGIA WATERSHED |
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The objective of this poster is by comparing nutrient and DOM concentrations in small and large streams, we hope to better understand: (1) watershed controls on stream nutrient and...
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MEETING THE REQUIREMENTS OF THE U.S. SAFE DRINKING WATER ACT: THE ROLE OF TECHNOLOGY |
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The passage of the U.S. Safe Drinking Water Act (SDWA) in 1974 has had a major impact on the way water is treated and delivered in the United States. The Act established national ...
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MEETING THE REQUIREMENTS OF THE U.S. SAFE DRINKING WATER ACT: THE ROLE OF TECHNOLOGY |
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The passage of the U.S. Safe Drinking Water Act (SDWA) in 1974 has had a major impact on the way water is treated and delivered in the United States. The Act established national ...
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MERCURY AND STABLE ISOTPOES OF CARBON AND NITROGEN IN MINK |
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The total mercury concentrations, δ15N and δ13C in tissues of mink (Mustela vison) captured in Rhode Island during winters of the years 1999-2004 showed samples to be statisticall...
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MERCURY CONTAMINATION OF SUBSISTENCE FISHERIES ON TRIBAL LANDS: A PARTNERSHIP OF ORD, REGION 8 AND CHEYENNE RIVER SIOUX RESERVATION |
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In a prior collaborative 3 year study with the Cheyenne River Sioux Tribe Department of Environmental Protection (CRST DEP), and the Agencies' Environmental Response Team, RegionVI...
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MERCURY DEPOSITIOIN AND WATER QUALITY TRENDS IN THE UPPER MIDWEST, USA |
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Total wet mercur deposition was monitored weekly at six Upper-Midwest USA sites for a period of six years, 1990-95, to assess temporal and spatial pattern, and contributions to sur...
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MERCURY DEPOSITION AND LAKE QUALITY TRENDS |
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Watershed factors influence the differing trends in mercury residue levels. Fish mercury concentrations show positive correlations with water color, methylmercury concentrations, ...
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MERCURY DEPOSITION AND WATER QUALITY IN THE UPPER MIDWEST, USA |
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Total wet mercury deposition was monitored weekly at six Upper-Midwest, USA sites for a period of six years, 1990-195, to assess temporal and spatial patterns, and contributions to...
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MERCURY DEPOSITION AND WATER QUALITY TRENDS IN THE UPPER MIDWEST, USA |
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Watershed factors influence the differing trends in mercury residue levels. Fish mercury concentrations show positive correlations with water color, methylmercury concentrations, ...
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MERCURY RISK MANAGEMENT IN LIVESTOCK PONDS ON THE CHEYENNE RIVER SIOUX RESERVATION |
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In a prior collaborative 3 year study with the Cheyenne River Sioux Tribe Department of Environmental Protection (CRST DEP), and the Agencies' Environmental Response Team, RegionVI...
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METHODOLOGIES FOR CALIBRATION AND PREDICTIVE ANALYSIS OF A WATERSHED MODEL |
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The use of a fitted-parameter watershed model to address water quantity and quality management issues requires that it be calibrated under a wide range of hydrologic conditions. Ho...
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METHODOLOGY FOR EVALUATING THE EFFECTIVENESS OF NONPOINT SOURCE POLLUTION ABATEMENT PROGRAMS |
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The Upper Big Walnut Creek watershed encompasses 190 square miles of predominantly agricultural cropland (65%) in Central Ohio (USA) where agronomic fertilizers and herbicides are ...
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METHODS FOR MULTI-SPATIAL SCALE CHARACTERIZATION OF RIPARIAN CORRIDORS |
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This paper describes the application of aerial photography and GIS technology to develop flexible and transferable methods for multi-spatial scale characterization and analysis of ...
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METHODS MODULE |
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The ultimate goal of classification is to reduce variation within classes to enable detection of differences between reference and impacted condition within classes as cost-effecti...
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MICROBIAL ACTIVITY: AN INDICATOR OF WATERSHED IMPACTRS ON RIVERINE COASTAL WETLANDS OF LAKE MICHIGAN |
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The loss of watershed storage and/or forest cover due to land use, is expected to increase nutrient levels and sedimentation in the riverine coastal wetlands. Watershed indicators ...
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MICROBIAL ACTIVITY: AN INDICATOR OF WATERSHED IMPACTS ON RIVERINE COASTAL WETLANDS OF LAKE MICHIGAN |
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The loss of watershed storage and/or forest cover due to land use, is expected to increase nutrient levels and sedimentation in the riverine coastal wetlands. Watershed indicators ...
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MICROBIAL ENZYME ACTIVITY FOR CHARACTERIZING NUTRIENT LOADING TO GREAT LAKES COASTAL WETLANDS |
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Energy and material flows in aquatic ecosystems are mediated by microbial carbon and nutrient cycling. Extracellular enzymes produced by the microbial community aid in the degradat...
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MICROBIAL MOBILIZATION OF ARSENIC FROM SEDIMENTS OF THE ABERJONA WATERSHED. (R823222) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MICROBIAL SOURCE TRACKING - STATE OF SCIENCE |
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Water quality of the Nation's lakes, rivers and streams has been monitored since the passage of the Clean Water Act in 1972. Although these waters have been monitored for 30 years...
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MICROBIAL SOURCE TRACKING - WHERE ARE WE NOW AND WHERE ARE WE GOING? |
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Microbial Source Tracking ? Where Are We Now and Where Are We Going?
J. W. Santo-Domingo1, J. M. Simpson1, G. Scott2 and D. J. Reasoner1
1U.S. Environmental Protection Ag...
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MICROORGANISM DIE-OFF RATES UNDER VARIOUS CONDITIONS |
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New York-New Jersey (NY-NJ) Harbor Estuary Program is charged to undertake an assessment of New York City Combined Sewer Overflow (NYC CSO) model for use in developing Total Maximu...
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MICROORGANISMS DIE-OFF RATES IN URBAN STORMWATER RUNOFF |
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Urban stormwater runoff, a leading cause of water quality impairment related to human activities in lakes and reservoirs, can have significant negative effects on receiving water q...
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MICROORGANISMS DIE-OFF RATES IN URBAN STORMWATER RUNOFF - 2005 VERSION |
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Urban stormwater runoff is a leading cause of water quality impairment in lakes and reservoirs. Stormwater discharges, with latent bacterial loads, can negatively impact receiving ...
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MICROORGANISMS DIE-OFF RATES IN URBAN STORMWATER RUNOFF, 2006 |
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Urban stormwater runoff is a leading cause of water quality impairment related to human activities in lakes and reservoirs. It can have significant negative effects on receiving wa...
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MID-ATLANTIC COASTAL STREAMS STUDY: STATISTICAL DESIGN FOR REGIONAL ASSESSMENT AND LANDSCAPE MODEL DEVELOPMENT |
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A network of stream-sampling sites was developed for the Mid-Atlantic Coastal Plain (New Jersey through North Carolina) a collaborative study between the U.S. Environmental Protect...
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MID-ATLANTIC COASTAL STREAMS STUDY: STATISTICAL DESIGN FOR REGIONAL ASSESSMENT AND LANDSCAPE MODEL DEVELOPMENT |
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A network of stream-sampling sites was developed for the Mid-Atlantic Coastal Plain (New Jersey through North Carolina) as part of collaborative research between the U.S. Environme...
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MID-ATLANTIC LANDSCAPE INDICATORS PROJECT PLAN |
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Landscapes are described by the spatial arrangements of ecological resources. he Project Plan details an approach that examines landscape patterns relative to their affect on the f...
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MIDDLE PLATTE RIVER WATERSHED |
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What is an ecological risk assessment? An ecological risk assessment evaluates the potential adverse effects of human activities on the plants and animals tha...
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MINERAL SOIL AND SOLUTION RESPONSES TO EXPERIMENTAL N AND S ENRICHMENT AT THE BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MINERAL WEATHERING RATES FROM SMALL-PLOT EXPERIMENTS, WMP SITE, BEAR BROOKS, MAINE |
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The pH-dependence of silicate mineral weathering rates was measured in small-plot experiments at the Bear Brooks Watershed Manipulation Project site in Maine, U.S.A. ix 2 m2 plots ...
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MISSING THE STORM: PREDICTING SEDIMENT EXPORT FROM BASEFLOW CONDITIONS IN LOW-ORDER LAKE SUPERIOR WATERSHEDS |
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Midwestern streams export most of their annual sediment load during snowmelt and rainfall events, however measuring sediment export at peak stream discharges is not always possible...
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MOBILIZATION OF ALUMINUM IN A NATURAL SOIL SYSTEM: EFFECTS OF HYDROLOGIC PATHWAYS |
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A two-component soil water flow model was used with an equilibrium speciation model WATEQF to study aluminum mobility in soils of a forested watershed. Analysis of soil solution sa...
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MODEL ANALYSIS OF RIPARIAN BUFFER EFFECTIVENESS FOR REDUCING NUTRIENT INPUTS TO STREAMS IN AGRICULTURAL LANDSCAPES |
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Federal and state agencies responsible for protecting water quality rely mainly on statistically-based methods to assess and manage risks to the nation's streams, lakes and estuari...
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MODELING FRAMEWORK FOR EVALUATING SEDIMENTATION IN STREAM NETWORKS: FOR USE IN SEDIMENT TMDL ANALYSIS |
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A modeling framework that can be used to evaluate sedimentation in stream networks is described. This methodology can be used to determine sediment Total Maximum Daily Loads (TM...
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MODELING GROUND WATER/SURFACE WATER INTERACTIONS FROM WELL TO WATERSHED SCALES: IMPLICATIONS FOR SAFE AND CLEAN WATER |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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MODELING IMPACTS OF ACID PRECIPITATION FOR NORTHEASTERN MINNESOTA |
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The acidification of lakes and streams due to acid precipitation has been documented in southern Sweden and Norway, the northeastern United States and southern Ontario. Geochemistr...
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MODELING LONG-TERM NITRATE BASE-FLOW LOADING FROM TWO AGRICULTURAL WATERSHEDS |
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Nitrate contamination of ground water from agricultural practices may be contributing to the eutrophication of the Chesapeake Bay, degrading water quality and aquatic habitats. Gro...
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MODELING MERCURY BEHAVIOR IN A CONTAMINATED DESERT STREAM AND CONSTRUCTED WETLAND |
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The Steamboat Creek (SBC) watershed is highly contaminated with mercury and is considered the most polluted tributary of the Truckee River. Restoration is being considered at its ...
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MODELING MERCURY DYNAMICS IN STREAM SYSTEMS WITH WASP7: CHARACTERIZING PROCESSES CONTROLLING SHORT AND LONG TERM RESPONSE |
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Mercury transport through stream ecosystems is driven by a complicated set of transport and transformation reactions operating on a variety of scales in the atmosphere, landscape, ...
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MODELING MERCURY FATE IN SEVEN GEORGIA WATERSHEDS |
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Field and modeling studies were conducted in support of total maximum daily loads (TMDLs)for mercury in six south Georgia rivers and the Savannah River. Mercury is introduced to t...
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MODELING MERCURY FLUXES AND CONCENTRATIONS IN A GEORGIA WATERSHED RECEIVING ATMOSPHERIC DEPOSITION LOAD FROM DIRECT AND INDIRECT SOURCES |
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This paper presents a modeling analysis of airborne mercury deposited onto the Ochlockonee River watershed located in Georgia, USA. Atmospheric deposition monitoring and source att...
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MODELING MERCURY IN STREAM ECOSYSTEMS |
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Mercury is a classic multimedia pollutant. Natural and anthropogenic emissions are driven by a complicated set of transport and transformation reactions operating on a variety of s...
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MODELING MINERAL NITROGEN EXPORT FROM A FOREST TERRESTRIAL ECOSYSTEM TO STREAMS |
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Terrestrial ecosystems are major sources of N pollution to aquatic ecosystems. Predicting N export to streams is a critical goal of non-point source modeling. This study was cond...
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MODELING OF LONG-TERM LAKE ALKALINITY RESPONSES TO ACID DEPOSITION |
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A watershed acidification model for two New York state lakes was verified by simulating an additional year of field data that was excluded during the calibration period. he finding...
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MODELING OF SEDIMENT YIELD IN A SMALL AGRICULTURAL WATERSHED WITH KINEROS2 |
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Sediment is a major pollutant of stream waters and serves as carriers for various pesticides, radioactive materials and nutrients. Therefore, development and implementation of BMPs...
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MODELING PHYSICAL HABITAT PARAMETERS |
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Salmonid populations can be affected by alterations in stream physical habitat. Fish productivity is determined by the stream's physical habitat structure ( channel form, substrate...
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MODELING POTENTIAL PATHOGEN INFECTED WATERS UTILIZING LANDSCAPE INDICES |
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The federal Clean Water Act (CWA) requires states, territories and tribal lands to assess their waters on a biennial schedule and identify, list and prioritize impaired waters not ...
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MODELING PROCESSES CONTROLLING MERCURY FATE IN WATERSHEDS RECEIVING ATMOSPHERIC DEPOSITION - COMPARISON OF FIELD SCALE GLEAMS AND WATERSHED SCALE WCS-GBMM |
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Long-term simulations of mercury fate in watersheds are needed to support regulations such as TMDLs and to predict the effectiveness of regulatory proposals, such as the Clean Air ...
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MODELING THE DYNAMICS OF WILDLIFE HABITAT AND POPULATIONS AT THE LANDSCAPE SCALE |
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A forest dynamics model (FORCLIM) was linked to a spatial wildlife population model (PATCH) to assess the effects of habitat change in a landscape on selected wildlife species. Th...
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MODELING THE IMPACTS OF LAND USE CHANGE ON HYDROLOGY AND WATER QUALITY OF A PACIFIC NORTHWEST WATERSHED |
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In many parts of the world, aquatic ecosystems are threatened by hydrological and water quality alterations due to extraction and conversion of natural resources for agriculture, u...
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MODELING TO EVOLVE UNDERSTANDING OF THE SHALLOW GROUND WATER FLOW SYSTEM BENEATH THE LIZZIE RESEARCH SITE, NC |
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The purpose of the modeling effort presented here is to evolve a conceptual model of ground-water flow at the Lizzie, NC research site using analytic solutions and field observatio...
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MODELING TOOLS FOR ASSESSING LANDSCAPE-LEVEL DETERMINANTS OF FISH PRODUCTION: EXAMPLES FROM WESTERN OREGON |
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Most studies addressing relationships between salmonids and factors that affect their freshwater production have focused on small areas and short time frames. Limits of understandi...
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MODELING TOOLS USED FOR MERCURY TMDLS IN GEORGIA RIVERS |
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The Clean Water Act and associated regulations require each State to identify waters not meeting water quality standards applicable to their designated uses. Total maximum daily l...
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MODELING UNCERTAINTY OF RUNOFF AND SEDIMENT YIELD IN TWO EXPERIMENTAL WATERSHEDS |
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Sediment loading from agriculture is adversely impacting surface water quality and ecological conditions. In this regard, the use of distributed hydrologic models has gained accept...
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MODELING UNCERTAINTY OF RUNOFF AND SEDIMENT YIELD USING A DISTRIBUTED HYDROLOGIC MODEL |
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The event- and physically-based runoff and erosion model KINEROS2 is applied to assess the impact of uncertainty in model parameters on simulated hydrographs and sediment discharge...
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MODELING WATER QUALITY AND THE EFFECTS OF AGRICULTURAL BEST MANAGEMENT PRACTICES IN FOUR MILE CREEK, IOWA |
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This report describes an initial attempt to combine the detailed simulation of agricultural runoff and soil processes, which calculates surface and subsurface pollutant transport t...
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MODELING WATER QUALITY AND THE EFFECTS OF AGRICULTURAL BMPS (BEST MANAGEMENT PRACTICES) IN THE IOWA RIVER BASIN |
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This paper describes a demonstration application of comprehensive hydrology and water quality modeling on a large river basin to evaluate the effects of agricultural nonpoint pollu...
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MOLECULAR DETECTION OF CRYPTOSPORIDIUM OOCYSTS IN WATER: THE CHALLENGE AND PROMISE |
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Because of the presence of host-adapted Cryptosporidium species and genotypes, molecular tools can help assess the source and hazardous potential of Cryptosporidium oocysts in wate...
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MOLECULAR EVALUATION OF CHANGES IN PLANKTONIC BACTERIAL POPULATION RESULTING FROM EQUINE FECAL CONTAMINATION IN A SUB-WATERSHED |
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Contamination of watersheds by fecal bacteria is a frequent cause for surface waters to be placed on the national impaired waters list. However, since the presence of fecal bacteri...
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MOLECULAR EVALUATION OF CHANGES IN PLANKTONIC BACTERIAL POPULATIONS RESULTING FROM EQUINE FECAL CONTAMINATION IN A SUB-WATERSHED |
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Considerable emphasis has been placed on developing watershed-based strategies with the potential to reduce non-point-source fecal contamination. Molecular methods applied used 16S...
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MOLECULAR TRACKING FECAL CONTAMINATION IN SURFACE WATERS: 16S RDNA VERSUS METAGENOMICS APPROACHES |
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Microbial source tracking methods need to be sensitive and exhibit temporal and geographic stability in order to provide meaningful data in field studies. The objective of this stu...
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MONITORING CULVERT PASSAGE OF JUVENILE SALMONIDS WITH PIT TAGS AND STATIONARY AND PORTABLE PIT-TAG READERS |
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Federal land management agencies in the PNW face increasing pressure to replace culverts that do not pass all life history stages of anadromous salmon and trout. Prioritization of...
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MONITORING ENVIRONMENTAL QUALITY AT THE LANDSCAPE SCALE: USING LANDSCAPE INDICATORS TO ASSESS BIOTIC DIVERSITY, WATERSHED INTEGRITY, AND LANDSCAPE STABILITY |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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MONITORING OF A BEST MANAGEMENT PRACTICE POND |
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The USEPA's Urban Stormwater Management Branch has monitored stormwater drainage and best management practices (BMP) as part of its research program. One BMP being monitored, a wet...
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MONITORING OF A BEST MANAGEMENT PRACTICE POND IN THE STATEN ISLAND BLUEBELL |
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The USEPA's Urban Stormwater Management Branch has monitored stormwater drainage and best management practices (BMP) as part of its research program. One BMP being monitored, a wet...
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MONITORING OF A BEST MANAGEMENT PRACTICE POND IN THE STATEN ISLAND BLUEBELT |
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The USEPA’s Urban Watershed Management Branch has monitored stormwater drainage and best management practices (BMP) as part of its research program. One BMP being monitored is a r...
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MONITORING OF A RETENTION POND BEFORE AND AFTER MAINTENANCE |
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The USEPA’s Urban Watershed Management Branch has monitored stormwater drainage and best management practices (BMP) as part of its research program. One BMP being monitored is a r...
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MONITORING OF A RETENTION POND FOR EFFECTS OF MAINTENANCE |
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The USEPA’s Urban Watershed Management Branch has monitored stormwater drainage and best management practices (BMP) as part of its research program. One BMP monitored was a retenti...
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MONITORING SPAWNING GRAVEL IN MANAGED FORESTED WATERSHEDS: A PROPOSED PROCEDURE |
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Silvicultural activities in the Pacific Northwest introduce various levels of sediments and debris into streams, often degrading spawning habitats of salmonid fishes. In these moun...
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MONITORING THE ACCOTINK CREEK STREAM RESTORATION |
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Since the inception of the Clean Water Act (CWA) in 1972, the United States has made great efforts in restoring and preserving the physical, chemical, and biological integrity of t...
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MONITORING THE RESPONSE TO CHANGING MERCURY DEPOSITION |
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There is a crucial need to document the impact and effectiveness of regulation of anthropogenic mercury (Hg) emissions on human, wildlife and ecosystem health to ascertain the need...
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MUDDY WATERS: LINKING FOREST LAND USE, SEDIMENT TRANSPORT, AND RESERVOIR OPERATION TO MUNICIPAL WATER QUALITY IN THE NORTH SANTIAM WATERSHED, OREGON. (R825822) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MULTIDISCIPLINARY MANAGEMENT OF STORMWATER RUNOFF - THE SHEPHERD CREEK WATERSHED PILOT STUDY |
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Increased stormwater runoff from urbanized areas is a primary degrading influence on environmental quality. In addition to ecological, hydrological, and consideration of soils and ...
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MULTIMEDIA INTEGRATED MODELING FOR ENVIRONMENTAL PROTECTION: INTRODUCTION TO A COLLABORATIVE FRAMEWORK |
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The EPA's Office of Research and Development is embarking on a long term project to develop a Multimedia Integrated Modeling System (MIMS). The system will have capabilities to re...
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MULTISCALE RELATIONSHIPS OF LANDSCAPE CHARACTERISTICS AND NITROGEN CONCENTRATIONS IN STREAMS |
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There have been numerous papers reporting relationships between watershed andlandscape characteristics and chemnical, physical,m and biological attributes of streams (see summary i...
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MULTIVARIATE ANALYSIS OF DIATOM ASSEMBLAGES IN STREAMS IN TWO HYDROGEOMORPHIC REGIONS WITHIN THE NORTHERN LAKES AND FOREST ECOSYSTEM |
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An ordination approach was used to explore relationships among macroinvertebrate, habitat and landscape variables associated with diatom assemblages in streams within the Northern ...
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Managing Saginaw Bay nutrient loading by surrounding watersheds through near real time hydrologic resource sheds |
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We can quantify source areas contributing material to a location during various time periods as resource sheds. Various kinds of resource sheds and their source material distributi...
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Modeled Watershed Runoff Associated with Variations in Precipitation Data with Implications for Contaminant Fluxes |
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Watershed-scale fate and transport models are important tools for estimating the sources, transformation, and transport of contaminants to surface water systems. Precipitation is o...
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Modeled Watershed Runoff Associated with Variations in Precipitation Data, with Implications for Contaminant Fluxes: Initial Results |
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Precipitation is one of the primary forcing functions of hydrologic and watershed fate and transport models; however, in light of advances in precipitation estimates across watersh...
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Modeling Watershed Mercury Response to Atmospheric Loadings: Response Time and Challenges |
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The relationship between sources of mercury to watersheds and its fate in surface waters is invariably complex. Large scale monitoring studies, such as the METAALICUS project, have...
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Multiobjective Sensitivity Analysis Of Sediment And Nitrogen Processes With A Watershed Model |
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This paper presents a computational analysis for evaluating critical non-point-source sediment and nutrient (specifically nitrogen) processes and management actions at the watershe...
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N2O EMISSIONS FROM STREAMS IN THE NEUSE RIVER WATERSHED, NORTH CAROLINA |
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The paper presents N2O emission data from 11 sites in the Neuse River watershed. Emissions were measured using a static surface enclosure technique deployed on eight sit...
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NATIONAL CONFERENCE ON URBAN STORM WATER: ENHANCING PROGRAMS AT THE LOCAL LEVEL - PROCEEDINGS CHICAGO, IL FEBRUARY 17-20, 2003 |
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A wide array of effective storm water management and resource protection tools have been developed for urban environments, but their implementation continues to be hampered by a la...
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NATIONAL RESEARCH NEEDS CONFERENCE PROCEEDINGS: RISK-BASED DECISION MAKING FOR ONSITE WASTEWATER TREATMENT |
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The Research Needs Conference Proceedings consist of a description of the background for the project and a series of white papers on the topics of integrated risk assessment/manage...
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NATIONAL STREAM SURVEY DATABASE GUIDE |
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The National Stream Survey (NSS), conducted in the spring of 1985 and 1986, is one component of the U.S Environmental Protection Agency's National Surface Water Survey. This effort...
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NEAR-STREAM LANDUSE EFFECTS ON STREAMWATER NUTRIENT DISTRIBUTION IN AN URBANIZING WATERSHED. (U915530) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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NEKTON USE OF SALT MARSHES ALONG A GRADIENT OF WATERSHED LAND USE |
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Platform presentation at a scientific conference...
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NET ANTHROPOGENIC PHOSPHORUS INPUTS; SPATIAL AND TEMPORAL VARIABILITY IN THE CHESAPEAKE BAY REGION |
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Coastal watershed eutrophication has increasingly become a regional and global issue as larger proportions of the earth’s human population settle in coastal areas. Human activitie...
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NEW GIS WATERSHED ANALYSIS TOOLS FOR SOIL CHARACTERIZATION AND EROSION AND SEDIMENTATION MODELING |
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A comprehensive procedure for computing soil erosion and sediment delivery metrics has been developed which utilizes a suite of automated scripts and a pair of processing-intensive...
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NEW YORK CITY'S WATER SUPPLY: A 25 YEAR LANDSCAPE ANALYSIS OF THE CATSKILL/DELAWARE WATERSHEDS |
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A number of water bodies located within the New York City's water supply system are impaired
by nutrients, pathogens and sediment. The objective of this study was to investigate...
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NITRATE AND NITROUS OXIDE CONCENTRATIONS IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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We are measuring dissolved nitrate and nitrous oxide concentrations and related parameters in 17 headwater streams in the South Fork Broad River, Georgia watershed on a monthly bas...
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NITRATE REMOVAL EFFECTIVENESS OF A RIPARIAN BUFFER ALONG A SMALL AGRICULTURAL STREAM IN WESTERN OREGON |
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We established two study sites with similar soils and hydrology but contrasting riparian vegetation along Lake Creek, an intermittent stream that drains perennial ryegrass fields i...
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NITROGEN AND SULFUR INPUT-OUTPUT BUDGETS IN THE EXPERIMENTAL AND REFERENCE WATERSHEDS, BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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NITROGEN CONCENTRATIONS IN LOADING SOURCES FOR THREE COASTAL LAGOONS FROM ATMOSPHERIC AND WATERSHED SOURCES, ADJACENT COASTAL MARSHES, TIDAL EXCHANGES |
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Abstract and Oral Presentation Gulf Estuarine Research Society.
Standing stocks and inputs of total dissolved nitrogen (TDN) to three coastal lagoons, hereafter referred to ...
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NITROGEN CYCLING PROCESSES AND STABLE NITROGEN ISOTOPES IN A FORESTED WATERSHED IN TAIWAN |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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NITROGEN EXPORT FROM FORESTED WATERSHEDS IN THE OREGON COAST RANGE: THE ROLE OF N2-FIXING RED ALDER |
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Variations in plant community composition across the landscape can influence nutrient retention and loss at the watershed scale. A striking example of plant species influence is t...
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NITROGEN TO PHOSPHORUS RATIOS IN ANTHROPOGENIC INPUTS AND WATERSHED DISCHARGES TO CHESAPEAKE BAY |
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abstract for presentation...
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NITROUS OXIDE CONCENTRATIONS IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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We are measuring the dissolved nitrous oxide concentration in 17 headwater streams in the South Fork Broad River, Georgia watershed on a monthly basis. The selected small streams d...
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NON-POINT SOURCE--STREAM NUTRIENT LEVEL RELATIONSHIPS: A NATIONWIDE STUDY. SUPPLEMENT 1: NUTRIENT MAP RELIABILITY |
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The National Eutrophication Survey (NES) national maps of non-point source nitrogen and phosphorus concentrations in streams were evaluated for applicability and reliability. Inter...
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NON-POINT WATER QUALITY MODELING IN WILDLAND MANAGEMENT: A STATE-OF-THE-ART ASSESSMENT. VOLUME II. APPENDIXES |
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Contained in this volume are the model evaluation forms and the watershed inventory forms compiled as the basis for the conclusions reached in the state-of-the-art assessment prese...
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NON-SPATIAL CALIBRATIONS OF A GENERAL UNIT MODEL FOR ECOSYSTEM SIMULATIONS. (R825792) |
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General Unit Models simulate system interactions aggregated within one spatial unit of resolution. For unit models to be applicable to spatial computer simulations, they must be...
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NON-SPATIAL CALIBRATIONS OF A GENERAL UNIT MODEL FOR ECOSYSTEM SIMULATIONS. (R827169) |
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General Unit Models simulate system interactions aggregated within one spatial unit of resolution. For unit models to be applicable to spatial computer simulations, they must be...
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NONPOINT SEDIMENT PRODUCTION IN THE COLUSA BASIN DRAINAGE AREA, CALIFORNIA |
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This investigation was carried out in two phases from October 1977 to March 1982. The details on field, laboratory, and computer simulation have been reported in four comprehensive...
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NONPOINT SOURCE MODEL CALIBRATION IN HONEY CREEK WATERSHED |
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The U.S. EPA Non-Point Source Model has been applied and calibrated to a fairly large (187 sq. mi.) agricultural watershed in the Lake Erie Drainage basin of north central Ohio. Hy...
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NORTHWEST OREGON PILOT STUDY AREA (USA): A WATERSHED ASSESSMENT OF LANDSCAPE CHANGE AND IMPACTS TO AQUATIC RESOURCES |
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Studies of future management and policy options based on different assumptions provide a mechanism to examine possible outcomes and especially their likely benefits and consequence...
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NORTHWEST ORGEON PILOT STUDY AREA (USA): THE USE OF LANDSCAPE SCIENCE FOR ENVIRONMENTAL ASSESSMENT PILOT STUDY |
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The Northwest Oregon Pilot Study Area encompasses approximately 59,167 km2 and varies in elevation from sea level to 3,200 m. Annual precipitation varies with elevation and meridia...
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NRMRL'S ECOSYSTEM AND WATER QUALITY RESEARCH PROGRAMS |
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Integrated Watershed Management: Development and characterization performance of individual restoration and protection approaches such as point and non-point source controls and ...
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NUMERICAL MODELS FOR PREDICTING WATERSHED ACIDIFICATION |
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Three numerical models of watershed acidification, including the MAGIC II, ETD, and ILWAS models, are reviewed, and a comparative study is made of the specific process formulations...
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NUTRIENT AND HABITAT INDICATORS FOR CRITERIA DEVELOPMENT IN GREAT LAKES COASTAL WETLANDS |
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EPA's Mid-Continent Ecology Division is testing indicators and establishing stressor - response relationships to support development of nutrient and habitat criteria for Great Lake...
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NUTRIENT CHEMISTRY OF A LARGE DEEP LAKE IN SUBARCTIC ALASKA |
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The primary objective of this project was to assess the state of the water quality of Harding Lake, and to attempt to predict the effects of future development within its watershed...
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NUTRIENT CONCENTRATIONS IN FLOWING WATERS OF THE SOUTH FORK BROAD RIVER, GEORGIA WATERSHED |
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We monitored concentrations of nutrients, dissolved organic matter (DOM) and other parameters in 17 headwater streams, at three sites on the main stem, and in three major tributari...
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NUTRIENT CONCENTRATIONS IN FLOWING WATERS OF THE SOUTH FORK BROAD RIVER, GEORGIA WATERSHED |
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We monitored concentrations of nutrients, dissolved organic matter (DOM) and other parameters in 17 headwater streams, at three sites on the main stem, and in three major tributari...
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NUTRIENT CONCENTRATIONS IN FLOWING WATERS OF THE SOUTH FORK BROAD RIVER, GEORGIA WATERSHED |
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The South Fork Broad River (SFBR) drains about 635 km2 of the Georgia Piedmont. The SFBR watershed is primarily rural and undeveloped although the human population increased by ab...
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NUTRIENT SOUIRCES, TRANSPORT, AND FATE IN COUPLED WATERSHED-ESTUARINE SYSTEMS OF COASTAL ALABAMA |
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The processes regulating sources, transport, and fate of nutrients were studied in 3 coupled watershed-estuarine systems that varied mainly by differences in the dominant land use-...
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NUTRIENT UPTAKE AND COMMUNITY METABOLISM IN STREAMS DRAINING HARVESTED AND OLD GROWTH WATERSHEDS: A PRELIMINARY ASSESSMENT |
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The effect of timber harvesting on streams is assessed using two measures of ecosystem function: nutrient ad community metabolism. This research is being conducted in streams of ...
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NUTRIENT UPTAKE LENGTH, CHANNEL STRUCTURE, AND TRANSIENT STORAGE IN STREAMS DRAINING HARVESTED AND OLD GROWTH WATERSHEDS |
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Channel structure and transient storage were correlated with nutrient uptake length in streams draining old-growth and harvested watersheds in the Cascade Mountains of Oregon, and ...
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OCCURRENCE OF 'GIARDIA' IN CONNECTICUT WATER SUPPLIES AND WATERSHED ANIMALS |
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The main objective of this research was to study the occurrence of Giardia in selected water supplies and watershed animals in Connecticut. Water samples were collected monthly usi...
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ON THE USE OF NEXRAD STAGE IV DATA IN THE MULTIMEDIA MODELING OF POLLUTANT TRANSPORT |
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The Environmental Protection Agency (EPA) is designing the Multimedia Integrated Modeling System (MIMS) to model the cycling of pollutants and nutrients between the atmosphere an...
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ON-LINE TOXICITY MONITORS AND WATERSHED EARLY WARNING SYSTEMS |
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A Water Quality Early Warning System using On-line Toxicity Monitors (OTMs) has been deployed in the East Fork of the Little Miami River, Clermont County, OH. Living organisms have...
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ONSITE WASTEWATER SYSTEMS: HOW DID WE GET HERE? |
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This paper chronicles the history of onsite wastewater treatment over more than a Century in the US. The major research programs which came into existence since World War II have e...
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ONSITE WASTEWATER TREATMENT AND DISPOSAL SYSTEMS (1980 EDITION) AND ONSITE WASTEWATER TREATMENT SYSTEMS MANUAL (2002 EDITION) |
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The U.S. Environmental Protection Agency (USEPA) first issued detailed guidance on the design, construction, and operation of onsite wastewater treatment systems (OWTSs) in 1980. D...
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OPTIMIZING BMP PLACEMENT AT WATERSHED-SCALE USING SUSTAIN |
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Watershed and stormwater managers need modeling tools to evaluate alternative plans for environmental quality restoration and protection needs in urban and developing areas. A wate...
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ORD RESEARCH AND TECHNICAL SUPPORT AT EPA'S R.S. KERR ENVIRONMENTAL RESEARCH LABORATORY; ADA, OK |
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EPA's Robert S. Kerr Environmental Research Laboratory is one of ten Office of Research and Development research laboratories. The R.S. Kerr Environmental Research Laboratory cond...
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ORGANIC WASTE CONTAMINATION INDICATORS IN SMALL GEORGIA PIEDMONT STREAMS |
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We monitored concentrations of dissolved organic carbon(DOC) and dissolved oxygen (DO), and other parameters in 17 small streams of the South Fork Broad River watershed on a monthl...
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ORGANIC WASTE CONTAMINATION INDICATORS IN SMALL GEORGIA PIEDMONT STREAMS |
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We monitored concentrations of nitrous oxide, methane, carbon dioxide, nutrients and other parameters (T, conductivity, dissolved oxygen, alkalinity, pH, DOC, DON, flow rate) in 17...
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OVERVIEW OF EPA'S WET-WEATHER FLOW RESEARCH PROGRAM |
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This paper presents an overview of EPA's wet-weather flow (F) research program, which was expanded in October 1995 with the establishment of the Urban Watershed Management Branch a...
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OVERVIEW OF EPA'S WET-WEATHER FLOW RESEARCH PROGRAM |
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Surface waters receive three types of urban wet-weather flow discharges: combined-sewer overflow (CSO), stormwater, and sanitary-sewer overflow (SSO); all are principally untreated...
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OVERVIEW OF SESSION GOALS WITH EXAMPLES OF THE EVOLUTION OF MULTI-MEDIA MODELING FOR INFORMING REGULATORY DECISIONS AT THE U.S. ENVIRONMENTAL PROTECTION AGENCY |
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The presence of high concentrations of mercury in fish tissue worldwide has resulted in increased concern of the exposure risks of fish-eating populations. To develop effective re...
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OVERVIEW OF SOURCE WATER PROTECTION (SWP) AND WET-WEATHER FLOW (WWF) ENVIRONMENTAL TECHNOLOGY VERIFICATION (ETV) PILOT PROGRAMS |
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The USEPA Environmental Technology Verification (ETV) Program objectives, goals and benefits were described in detail in the presentation for the ETV Package Drinking Water Treatme...
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OVERVIEW OF TOTAL MAXIMUM DAILY LOAD (TMDL) PROBLEM AND SUPPORTING MODEL DEVELOPMENT |
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Approximately 18,900 impaired water bodies are on the 303(b) state lists required by the Clean Water Act. Of the 300 types of impairments on the 1996 and 1998 lists, 24% involve se...
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OVERVIEW OF USEPA MICROBIOLOGICAL RESEARCH IN DRINKING WATER |
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The Microbial Contaminants Control Branch (MCCB) conducts research on microbiological problems related to drinking water treatment, distribution and storage, and has recently becom...
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OVERVIEW OF WATERSHED FEATURES AND DYNAMICS ASSOCIATED WITH DRINKING AND RECREATIONAL WATER PROTECTION |
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This presentation will take a holistic view of the watershed; considering microbiological water quality needs and how they are influenced by activities in the watershed. It will lo...
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OVERVIEW OF WET-WEATHER RESEARCH PROGRAM |
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This paper presents an overview of EPA,s wet-weather flow (WWF) research program, which was expanded in October 1995 with the establishment of the Urban Watershed Management Bran...
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OXYGEN-CONSUMING ORGANICS IN NONPOINT SOURCE RUNOFF: A LITERATURE REVIEW |
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Much research has been carried out on the pollutional strength of nonpoint source runoff and the potential effect of the runoff upon freshwater systems of the United States. This r...
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Online Toxicity Monitors (OTM) for Distribution System Water Quality Monitoring |
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Drinking water distribution systems in the U.S. are vulnerable to episodic contamination events (both unintentional and intentional). The U.S. Environmental Protection Agency (EPA)...
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Optimization Tool For Allocation Of Watershed Management Practices For Sediment And Nutrient Control |
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Implementation of conservation programs are perceived as being crucial for restoring and protecting waters and watersheds from nonpoint source pollution. Success of these programs ...
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Optimizing BMP Placement at Watershed-Scale Using SUSTAIN. A presentation |
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SUSTAIN is intended to support local and county government engineers/planners, federal/state regulatory reviewers, private consulting engineers, concerned citizens, stakeh...
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PACIFIC NORTHWEST SIDE-BY-SIDE PROTOCOL COMPARISON TEST |
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Eleven state, tribal, and federal agencies participated during summer 2005 in a side-by-side comparison of protocols used to measure common in-stream physical attributes to help de...
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PAIRED WATERSHED STUDY OF LAND-USE AND CLIMATE CHANGE IMPACT ON SMALL STREAMS |
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EPA installed flow monitoring stations on three tributaries to the Shepherd's Creek just outside of Cincinnati, Ohio. The western and central tributaries are on the urban fringe w...
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PALEOCOLOGICAL INVESTIGATION OF RECENT LAKE ACIDIFICATION IN THE ADIRONDACK MOUNTAINS, NY |
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Paleoecological analysis of the sediment record of 12 Adirondack lakes reveals that the 8 clearwater lakes with current pH<5.5 and alkalinity <10 ueq 1-1 have acidified recently. h...
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PARAMETRIC DISTANCE WEIGHTING OF LANDSCAPE INFLUENCE ON STREAMS |
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We present a parametric model for estimating the areas within watersheds whose land use best predicts indicators of stream ecological condition. We regress a stream response variab...
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PARTIAL LEAST SQUARE ANALYSES FOR ASSOCIATION OF LANDSCAPE METRICS WITH WATER BIOLOGICAL AND CHEMICAL PROPERTIES IN THE SAVANNAH RIVER BASIN |
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Surface water quality is related to conditions in the surrounding geophysical environment, including soils, landcover, and anthropogenic activities. A number of statistical methods...
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PARTIAL LEAST SQUARES (PLS) REGRESSION FOR SMALL SAMPLE WITH COLLINEAR PREDICTORS IN LANDSCAPE ECOLOGY |
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The model results may help landscape ecologists produce indicators of surface water condition, such that unique combinations of these indicators can be used to infer the potential ...
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PARTICIPATORY STORM WATER MANAGEMENT AND SUSTAINABILITY – WHAT ARE THE CONNECTIONS? |
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Urban stormwater is typically conveyed to centralized infrastructure, and there is great potential for reducing stormwater runoff quantity through decentralization. For areas which...
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PAST, PRESENT AND FUTURE AIR QUALITY MODELING AND ITS APPLICATIONS IN THE UNITED STATES |
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Since the inception of the Clean Air Act (CAA) in 1969, atmospheric models have been used to assess source-receptor relationships for sulfur dioxide and total suspended particula...
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PATUXENT LANDSCAPE MODEL: INTEGRATED ECOLOGICAL ECONOMIC MODELING OF A WATERSHED (R824766) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PATUXENT LANDSCAPE MODEL: INTEGRATED ECOLOGICAL ECONOMIC MODELING OF A WATERSHED. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PATUXENT LANDSCAPE MODEL: INTEGRATED ECOLOGICAL ECONOMIC MODELING OF A WATERSHED. (R827169) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PER-TAXON MODELS FOR ASSEMBLAGE-BASED BIOASSESSMENTS: MODELING THE WHOLE AS THE SUM OF ITS PARTS |
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Modern statistical software makes it practical to build and apply a large set of empirical presence/absence models, one for every taxon in an assemblage. We applied this approach,...
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PERFORMANCE VERIFICATION TESTING OF SOURCE WATER PROTECTION TECHNOLOGIES UNDER EPA'S ENVIRONMENTAL TECHNOLOGY VERIFICATION PROGRAM |
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This paper presents a brief overview of EPA's ETV program established in 1995 to overcome the numerous impediments to commercialization experienced by developers of innovative envi...
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PESTICIDE LEACHING ANALYTICAL MODEL AND GIS-BASED APPLICATION IN AGRICULTURAL WATERSHEDS |
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Groundwater contamination by pesticides and other organic pollutants has been detected across agricultural areas and is on the increase. Because groundwater monitoring is too costl...
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PESTICIDE RUNOFF LOSSES FROM SMALL WATERSHEDS IN GREAT LAKES BASIN |
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An assessment is made of sources of variation in pesticide analyses for soil cores taken during the period May 1973 through September 1974 from two watersheds. A number of relation...
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PLANNING ALTERNATIVE FUTURE LANDSCAPES IN OREGON: EVALUATING EFFECTS ON WATER QUALITY AND BIODIVERSITY |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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PLANNING CHANGE: CASE STUDIES ILLUSTRATING THE BENEFITS OF GIS AND LAND-USE DATA IN ENVIRONMENTAL PLANNING |
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A well-established protocol for planning environmentally sustainable development has yet to be agreed upon. Experiences from two highly-studied basins in the United States illustr...
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POLLUTION PREVENTION MULTI-YEAR PLAN |
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Over the last decade, the Agency has increasingly focused on pollution prevention when addressing high-risk human health and environmental problems. A preventive approach requires:...
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POPULATION MODELS FOR STREAM FISH RESPONSE TO HABITAT AND HYDROLOGIC ALTERATION: THE CVI WATERSHED TOOL |
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The Canaan Valley Institute (CVI) is dedicated to addressing the environmental problems in the Mid-Atlantic Highlands (MAH). Their goal is to develop and implement solutions to res...
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POTENTIAL AQUATIC COMMUNITY IMPROVEMENT THROUGH A MULTIDISCIPLINARY STORMWATER MANAGEMENT EXPERIMENT |
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Small-scale urban stream restoration efforts (e.g., riparian planting and in-stream habitat structures) often fail to improve ecological structure and function due the continuous h...
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POTENTIAL IMPACTS OF ORGANIC WASTES ON SMALL STREAM WATER QUALITY |
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We monitored concentrations of dissolved organic carbon (DOC), dissolved oxygen (DO) and other parameters in 17 small streams of the South Fork Broad River (SFBR) watershed on a mo...
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POTENTIAL INFLUENCE OF STOCHASTIC STREAMFLOW CHARACTERISTICS ON JUVENILE COHO SALMON |
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abstract/abstract...
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POWER PLANT INFLUENCES ON BULK PRECIPITATION, THROUGHFALL, AND STEMFLOW NUTRIENT INPUTS |
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Inputs of SO4(-2), total N, PO4(-3), K, Ca, and Mg via bulk precipitation, throughfall and stemflow have been investigated over a 3-year period at two forest study sites on the Cum...
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PRE-RESTORATION GEOMORPHIC AND SEDIMENT CONDITIONS OF MINEBANK RUN, BALTIMORE COUNTY, MARYLAND |
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Urban streams frequently undergo severe incision and erosion due to flashy streamflows caused by impervious surfaces in the watershed. Such streamflows can lead to unstable sedime...
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PRE-RESTORATION GEOMORPHIC AND SEDIMENT CONDITIONS OF MINEBANK RUN, BALTIMORE COUNTY, MARYLAND |
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Urban streams frequently undergo severe incision and erosion due to flashy streamflows caused by impervious surfaces in the watershed. Such streamflows can lead to unstable sedime...
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PREDICTING AND FORECASTING SURFACE WATER ACIDIFICATION: A PLAN FOR ASSESSING DATA AGGREGATION EFFECTS |
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A major goal of the Direct/Delayed Response Project (DDRP), a project within the U.S. Environmental Protection Agency's (EPA) Aquatic Effects Research Program (AERP) is to project ...
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PREDICTING CHANGES USING MULTI-DATE SATELLITE IMAGERY: SAN PEDRO RIVER CASE STUDY |
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Vegetation change in the American West has been a subject of concern throughout the twentieth century. Although many of the changes have been recorded qualitatively through t...
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PREDICTING ENVIRONMENTAL CONCENTRATIONS OF AIRBORNE POLLUTANTS IN TERRESTRIAL RECEPTORS: THE CASE OF MERCURY |
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The question of mercury in the environment has rapidly become one of the high-profile environmental issues in several countries and internationally. There are environmental and hum...
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PREDICTING ESTUARINE SEDIMENT METAL CONCENTRATIONS AND INFERRED ECOLOGICAL CONDITIONS: AN INFORMATION THEORETIC APPROACH |
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Empirically derived values associating sediment metal concentrations with degraded ecological conditions provide important information to assess estuarine condition. However, reso...
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PREDICTING NUTRIENT AND SEDIMENT LOADINGS TO STREAMS FROM LANDSCAPE METRICS: A MULTIPLE WATERSHED STUDY FROM THE UNITED STATES MID-ATLANTIC REGION |
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There has been an increasing interest in evaluating the relative condition or health of water resources at regional and national scales. Of particular interest is an ability to id...
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PREDICTING PHYSICAL AND CHEMICAL WATER PROPERTIES FROM RELATIONSHIPS WITH WATERSHED SOIL CHARACTERISTICS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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PREDICTING PRESENCE OF NUTRIENTS AND PESTICIDES IN BASE FLOW CONDITIONS OF FIRST ORDER STREAMS IN THE MID-ATLANTIC COASTAL PLAIN |
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Excess nutrients and pesticides in the environment can cause a variety of ecological and human-health effects. When nutrients are unused by plants, or pesticides remain after use o...
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PREDICTING THE ACUTE TOXICITY OF COPPER IN FRESHWATER SEDIMENTS: EVALUATION OF THE ROLE OF ACID-VOLATILE SULFIDE |
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Acid-volatile sulfide (AVS) has been proposed as an important partitioning phase determining the bioavailability of cationic metals in sediments. he objective of this research was ...
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PREDICTING THE FUTURE LONG-TERM EFFECTS OF ACIDIC DEPOSITION ON SURFACE WATER CHEMISTRY: THE DIRECT/DELAYED RESPONSE PROJECT |
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In 1984 the U.S. Environmental Protection Agency (EPA) (as part of the National Acid Precipitation Assessment Program [NAPAP]) initiated a project to estimate potential future effe...
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PREDICTING VIRUS LOADING TO STREAMS FROM GROUNDWATER: NONPOINT SOURCE APPLICATIONS FOR TMDL EVALUATIONS |
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Density of septic systems in watersheds has been identified as a contributor to pathogen loading in streams. At present, little work has been done to provide simple models to assis...
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PREDICTION OF CLIMATE CHANGE EFFECTS ON FISH COMMUNITIES IN THE MACKINAW RIVER WATERSHED, ILLINOIS. (R827451) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PREDICTION OF FUNDAMENTAL ASSEMBLAGES OF MID-ATLANTIC HIGHLAND STREAM FISHES |
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A statistical software tool, the Stream Fish Assemblage Predictor (SFAP), based on stream sampling data collected by the EPA in the mid-Atlantic Highlands, was developed to predict...
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PREDICTIONS IN AN INVADED WORLD - PART II: USING NICHE MODELS TO PREDICT DISTRIBUTIONS OF MARINE/ESTUARINE SPECIES AT THE ESTUARY SCALE |
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To better understand the potential geographical distributions of nonindigenous species (NIS), we are evaluating the ability of niche models to predict the presence of existing nati...
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PRESENTED AT JOPLIN, MO - WATER QUALITY VULNERABILITY IN THE OZARKS: AN ONGOING ASSESSMENT OF THE UPPER WHITE RIVER WATERSHED |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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PRIORITIZING WETLAND RESTORATION FOR SEDIMENT YIELD REDUCTION: A CONCEPTUAL MODEL |
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In a climate of limited resources, it is often necessary to geographically prioritize restoration efforts. The synoptic approach is an ecologically-based tool for geographic prior...
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PROBABILISTIC ASSESSMENT OF GROUNDWATER VULNERABILITY TO NONPOINT SOURCE POLLUTION IN AGRICULTURAL WATERSHEDS |
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This paper presents a probabilistic framework for the assessment of groundwater pollution potential by pesticides in two adjacent agricultural watersheds in the Mid-Altantic Coasta...
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PROBABILITY SURVEY DESIGN ALTERNATIVES FOR WATERSHED-BASED STREAM AND RIVER MONITORING PROGRAMS |
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National, state, and tribal nation monitoring programs are designed to address multiple objectives. One objective comes from Clean Water Act Section 305(b) and is to provide stat...
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PROCEDURES FOR PREDICTIVE ANALYSIS OF SELECTED HYDROLOGIC IMPACTS OF SURFACE MINING |
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This report presents a methodology for the prediction of selected hydrologic impacts of surface coal mining. Procedures for estimation of the chemical and hydrologic parameters req...
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PROCEEDINGS FROM A NATO/CCMS PILOT STUDY MEETING AT LECCE, ITALY: LINKAGES AMONG LANDSCAPE ASSESSMENT, QUALITY OF LIFE AND ENVIRONMENTAL SECURITY |
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From 5-9 September 2004 the international working group of the NATO/CCMS Pilot Study on the "Use of Landscape Sciences for Environmental Assessment" met in Lecce, Italy. The result...
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PROCEEDINGS OF A WORKSHOP ON SUSPENDED SEDIMENTS AND SOLIDS |
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The Workshop on Suspended Sediments and Solids was held on July 11-12, 2002 in Cincinnati, Ohio. The workshop was conducted by the U.S. Environmental Protection Agency's (USEPA) Na...
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PROCESSES CONTROLLING THE EPISODIC STREAMWATER TRANSPORT OF ATRAZINE AND OTHER AGROCHEMICALS IN AN AGRICULTURAL WATERSHED. (R824772) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PRODUCTION ECOLOGY OF THE NON-INDIGENOUS SEAGRASS, DWARF EELGRASS (ZOSTERA JAPONICA ASCHER. & GRAEB.), IN A PACIFIC NORTHWEST ESTUARY, USA |
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The non-indigenous seagrass Zostera japonica Ascher. & Graeb. (dwarf eelgrass) was first identified in central Oregon (USA) estuaries about 30 years ago. The autecology of this sp...
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PRODUCTIVITY AND SPECIES RICHNESS IN SMALL HIGHLAND STREAMS: THE INTERACTION OF HABITAT AND LAND USE HISTORY |
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Small, upland, coldwater streams are an important resource for watershed management. In the Mid-Atlantic region, these streams are affected by acid deposition, mountaintop removal...
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PROJECTING THE BIOLOGICAL CONDITION OF STREAMS UNDER ALTERNATIVE SCENARIOS OF HUMAN LAND USE |
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We present empirical models for estimating the status of fish and aquatic invertebrate communities in all second to fourth-order streams (1:100,000 scale; total stream length = 647...
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PROSPECTS FOR ENHANCED GROUNDWATER RECHARGE VIA INFILTRATION OF URBAN STORMWATER RUNOFF: A CASE STUDY |
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The rain garden is an urban storm water best management practice that is used to infiltrate runoff close to its source, thereby disconnecting impervious area while providing an ave...
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PROTECTING HUMAN HEALTH AND THE ENVIRONMENT ON SIOUX TRIBAL LANDS: A PARTNERSHIP OF EPA AND TRIBAL EPD |
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Through environmental sampling performed by EPA and Cheyenne River Sioux Tribe Environmental Protection Division personnel, mercury contamination in managed pond systems in South D...
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PROVENANCE OF GEOGENIC ARSENIC IN THE GOOSE RIVER BASIN, MAINE, USA |
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Occurrences of arsenic (As) are sporadic in drinking water from many wells in mid-coastal Maine (ME). This is particularly the case where water supplies are pumped from fractured i...
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PUTTING SCIENCE INTO ACTION: FISH-HABITAT RELATIONSHIPS IN PACIFIC NORTHWEST STREAMS |
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The Calapooia River, a major tributary to the Willamette River in Oregon, provides an outstanding opportunity to study dynamics of dissolved nitrogen (DN) in a multiple landuse wat...
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Permeable Pavement Research at NRMRL’s Urban Watershed Research Facility |
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The results of a bench-scale study of a porous pavement parking lot. Flow rates and total suspended solids (TSS) removal are discussed for systems with a geotextile filter fabric l...
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Permeable Pavement Research at NRMRL’s Urban Watershed Research Facility (Poster 2) |
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Assess pollutant removal efficiency of porous pavement systems with regard to parking lot runoff.
Bench-scale study will examine:
Discharge volume
Flow rate ...
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Pervious Pavement System Evaluation- Abstract 1 |
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Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The ...
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Pervious Pavement System Evaluation-Poster |
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Pervious pavement is a low impact development stormwater control. The Environmental Protection Agency's Urban Watershed Management Branch is evaluating interlocking concrete paving...
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Physical indicators of hydrologic permanence in forested headwater streams |
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Recent court cases have brought headwater streams and their hydrologic permanence into the forefront for regulatory agencies, so rapid field-based indicators of hydrologic permanen...
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Presence of organic matter and microbial activity in Minebank Run, a restored stream in the Chesapeake Bay watershed |
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Abstract: Increasing nitrate levels in streams and ground water are harmful to both the environment and humans. Denitrification, a natural process performed by microbes, removes ni...
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QUALITY ASSURANCE AND QUALITY CONTROL IN THE DEVELOPMENT AND APPLICATION OF THE AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT (AGWA) TOOL |
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Planning and assessment in land and water resource management are evolving from simple, local-scale problems toward complex, spatially explicit regional ones. Such problems have to...
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QUALITY OF GROUND WATER AND MARINA LAKE WATER IN TEXOMA WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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QUANTIFICATION OF CHANGES IN LAKEWATER CHEMISTRY IN RESPONSE TO ACIDIC DEPOSITION |
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Lakewater acidification in New York's Adirondack Mountains was quantified based on paleolimnological reconstructions of pre-1850 chemistry for 49 lakes. aleolimnology provides a mo...
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QUANTIFYING AN UNCERTAIN FUTURE: HYDROLOGIC MODEL PERFORMANCE FOR A SERIES OF REALIZED "FUTURE" CONDITIONS |
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GIS-based hydrologic modeling offers a convenient means of assessing the impacts associated with land-cover/use change for environmental planning efforts. Future scenarios can be d...
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QUANTIFYING SEASONAL SHIFTS IN NITROGEN SOURCES TO OREGON ESTUARIES. PART I: EMPIRICAL 15N MACROALGAE DATA |
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“Green Tides” are typically considered to be a symptom of eutrophication associated with anthropogenic nutrient loading. In many estuaries along the Pacific Northwest (PNW), the s...
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QUANTIFYING SPATIAL POSITION OF WETLANDS FOR STREAM HABITAT QUALITY PREDICTION |
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A watershed's capacity to store and filter water, and the resulting effects on the hydrologic regine, is a key forcing function for insteam processes and community structure. Howe...
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QUANTIFYING SPATIAL POSITION OF WETLANDS FOR STREAM HABITAT QUALITY PRODUCTION |
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A watershed's capacity to store and filter water, and the resulting effects on the hydrologic regime, is a key forcing function for instream processes and community structure....
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QUANTIFYING STRUCTURAL PHYSICAL HABITAT ATTRIBUTES USING LIDAR AND HYPERSPECTRAL IMAGERY |
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Structural physical habitat attributes include indices of stream size, channel gradient, substrate size, habitat complexity and cover, riparian vegetation cover and structure, anth...
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Quantifying The Water Quality Services Of Wetlands |
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Wetlands are well recognized for their potential for providing a wide range of important ecological services including their ability to provide water quality protection. Watershed...
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RADICALLY CONTESTED ASSERTIONS IN ECOSYSTEM MANAGEMENT |
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Ecosystem management is a magnet for controversy, in part because some of its formulations rest on questionable assertions that are radically contested. These assertions are impor...
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RANDOMIZED INTERVENTION ANALYSIS OF THE BEHAVIOR OF BEAR BROOK WATERSHED, MAINE, USA |
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The Aquatic Effects Research Program (AERP) within the National Acid Precipitation Assessment Program (NAPAP), the U.S. federal plan for effects research for acidic deposition, fun...
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RANGELAND WATERSHED WATER BUDGET AND GRAZING CATTLE WASTE NUTRIENT CYCLING |
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This research project was designed to determine baseline data concerning the source, movement, concentration and factors affecting nonpoint pollutants in runoff from a representati...
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RAPID POST-FIRE HYDROLOGIC WATERSHED ASSESSMENT USING THE AGWA GIS-BASED HYDROLOGIC MODELING TOOL |
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Rapid post-fire watershed assessment to identify potential trouble spots for erosion and flooding can potentially aid land managers and Burned Area Emergency Rehabilitation (BAER) ...
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REACTIONS THAT MODIFY CHEMISTRY IN LAKES OF THE NATIONAL SURFACE WATER SURVEY |
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A simple mass balance equation was used to determine the important reactions that occur in selected lake watersheds of the Adirondack Park, the Southern Blue Ridge Province of the ...
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REAL-TIME CONTROL OF COMBINED SEWER NETWORKS |
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Real-time control (RTC) is a custom-designed management program for a specific urban sewerage system during a wet-weather event. The function of RTC is to assure efficient operatio...
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RECENT TRENDS IN THE ACID-BASE STATUS OF SURFACE WATERS IN MAINE, USA |
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Data from the EPA Long Term Monitoring Program lakes at the Tunk Mtn Watershed, Maine indicate that decreases of < 1 ueq L-1 yr-1 in SO4 and increases of < 2 ueq L-1 yr-1 in ANC oc...
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RECONNAISSANCE FOR ARSENIC, ESTRADIOL, ANTIBIOTICS, AND MICROBIAL RESISTANCE IN POULTRY-DOMINATED CHESAPEAKE BAY WATERSHEDS |
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There are concerns about the effects from the high density of poultry feeding operations and the extensive use of feed amendments on water quality in the Shenandoah Valley in Virgi...
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RECOVERY OF SURFACE WATERS IN THE NORTHEASTERN U.S. FROM DECREASES IN ATMOSPHERIC DEPOSITION OF SULFUR |
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A simple mass flux model was developed to simulate the response of SO concentrations in surface waters to past and anticipated future changes in atmospheric deposition of SO . Va...
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RECOVERY OF THE HIGHLY ACIDIFIED CLEARWATER LAKE WATERSHED, ONTARIO, CANADA, SIMULATED WITH THE ILWAS MODEL |
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The integrated Lake Watershed Acidification Study (ILWAS) model was used to simulate the recovery of the highly acidified Clearwater Lake, Ontario. Recovery started in the mid-1970...
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RECURSIVE PARAMETER ESTIMATION OF HYDROLOGIC MODELS |
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Proposed is a nonlinear filtering approach to recursive parameter estimation of conceptual watershed response models in state-space form. he conceptual model state is augmented by ...
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RED SHINER INVASION OF SOUTHEASTERN STREAMS: DYNAMICS AND ECOLOGICAL CONSEQUENCES |
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Red shiners, a minnow species native to streams of the central U.S., are spreading to other regions due to their widespread use as a bait-fish. Their expansion into new habitats c...
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REGION V PRESENTATION: WATERSHED CLASSIFICATION AS A TOOL TO PARTITION VARIANCE IN NUTRIENT-BIOLOGICAL RESPONSE RELATIONSHIPS |
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This database will provide the information necessary both for developing a watershed classification system and for deriving diagnostic community-based indicators...
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REGION, LANDSCAPE, AND SCALE EFFECTS ON LAKE SUPERIOR TRIBUTARY WATER QUALITY |
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In this study we apply an approach to third-order streams that we used previously to predict sensitivity of second-order streams to nonpoint source pollution based on the nonlinear...
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REGIONAL APPLICATION OF AN INDEX OF BIOTIC INTEGRITY BASED ON STREAM FISH COMMUNITIES |
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The recently proposed index of biotic integrity (IBI) was evaluated for several watersheds throughout the midwestern United States. Five of the community metrics comprising the IBI...
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REGIONAL ASSESSMENT OF LAND USE IMPACTS ON STREAM CHANNEL HABITAT IN THE MIDDLE COLUMBIA RIVER BASIN |
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Many human land uses and land cover modifications (e.g., logging, grazing, roads) tend to increase erosion, leading to an increase in fine sediment supplied to streams and potentia...
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REGIONAL CALIBRATION OF A WATERSHED MODEL. (R824992) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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REGIONAL CHARACTERISTICS OF LAND USE IN NORTHEAST AND SOUTHERN BLUE RIDGE PROVINCE: ASSOCIATIONS WITH ACID RAIN EFFECTS ON SURFACE-WATER CHEMISTRY |
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The Direct/Delayed Response Project (DDRP) is one of several being conducted by the United states Environmental Protection Agency to assess risk to surface waters from acidic depos...
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REGIONAL DATABASE FOR WATERSHED CLASSIFICATION, NUTRIENT-RESPONSE RELATIONSHIPS, AND DIAGNOSTIC INDICATORS IN SUPPORT OF NUTRIENT CRITERIA DEVELOPMENT |
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USEPA has published recommended nutrient criteria for streams as a starting point for protecting surface water resources and is encouraging states/tribes to refine the proposed nut...
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REGIONAL MODELING OF THE ATMOSPHERIC TRANSPORT AND DEPOSITION OF ATRAZINE |
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A version of the Community Multiscale Air Quality (CMAQ) model has been developed by the U.S. EPA that is capable of addressing the atmospheric fate, transport and deposition of ...
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REGIONAL PRIORITIZATIONS OF BIODIVERSITY AND SEDIMENT RETENTION FUNCTIONS: FINDINGS AND MANAGEMENT RELEVANCE |
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The synoptic approach is a landscape-level assessment tool for geographic prioritization of wetland protection and restoration efforts. Prioritization becomes necessary when effor...
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REGIONAL RELATIONSHIPS BETWEEN GEOMORPHIC/HYDROLOGIC PARAMETERS AND SURFACE WATER CHEMISTRY RELATIVE TO ACIDIC DEPOSITION |
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We determined geomorphic and hydrologic parameters for 144 forested, lake watersheds in the Northeast (NE) of the United States based primarily on measurements from topographic map...
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REGIONAL SOIL WATER RETENTION IN THE CONTIGUOUS US: SOURCES OF VARIABILITY AND VOLCANIC SOIL EFFECTS |
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Water retention of mineral soil is often well predicted using algorithms (pedotransfer functions) with basic soil properties but the spatial variability of these properties has not...
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REGIONAL VULNERABILITY ASSESSMENT (REVA) IMPROVING ENVIRONMENTAL DECISION MAKING THROUGH CLIENT PARTNERSHIPS |
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The Regional Vulnerability Assessment (ReV A) Program is an applied research program t,1at is focusing on using spatial information and model results to support environmental decis...
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REGIONAL, BASIN, AND LOCAL FACTORS INFLUENCING THE USE OF SYNOPTIC SURVEY DATA TO ASSESS ANTHROPOGENIC CHANGES IN STREAMBED STABILITY AND FINE SEDIMENT |
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To evaluate anthropogenic changes in stream bed stability or texture from synoptic stream surveys, we calculated relative bed stability RBS* as the ratio of the geometric mean bed ...
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REGIONAL, WATERSHED, AND LOCAL CORRELATES OF BLUE CRAB AND BIVALVE ABUNDANCES IN SUBESTUARIES OF CHESAPEAKE BAY. (R828684C001) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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REGIONAL, WATERSHED, AND SITE-SPECIFIC ENVIRONMENTAL INFLUENCES ON FISH ASSEMBLAGE STRUCTURE AND FUNCTION IN WESTERN LAKE SUPERIOR TRIBUTARIES |
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The relative importance of regional, watershed, and in-stream environmental factors on stream fish assemblage structure and function was investigated as part of a comparative water...
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REGIONAL-SCALE MODELING OF POTENTIAL FUTURE EFFECTS OF ACIDIC DEPOSITION ON SURFACE WATER CHEMISTRY |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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REGRESSION MODELS THAT RELATE STREAMS TO WATERSHEDS: COPING WITH NUMEROUS, COLLINEAR PEDICTORS |
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GIS efforts can produce a very large number of watershed variables (climate, land use/land cover and topography, all defined for multiple areas of influence) that could serve as ca...
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RELATING WATER QUALITY TO SOIL AND WATERSHED CHARACTERISTICS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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RELATIONS BETWEEN LAND USE AND STREAM NUTRIENT CONCENTRATIONS FOR SMALL WATERSHEDS IN THE GEORGIA PIEDMONT |
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We have been sampling nutrient concentrations in 17 headwater streams within the South Fork Broad River (SFBR) watershed on a monthly basis since November 2001. The streams were cl...
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RELATIONSHIP BETWEEN AQUATIC INVERTEBRATE COMMUNITIES AND REACH, NETWORK AND WATERSHED SCALE ATTRIBUTES IN WILLAMETTE VALLEY STREAMS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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RELATIONSHIP BETWEEN AQUATIC INVERTEBRATE COMMUNITIES AND REACH, NETWORK, AND WATERSHED SCALE ATTRIBUTES IN WILLAMETTE VALLEY STREAMS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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RELATIONSHIP OF STREAM FLOW REGIME IN THE WESTERN LAKE SUPERIOR BASIN TO WATERSHED TYPE CHARACTERISTICS |
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To test a conceptual model of nonlinear response of hydrologic regimes to watershed characteristics, we selected 48 second- and third-order study sites on the North and South Shore...
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RELATIONSHIPS BETWEEN DISSOLVED NITROGEN AND LANDUSE/LANDCOVER AT TWO SPATIAL SCALES IN THE CALAPOOIA RIVER WATERSHED, OREGON |
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The Calapooia River, a major tributary to the Willamette River in Oregon, provides an outstanding opportunity to study dynamics of dissolved nitrogen (DN) in a multiple landuse wat...
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RELATIONSHIPS BETWEEN SUMMER CONCENTRATIONS OF TOTAL NITROGEN AND CHLOROPHYLL A IN TEN COASTAL SYSTEMS IN THE EASTERN UNITED STATES |
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We have examined relationships between summer (JuneAugust) average concentrations of total nitrogen (TN) and chlorophyll a (chl a) concentrations in the near-shore Mid-Atlantic Big...
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RELATIONSHIPS BETWEEN WATERSHED STRESSORS AND SEDIMENT CONTAMINATION IN CHESAPEAKE BAY ESTUARIES |
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NO ABSTRACT PROVIDED...
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RELATIONSHIPS OF ALIEN PLANT SPECIES ABUNDANCE TO RIPARIAN VEGETATION, ENVIRONMENT, AND DISTURBANCE |
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Riparian ecosystems are often invaded by alien species. We evaluated vegetation, environment, and disturbance conditions and their interrelationships with alien species abundance a...
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RELATIONSIPS BETWEEN AQUATIC INVERTEBRATE ASSEMBLAGES AND REACH AND LANDSCAPE ATTRIBUTES ON WADEABLE, WILLAMETTE VALLEY STREAMS IN AGRICULTURAL WATERSHEDS |
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In summer 1997, we sampled reaches in 24 wadeable, Willamette Valley ecoregion streams draining agriculturally-infiuenced watersheds. Within these reaches, physical habitat, water ...
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REMOTE AND PROXIMATE SENSING IN SUPPORT OF SUSTAINABLE WATERSHED MANAGEMENT |
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Inter-generationally prudent management of watershed resources will require attention to a complex array of interdependent variables. An interdisciplinary team of investigators fro...
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REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEMS FOR DECISION ANALYSIS IN PUBLIC RESOURCE ADMINISTRATION: A CASE STUDY OF 25 YEARS OF LANDSCAPE CHANGE IN A SOUTHWESTERN WATERSHED |
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Alternative futures analysis is a scenario-based approach to regional land planning that attempts to synthesize existing scientific information in a format useful to community deci...
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REMOTE SENSING AND SPATIALLY EXPLICIT LANDSCAPE-BASED NITROGEN MODELING METHODS DEVELOPMENT IN THE NEUSE RIVER BASIN, NC |
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The objective of this research was to model and map the spatial patterns of excess nitrogen (N) sources across the landscape within the Neuse River Basin (NRB) of North
Carolin...
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REMOTE SENSING APPLICATIONS FOR SUSTAINABLE WATERSHED MANAGEMENT AND FOOD SECURITY |
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The integration of IKONOS satellite data, airborne color infrared remote sensing, visualization, and decision support tools is discussed, within the contexts of management techniqu...
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REMOTE SENSING APPLICATIONS FOR SUSTAINABLE WATERSHED MANAGEMENT AND FOOD SECURITY |
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The integration of IKONOS satellite data, airborne color infrared remote sensing, visualization, and decision support tools is discussed, within the contexts of management techniqu...
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REMOTE SENSING APPLICATIONS FOR SUSTAINABLE WATERSHED MANAGEMENT AND FOOD SECURITY: JOURNAL ARTICLE |
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NRMRL-CIN-1496A Rochon*, G., Szlag*, D., Daniel*, F.B., and Chifos**, C. Remote Sensing Applications for Sustainable Watershed Management and Food Security. Proceedings of the 21s...
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REMOTE SENSING, VISUALIZATION AND DECISION SUPPORT FOR WATERSHED MANAGEMENT AND SUSTAINABLE AGRICULTURE |
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The integration of satellite and airborne remote sensing, scientific visualization and decision support tools is discussed within the context of management techniques for minimizin...
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REPLY TO DISCUSSION BY GEOFF KITE ON "RELATIONSHIP BETWEEN ANNUAL RUNOFF AND WATERSHED AREA" FOR THE EASTERN UNITED STATES |
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The study was initiated because annual runoff is needed for several analyses being conducted by the U.S. Environmental Protection Agency (EPA). he study was concerned with the exis...
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RESEARCH AND INFORMATION NEEDS RELATED TO NONPOINT SOURCE POLLUTION AND WETLANDS IN THE WATERSHED: AN EPA PERSPECTIVE |
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Two related efforts of the U.S. Environmental Protection Agency, wetlands protection and nonpoint source (NPS) pollution control, fail to fully consider landscape factors when maki...
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RESEARCH FOR MANAGING URBAN WATERSHED MICROBIAL CONTAMINATION (PROJECT 1: MANAGING URBAN WATERSHED PATHOGEN CONTAMINATION: 2. EFFECT OF LAND USE AND SEASON ON MICROORGANISM CONCENTRATION ON URBAN STORMWATER RUNOFF; 3. MICROORGANISM DIE-OFF RATES UNDER VARIOUS CONDITIONS. |
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The Water Supply and Water Resources Division (WSWRD) developed a document entitled Managing Urban Watershed Pathogen Contamination (EPA 600/R-03/111). This document provides info...
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RESEARCH IN URBAN STORMWATER BMPS |
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The use of best management practices (BMPs) in an urban watershed can provide adequate degress of treatment at a relatively low cost. BMPs can range from being management operation...
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RESEARCH IN URBAN STORMWATER BMPS |
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The use of best management practices (BMPs) in an urban watershed can provide adequate degress of treatment at a relatively low cost. BMPs can range from being management operation...
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RESEARCH NEEDS FOR EFFECTIVE WATERSHED PLANNING |
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Watershed research has historically focused on physical and biological processes, stressor-response, and effects research, providing valuable understanding of the effects of human ...
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RESEARCH PLAN: LANDSCAPE AND WATERSHED INFLUENCES ON WILD SALMON AND FISH ASSEMBLAGES IN OREGON COASTAL STREAMS |
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This document is a Research Plan. In the Pacific Northwest (PNW), many populations of wild anadromous salmonids are in serious decline. Landscape change, water pollution, introdu...
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RESEARCH SHOWS IMPORTANCE OF RIPARIAN BUFFERS FOR AQUATIC HEALTH |
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Issue: Excess nitrogen from fertilizer, septic tanks, animal feedlots, and runoff from pavement can threaten aquatic ecosystem health. Riparian buffers -- the vegetated region adj...
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RESOURCE MANAGERS BENEFIT FROM EPA'S VIEW OF THE OZARKS LANDSCAPE |
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The words “promise, praise, and problems” are frequently used to describe recent industry and population growth in the Ozark Mountains region (see, for example, Kirkpatrick, S. No ...
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RESOURCES ALLOCATION TO OPTIMIZE MINING POLLUTION CONTROL |
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A comprehensive model for mine drainage simulation and optimization of resource allocation to control mine acid pollution in a watershed has been developed. The model is capable of...
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RESPONSE OF COASTAL RIVERINE AND MICROBIAL AND VEGETATION COMMUNITIES TO NUTRIENT LOADING GRADIENTS: MINING SURVEY DATA FOR CRITERIA DEVELOPMENT |
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A probabilistic survey of Lake Michigan coastal riverine wetlands demonstrated microbial, algal, and vegetation responses to gradients in nutrient loading and N:P ratios. Sediment ...
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RESPONSE OF SKINNER LAKE (INDIANA) TO AGRICULTURAL DRAINAGE |
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During 1976-1981, various land management practices were initiated on the agricultural watershed of Skinner Lake in Noble County, Indiana. Land treatment practices implemented on t...
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RESPONSE OF THREE PALEO-PRIMARY PRODUCTION PROXY MEASURES TO DEVELOPMENT OF AN URBAN ESTUARY |
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In this study we present a novel comparison of three proxy indicators of paleoproductivity, pigments, biogenic silica (BSi), and cysts of autotrophic dinoflagellates measured in co...
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RESTORATION EFFECTS ON N CYCLING POOLS AND PROCESSES |
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Over the past several years, there has been an acceleration of restoration efforts to mitigate the consequences (i.e., ground and surface water chemical pollutants, erosion, etc.) ...
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RESTORATION PLUS: A COLLABORATIVE ENVIRONMENTAL PROTECTION AGENCY RESEARCH PROGRAM TO DEVELOP AND EVALUATE ECOSYSTEM RESTORATION AND MANAGEMENT OPTIONS TO ACHIEVE ECOLOGICALLY AND ECONOMICALLY SUSTAINABLE SOLUTIONS |
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The U.S. Environmental Protection Agency (U.S. EPA) is evaluating ecosystem restoration and management techniques to ensure they create sustainable solutions for degraded watershed...
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RESTORATION PLUS: A COLLABORATIVE RESEARCH PROGRAM TO DEVELOP AND EVALUATE ECOSYSTEM RESTORATION AND MANAGEMENT OPTIONS TO ACHIEVE ECOLOGICALLY AND ECONOMICALLY SUSTAINABLE SOLUTIONS |
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EPA is evaluating ecosystem restoration and management techniques to ensure they create sustainable solutions for degraded watersheds. ORD NRMRL initiated the Restoration Plus (ReP...
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RESTORING NATURE IN THE CITY: PUGET SOUND EXPERIENCES. (R825284) |
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Restoring nature within American urban areas seems basic to sustainability both in theory (Hough, 1995) and in practice (Sustainable Seat...
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RESTORING SUBURBAN WATERSHEDS USING A MULTIDISCIPLINARY APPROACH TO STORMWATER MANAGEMENT |
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In mixed-use, suburban watersheds, stormwater runoff from impervious surfaces on both public and private property impairs stream ecosystems. Decentralized stormwater management, w...
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RETROFIT STORMWATER MANAGEMENT: NAVIGATING MULTIDISCIPLINARY HURDLES AT THE WATERSHED SCALE |
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Stormwater runoff from extensive impervious surfaces in urban and suburban areas has led to human safety risks and stream ecosystem impairment, triggering an interest in watershed-...
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RETROSPECTIVE LANDSCAPE ANALYSIS, AN APPROACH FOR EVALUATION LAND COVER CHANGE: SAN PEDRO RIVER CASE STUDY |
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Vegetation change in the American West has been the subject of much concern and controversy throughout the twentieth century. Over the years, a considerable number and variety ...
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REVERSE AUCTION RESULTS FOR IMPLEMENTATION OF DECENTRALIZED RETROFIT BEST MANAGEMENT PRACTICES IN A SMALL URBAN WATERSHED (CINCINNATI OH) |
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Although urban stormwater is typically conveyed to centralized infrastructure, there is great potential for reducing stormwater runoff quantity through decentralization. In this ca...
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RIBBED MUSSEL NITROGEN ISOTOPE SIGNATURES REFLECT NITROGEN SOURCES IN COASTAL MARSHES |
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The stable nitrogen isotope ratio in tissue of the ribbed mussel (Geukensia demissa) was investigated as an indicator of the source of nitrogen inputs to coastal salt marshes. Init...
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RIPARIAN AREAS OF AN AGRICULTURAL LANDSCAPE IN WESTERN OREGON |
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The Willamette Valley is a productive, diversified agricultural area in western Oregon. Pastureland and grass seed fields, mostly located on poorly drained soils, account for 60% ...
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RIPARIAN BUFFER WIDTH, VEGETATIVE COVER, AND NITROGEN REMOVAL EFFECTIVENESS: A REVIEW OF CURRENT SCIENCE AND REGULATIONS |
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Riparian zones, the vegetated region adjacent to streams and wetlands, are thought to be effective at intercepting and controlling nitrogen loads entering water bodies. Buffer wid...
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RIPARIAN BUFFER WIDTH, VEGETATIVE COVER, AND NITROGEN REMOVAL EFFECTIVENESS: A REVIEW OF CURRENT SCIENCE AND REGULATIONS |
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Riparian zones, the vegetated region adjacent to streams and wetlands, are thought to be effective at intercepting and controlling nitrogen loads entering water bodies. Buffer wid...
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RIPARIAN CHARACTERIZATION USING SUB-PIXEL ANALYSIS OF LANDSAT TM IMAGERY FOR USE IN ECOLOGICAL RISK ASSESSMENT |
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Landuse/land cover and riparian corridor characterization for 7 major watersheds in western Ohio was accomplished using sub-pixel analysis and traditional classification techniques...
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RIPARIAN RESTORATION: CURRENT STATUS AND THE REACH TO THE FUTURE |
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Nine articles in the special issure of Restoration Ecology addressing the subject of site selection for riparian restoration activities were critically examined for this review. Th...
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RIPARIAN VEGETATION AND CHANNEL MORPHOLOGY IMPACT ON SPATIAL PATTERNS OF WATER QUALITY IN AGRICULTURAL WATERSHEDS |
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A model based on the KLS factors of the Universal Soil Loss Equation (USLE) accurately predicted temporal dynamics and relative peak levels of suspended solids, turbidity, and phos...
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RISK ASSESSMENT AND MANAGEMENT OF WATER SUPPLY SYSTEM - INFRASTRUCTURE INITIATIVE FOR THE 21ST CENTURY |
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The current problem in the United States is that the water infrastructure is aging and spending has not been adequate to repair, replace, or rehabilitate drinking water distributio...
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RISK MANAGEMENT EVALUATION FOR CONCENTRATED ANIMAL FEEDING OPERATIONS |
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The National Risk Management Research Laboratory (NRMRL) developed a Risk Management Evaluation (RME) to provide information needed to help plan future research in the Laboratory d...
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RISK MANAGEMENT OF SEDIMENT STRESS: A FRAMEWORK FOR SEDIMENT RISK MANAGEMENT RESEARCH |
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Research related to the ecological risk management of sediment stress in watersheds is placed under a common conceptual framework in order to help promote the timely advance of dec...
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RISK MANAGEMENT RESEARCH PLAN FOR WET WEATHER FLOWS |
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This plan was prepared by the National Risk Management Research Laboratory (NRMRL) of EPA's Office of Research and Development (ORD) to guide the risk management aspects of the ur...
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RIVER AND WATERSHED PLANNING: THE SAN LUIS REY CASE STUDY |
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The environmental management of our water resources requires the integration of science and politics, defining problems and solutions for physical resources within a social context...
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ROAD SALT APPLICATION CREATES A UNIQUE CHLORIDE BIOCHEMISTRY IN AN URBAN STREAM OF THE CHESAPEAKE BAY WATERSHED |
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Recent evidence from the mid-Atlantic suggests that freshwater supplies are threatened by chronic chloride inputs from road salts applied to improve highway safety. Elevated chlor...
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ROLE OF ANTHROPOGENIC AND ENVIRONMENTAL VARIABLE ON THE PHYSIOLOGICAL AND ECOLOGICAL RESPONSES OF OYSTERS IN SOUTHWEST FLORIDA ESTUARIES |
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The role of freshwater alterations and seasonal changes on the ecological and physiological responses of oysters were investigated in the Caloosahatchee River, Estero Bay and Faka-...
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ROLE OF CREATED AND NATURAL WETLANDS IN CONTROLLING NONPOINT SOURCE POLLUTION |
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Nonpoint source (NPS) pollution control and wetlands protection are two overlapping scientific and policy issues of the U.S. Environmental Protection Agency. reated, restored, and ...
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ROLE OF PRECIPITATION CHEMISTRY VERSUS OTHER WATERSHED PROPERTIES IN WISCONSIN LAKE ACIDIFICATION |
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Data for over 100 watershed properties, including aspects of topography, hydrology, geology, soils, vegetation, lake morphometry and input precipitation chemistry, have been develo...
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ROLE OF RED ALDER IN NITROGEN LOSSES FROM FORESTED WATERSHEDS IN THE OREGON COAST RANGE |
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Variations in plant community composition across the landscape may have strong impacts on nutrient losses from small forested watersheds. One extreme example of this impact is the...
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ROSGREN STREAM TYPES AS A TOOL FOR PREDICTING BEDLOAD AND SUSPENDED SEDIMENT EXPORT IN LOW-ORDER LAKE SUPERIOR WATERSHEDS |
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Bedload samples were collected from 48 second and third order Lake Superior tributaries during snowmelt in 1998 and 1999. Suspended sediment samples were collected over a three-ye...
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Rain Garden Research at EPA’s Urban Watershed Research Facility |
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Summary of the ongoing rain garden research at UWMB. The context for the study was described as well as the experimental design for the full-scale study, instrumentation, and stor...
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Rain Garden Research at EPA’s Urban Watershed Research Facility: Promoting Nitrate Removal through Rain Garden Design |
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Rain gardens are designed to infiltrate stormwater, capture suspended solids, sorb heavy metals and phosphorus, and transform nutrients through biological processes. Most studies ...
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Rain Garden Research at NRMRL’s Urban Watershed Research Facility: Evaluating Pollutant Removal Performance |
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This slide was displayed on a TV screen along with slides from other ORD postdocs at the EPA Science Forum Postdoc Exhibit, May 20-22. The slide illustrated the rain garden resear...
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Relationship Between Watershed Land Use and Denitrification Enzyme Activity in Headwater Streams |
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Headwater streams are the dominant land-water interface across much of the landscape. Denitrification is an important ecological service provided by headwater streams. Anthropogeni...
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Reverse auction results for implementation of decentralized retrofit best management practices in a small urban watershed (Cincinnati OH)Participatory storm water management and sustainability – what are the connections? |
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Urban stormwater is typically conveyed to centralized infrastructure, and there is great potential for reducing stormwater runoff quantity through decentralization. In this case we...
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Role Of Spatial Scale In Sub-Area Prioritization To Reduce Impact Of Planned Land Use/Cover Alternations Of Watershed Responses |
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An index based methodology is presented that rank the sub-areas in a watershed based on their relative impacts on watershed response to anticipated land developments. We argue in t...
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SALT MARSH HABITAT FROM A FISH EYE VIEW: A TEST OF THE DIMENSIONLESS INDEX OF HABITAT COMPLEXITY |
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Salt marshes are considered important foraging and predator refuge areas for fish, but these functions are rarely measured. The goal of this study was to examine the relationship ...
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SAN PEDRO GEODATA BROWSER |
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The San Pedro Data Browser was developed by the Landscape Ecology Branch of the U.S. Environmental Protection Agency (Las Vegas, NV). The goal of the Landscape Sciences Program is ...
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SAN PEDRO WATERSHED DATABASE |
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The San Pedro River Geo-Data Browser was jointly developed by the Landscape Ecology Branch of the U.S. Environmental Protection Agency and the U.S. Department of Agriculture, Agric...
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SAVANNAH RIVER BASIN LANDSCAPE ANALYSIS |
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Scientists from the U.S. Environmental Protection Agency (EPA), Region 4, Science and Ecosystem Support Division, enlisted the assistance of the landscape ecology group of U.S. EPA...
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SCENARIO ANALYSIS FOR THE SAN PEDRO RIVER, ANALYZING HYDROLOGICAL CONSEQUENCES FOR A FUTURE ENVIRONMENT |
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Studies of future management and policy options based on different assumptions provide a mechanism to examine possible outcomes and especially their likely benefits and consequence...
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SCENARIO ANALYSIS FOR THE SAN PEDRO RIVER, ANALYZING HYDROLOGICAL CONSEQUENCES OF A FUTURE ENVIRONMENT |
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Studies of future management and policy options based on different assumptions provide a mechanism to examine possible outcomes and especially their likely benefits and consequence...
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SCENARIO ANALYSIS FOR THE SAN PEDRO RIVER, ANALYZING HYDROLOGICAL CONSEQUENCES OF A FUTURE ENVIRONMENT |
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The San Pedro River in Arizona and Sonora, Mexico is an area that has undegone rapid changes in land use and cover, and subsequently is facing keen environmental crises related to ...
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SCIENCE FOR INTEGRATED WATERSHED MANAGEMENT: A MULTI-SCALE EXPERIMENTAL CASE STUDY LINKING LAND USE MANAGEMENT PRACTICES AND WATER QUALITY IN SOUTHERN OHIO |
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Although it is routine for watershed management programs to coincide the monitoring of land use impacts and water quality at different spatial scales, rarely are the data collected...
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SCIENCE OF INTEGRATED WATERSHED MANAGEMENT: LINKING POLLUTANT CONTROL PRACTICES WITH WATER QUALITY |
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SCIENCE OF INTEGRATED WATERSHED MANAGEMENT: LINKING POLLUTANT CONTROL PRACTICES WITH WATER QUALITY
M. Morrison (NRMRL), C. Nietch (NRMRL), 1. Schubauer-Berigan (NRMRL), M. Hantu...
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SCOPE AND ASSESSMENT OF AQUATIC EFFECTS DUE TO ACIDIC DEPOSITION |
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The 1990 NAPAP Integrated Assessment (IA) will address the current status of surface waters in regions potentially susceptible to acidic deposition, evaluate historical changes tha...
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SCREENING TO IDENTIFY AND PREVENT URBAN STORM WATER PROBLEMS: ESTIMATING IMPERVIOUS AREA ACCURATELY AND CHEAPLY |
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Complete identification and eventual prevention of urban/suburban water quality problems pose significant monitoring challenges. Uncontrolled growth of impervious surfaces (roads,...
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SCREENING TO IDENTIFY AND PREVENT URBAN STORM WATER PROBLEMS: ESTIMATING IMPERVIOUS AREA ACCURATELY AND INEXPENSIVELY |
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Complete identification and eventual prevention of urban water quality problems pose significant monitoring, "smart growth" and water quality management challenges. Uncontrolled i...
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SEAGRASS DISTRIBUTION IN THE PENSACOLA BAY SYSTEM, NORTHWEST FLORIDA |
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Seagrass coverage in the northern Gulf of Mexico has decreased 20 to 100% in many estuaries since the 1950s. As a result, determination of seagrass coverage and identification of ...
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SEASONAL AND LONG-TERM TREND DECOMPOSITION ALONG A SPATIAL GRADIENT: AN APPLICATION TO NUTRIENT DATA IN THE NEUSE RIVER WATERSHED. (U915590) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SEASONAL RELATIONSHIPS BETWEEN DISSOLVED NITROGEN AND WOODY VEGETATION AT MULTIPLE SPATIAL SCALES IN THE CALAPOOIA RIVER WATERSHED, OREGON, USA |
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abstract/abstract...
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SEASONAL VARIATIONS IN NUTRIENT CONCENTRATIONS AND RIVER FLOW IN A NORTHWESTERN USA WATERSHED |
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Dissolved nutrient concentrations were measured in the Yaquina River, Oregon from 1998 through 2001 to determine the watershed loading to Yaquina estuary. The effects of storms on...
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SEASONAL VARIATIONS IN NUTRIENT CONCENTRATIONS AND RIVER FLOW IN A NORTHWESTERN USA WATERSHED |
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Dissolved nutrient concentrations were measured in the Yaquina River, Oregon from 1998 through 2001 to determine nutrient loading from the watershed as part of a larger agency pro...
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SEASONAL VARIATIONS IN RIVER DISCHARGE AND NUTRIENT EXPORT TO A NORTHEASTERN PACIFIC ESTUARY |
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Seasonal variations in dissolved nitrogen and silica loadings were related to seasonal variability in river discharge. Dissolved nutrient concentrations measured weekly at three st...
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SEASONAL VARIATIONS IN RIVER DISCHARGE AND NUTRIENT EXPORT TO A NORTHEASTERN PACIFIC ESTUARY (FINAL) |
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Seasonal variations in dissolved nitrogen and silica loadings were related to seasonal variability in river discharge. Dissolved nutrient concentrations measured weekly at three st...
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SEDIMENT BUDGET OF A MIXED-LAND USE, URBANIZING WATERSHED. (R825284) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SEDIMENT DENITRIFICATION IN THE YAQUINA ESTUARY, OREGON |
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Rivers draining watersheds of the Coast Range in the northwestern United States frequently contain high concentrations of dissolved nitrate, particularly after high flow events (up...
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SEDIMENT SOURCES IN AN URBANIZING, MIXED LAND-USE WATERSHED. (R825284) |
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AbstractThe Issaquah Creek watershed is a rapidly urbanizing watershed of 144 km2 in western Washington, where sediment aggradation of the main channel ...
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SELECTING LEAST-DISTURBED SURVEY SITES FOR GREAT PLAINS STREAMS AND RIVERS |
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True reference condition probably does not exist for streams in highly utilized regions such as the Great Plains. Selecting least-disturbed sites for large regions is confounded b...
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SELECTION OF CANDIDATE EUTROPHICATION MODELS FOR TOTAL MAXIMUM DAILY LOADS ANALYSES |
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A tiered approach was developed to evaluate candidate eutrophication models to select a common suite of models that could be used for Total Maximum Daily Loads (TMDL) analyses in e...
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SEMINAR PUBLICATION - NATIONAL CONFERENCE ON URBAN RUNOFF MANAGEMENT: ENHANCING URBAN WATERSHED MANAGEMENT AT THE LOCAL, COUNTY, AND STATE LEVELS |
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As stormwater and snowmelt flow across the urban landscape, countless contaminants are carried into our rivers, lakes, and estuaries. The effects of these contaminant discharges on...
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SEMINAR PUBLICATION: NATIONAL CONFERENCE ON ENVIRONMENTAL PROBLEM-SOLVING WITH GEOGRAPHIC INFORMATION SYSTEMS |
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The National Conference on Environmental Problem Solving with Geographic Information Systems was held in Cincinnati, Ohio, September 21-23, 1994. The conference was a forum for o...
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SEMINAR PUBLICATION: NATIONAL CONFERENCE ON URBAN RUNOFF MANAGEMENT-ENHANCING URBAN WATERSHED MANAGEMENT AT THE LOCAL, COUNTY, AND STATE LEVELS (EPA/625/R-95/003) |
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This document presents the technical information presented at the National Conference on Urban Runoff Management held in Chicago, IL, on March 30-April 2, 1993. This conference was...
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SEMINAR PUBLICATION: NONPOINT SOURCE WATERSHED WORKSHOP |
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On January 29-31, 1991 the U.S. EPA's Center for Environmental Research Information ind Nonpoint Source Control Branch sponsored tile Nonpoint Source Watershed Workshop. he worksho...
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SENSITIVITY ANALYSIS OF AGGREGATED ENVIRONMENTAL INDICES WITH A CASE-STUDY OF THE MID-ATLANTIC REGION |
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Environmental indicators are often aggregated into a single index for various purposes in environmental studies. Aggregated indices derived from the same data set can differ, usual...
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SENSITIVITY ANALYSIS OF THE APPLICATION OF CHEMICAL EXPOSURE CRITERIA FOR COMPARING SITES AND WATERSHEDS |
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A methodology was developed for deriving quantitative exposure criteria useful for comparing a site or watershed to a reference condition. The prototype method used indicators of e...
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SHEPHERD CREEK, CINCINNATI, OH: USING TRADABLE CREDITS TO CONTROL EXCESS STORMWATER RUNOFF |
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The problem of managing stormwater runoff grows apace with continued urbanization, yet the management tools for this growing non-point source problem have not fully kept up. Th...
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SHOULD ECOLOGICAL REGIONS OR LAND-COVER COMPOSITION GUIDE ESTABLISHMENT OF NUTRIENT CRITERIA? |
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The continuing expansion of anthropogenic influence across the continental United States has motivated the establishment of nutrient criteria for streams, lakes, and estuaries as a...
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SIMULATED CHANGES IN RUNOFF AND SEDIMENT IN DEVELOPING AREAS NEAR BENSON, ARIZONA |
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Residential and commercial development is occurring with unprecedented speed throughout the American Southwest. It is projected that from 1995 to 2025, the population in the six So...
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SIMULATED IMPACTS OF SMALL-SCALE SPATIAL DISTRIBUTION OF IMPERVIOUS AREA ON RUNOFF RESPONSE OF FIELD-SCALE CATCHMENTS |
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Impervious surface is known to negatively affect catchment hydrology through both its extent and spatial distribution. In this study, we empirically quantify via model simulations ...
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SIMULATED RESPONSES OF THE GULF OF MEXICO HYPOXIA TO VARIATIONS IN CLIMATE AND ANTHROPOGENIC NUTRIENT LOADING. (R827785E02) |
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A mathematical model was used to simulate monthly responses of the Gulf of Mexico hypoxia to variations in climate and anthropogenic nutrient loading over a 45-year period. We e...
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SIMULATING INTEGRATED MULTIMEDIA CHEMICAL FATE AND TRANSPORT FOR NATIONAL RISK ASSESSMENTS |
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The site-based multimedia, multipathway and multireceptor risk assessment (3MRA) approach is comprised of source, fate and transport, exposure and risk modules. The main interconn...
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SIMULATING RUNOFF BEHAVIOR IN AN URBANIZING WATERSHED. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SIMULATING SPATIAL NITROGEN DYNAMICS IN A FORESTED REFERENCE WATERSHED, HUBBARD BROOK WATERSHED 6, NEW HAMPSHIRE, USA. (R827958) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SIMULATING SUB-DECADAL CHANNEL MORPHOLOGIC CHANGE IN EPHEMERAL STREAM NETWORKS |
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A distributed watershed model was modified to simulate cumulative channel morphologic
change from multiple runoff events in ephemeral stream networks. The model incorporates th...
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SIMULATION COASTAL PLAIN STREAM FISH COMMUNITY RESPONSE TO NONPOINT SOURCE POLLUTION USING LINKED HYDROLOGIC-ECOLOGICAL MODELS |
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Nonpoint source pollution is the primary stress in many streams. Characteristic declines in stream fish communities are recognized in streams influenced by nonpoint source polluti...
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SIMULATION MODEL FOR WATERSHED MANAGEMENT PLANNING. VOLUME 1. MODEL THEORY AND FORMULATION |
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Evaluation of nonpoint source pollution problems requires an understanding of the behavioral response to an ecosystem to the impacts of land use activities on individual components...
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SIMULATION MODEL FOR WATERSHED MANAGEMENT PLANNING. VOLUME 2. MODEL USER MANUAL |
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This report provides a user manual for the hydrologic, nonpoint source pollution simulation of the generalized planning model for evaluating forest and farming management alternati...
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SIRE SPECIFIC NUTRIENT REFERENCE CONDITIONS DETERMINED AS FUNCTIONS OF WATERSHED LAND-USE/LAND-COVER AND GEOMORPHOLOGY: IMPLICATIONS OF NUTRIENT CRITERIA DEVELOPMENT |
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Abstract and Oral Presentation for SETAC...
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SITE SELECTION FOR RIPARIAN WETLAND RESTORATION USING A GEOGRAPHIC INFORMATION SYSTEM |
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Long-term success of wetland restoration efforts depends on a thorough consideration of hydrology during site selection processes. his paper describes a Geographic Information Syst...
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SITE SELECTION PROCEDURES FOR TEMPORALLY INTEGRATED MONITORING OF ECOSYSTEMS (TIME) |
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A long term program to monitor aquatic ecosystems requires a long-term commitment of significant resources. o maximize the effectiveness of such a program, monitoring sites must be...
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SITE-SPECIFIC DIAGNOSTIC TOOLS |
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US EPA's Office of Water is proposing Combined Assessment and Listing Methods (CALM) to
meet reporting requirements under both Sections 305b and 303d for chemical and nonchemica...
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SMALL AREA ESTIMATION IN A WATERSHED EROSION ASSESSMENT SURVEY. (R829095C002) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SMALL AREA ESTIMATION OF INDICATORS OF STREAM CONDITION FOR MAIA USING HIERARCHICAL BAYES PREDICTION MODELS |
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Probability surveys of stream and river resources (hereafter referred to as streams) provide reliable estimates of stream condition when the areas for the estimates have sufficient...
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SOIL ALUMINUM DISTRIBUTION IN THE NEAR-STREAM ZONE AT THE BEAR BROOK WATERSHED IN MAINE |
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Near-stream and upslope soil chemical properties were analyzed to infer linkages between soil and surface water chemistry at the Bear Brook Watershed in Maine [BBWM]. Organic and m...
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SOIL ALUMINUM DISTRIBUTION IN THE NEAR-STREAM ZONE AT THE BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SOIL N AND C GEOGRAPHY OF THE SALMON RIVER WATERSHED AND THE OREGON COAST |
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To help establish restorative criteria of salmon runs in the Pacific Northwest, resource inventories on affected watersheds are a critical component of this process. Diverse soil ...
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SOIL TYPE AND FOREST VEGETATION INFLUENCES ON FOREST FLOOR NITROGEN DYNAMICS AT THE BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SOME EMERGING ISSUES IN WATERSHED MANAGEMENT LANDSCAPE PATTERNS SUSTAINABILITY WITH CUMULATIVE ENVIRONMENTAL CHANGE |
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Emerging issues in watershed management include the need to assess the effects of management activities on the time scale of several cutting rotations (>100 yrs) and on spatial sac...
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SOUND SURVEY DESIGNS CAN FACILITATE INTEGRATING STREAM MONITORING DATA ACROSS MULTIPLE PROGRAMS |
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Multiple agencies in the Pacific Northwest monitor the condition of stream networks or their watersheds. Some agencies use a stream "network" perspective to report on the fraction ...
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SOURCE WATER PROTECTION: ITS ROLE IN CONTROLLING DISINFECTION BY-PRODUCTS (DBPS) AND MICROBIAL CONTAMINANTS |
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Passage of 1996 Safe Drinking Water Act Amendments (SDWAA) has focused the attention of wter utility managers and public health and regulatory officials on source water protection ...
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SOURCES AND TRANSPORT OF NUTRIENTS IN COASTAL PLAIN WATERSHEDS AND THE EFFECTS OF THESE NUTRIENTS ON ESTUARINE ECOSYSTEMS |
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Poster for the EPA Science Forum.
This collaborative research effort assessed how changing coastal plain watershed land-uses influence the delivery of nutrients and sediment...
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SOURCES OF ACIDITY IN LAKES AND STREAMS OF THE UNITED STATES |
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Acidic surface waters in the United States sampled in the National Surface Water Survey (NSWS) were classified into three groups according to their probable sources of acidity: (1)...
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SPATIAL AND TEMPORAL VARIABILITY AND DRIVERS OF NET ECOSYSTEM METABOLISM IN WESTERN GULF OF MEXICO ESTUARIES |
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Net ecosystem metabolism (NEM) is becoming a commonly used ecological indicator of estuarine ecosystem metabolic rates. Estuarine ecosystem processes are spatially and temporally ...
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SPATIAL CONSIDERATIONS FOR LINKING WATERSHED LAND COVER TO ECOLOGICAL INDICATORS IN STREAMS. (R828684C003) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SPATIAL CONSIDERATIONS FOR LINKING WATERSHED LANDCOVER TO ECOLOGICAL INDICATORS IN STREAMS. (R828684) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SPATIAL CONSIDERATIONS FOR LINKING WATERSHED LANDCOVER TO ECOLOGICAL INDICATORS IN STREAMS. (R828684C001) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SPATIAL FOREST SOIL PROPERTIES FOR ECOLOGICAL MODELING IN THE WESTERN OREGON CASCADES |
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The ultimate objective of this work is to provide a spatially distributed database of soil properties to serve as inputs to model ecological processes in western forests at the lan...
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SPATIAL INDICATORS OF ECOLOGICAL CONDITION IN THE WESTERN UNITED STATES |
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This presentation highlights the development of spatial and landscape indicators by the EPA's Western EMAP Landscape Working group. The presentation highlights work being conducte...
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SPATIAL PATTERN OF FUTURE VULNERABILITY OF STREAM EUTROPHICATION IN THE MID-ATLANTIC REGION OF THE UNITED STATES |
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Spatially explicit identification of changes in ecological conditions over large areas is key to targeting and prioritizing areas for environmental protection and restoration by m...
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SPATIAL PATTERN OF WATER POLLUTION RISK IN MARYLAND, USA |
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Numerous field studies show that nitrogen (and phosphorous)export coefficients are significantly different acroos forest, agriculture, and urban land-cover types. We treated these...
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SPATIAL PATTERNS AND ECOLOGICAL DETERMINANTS OF BENTHIC ALGAL ASSEMBLAGES IN MID-ATLANTIC STREAMS, USA |
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We attempted to identify spatial patterns and determinants for benthic algal assemblages in Mid-Atlantic streams. Periphyton, water chemistry, stream physical habitat, riparian co...
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STABLE GENETIC STRUCTURE OF CENTRAL STONEROLLER POPULATIONS IN A POLLUTED URBAN STREAM |
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Mill Creek, which runs through Cincinnati, Ohio, is one of the most severely polluted urban streams in the United States. The creek is threatened by streamside landfills and toxic...
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STABLE ISOTOPES AS INDICATORS OF SOIL WATER DYNAMICS IN WATERSHEDS |
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Stream water quality and quantity depend on discharge rates of water and nutrients from soils. However, soil-water storage is very dynamic and strongly influenced by plants. We a...
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STABLE SULFUR ISOTOPES OF SULFATE IN PRECIPITATION AND STREAM SOLUTIONS IN A NORTHERN HARDWOODS WATERSHED |
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table 5 isotopes of 5042 in precipitation and stream solutions in a northern hardwoods watershed (Bear Brooks Watershed, Maine) were examined to determine sources of stream S042- a...
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STAKEHOLDER PERSPECTIVES ON ILLINOIS RIVER WATERSHED IMPACTS. (R825791) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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STAKEHOLDER VALUES AND SCIENTIFIC MODELING IN THE NEUSE RIVER WATERSHED. (U915590) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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STATEWIDE EMPIRICAL MODELING OF BACTERIAL CONTAMINATION OF SURFACE WATERS |
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Bacterial contamination of surface waters is attributed to both urban and agricultural land use practices,and is one of the most frequently cited reasons for failure to meet standa...
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STATISTICAL TECHNIQUES FOR DETERMINATION AND PREDICTION OF FUNDAMENTAL FISH ASSEMBLAGES OF THE MID-ATLANTIC HIGHLANDS |
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A statistical software tool, Stream Fish Community Predictor (SFCP), based on EMAP stream sampling in the mid-Atlantic Highlands, was developed to predict stream fish communities u...
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STEPS FORWARD IN WETLAND MONITORING AND ASSESSMENT |
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The recent report of the National Research Council on wetland mitigation again highlighted the need for regional watershed evaluation as a context from which to determine the effic...
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STONY CORAL RAPID BIOASSESSMENT PROTOCOL |
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At a time when coral reefs worldwide are in the greatest decline of their known existence, and despite the enormous value of coral reef ecosystem services, there are relatively few...
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STORMWATER BEST MANAGEMENT PRACTICE MONITORING |
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Implementation of an effective BMP monitoring program is not a straight-forward task. BMPs by definition are devices, practices, or methods used to manage stormwater runoff. This...
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STORMWATER BEST MANAGEMENT PRACTICES DESIGN GUIDE VOLUME 1 - GENERAL CONSIDERATIONS |
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This document is Volume 1 of a three volume series that provides guidance on the selection and design of stormwater management Best Management Practices (BMPs). This first volume ...
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STORMWATER BEST MANAGEMENT PRACTICES TEST FACILITY - SWALES |
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The NRMRL swale evaluation is part of a larger collection of long-term research projects that evaluates many Best Management Practices. EPA
has ongoing research examining the perf...
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STORMWATER MANAGEMENT AND LOW IMPACT DEVELOPMENT PRESENTATION DESCRIPTION |
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Low Impact Development (LID) is the general term typically used to characterize a comprehensive array of site planning, design and pollution prevention strategies that when combine...
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STORMWATER MANAGEMENT TO IMPROVE LAKE WATER QUALITY |
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Many investigators have identified the urban environments as those producing high levels of water pollutants relative to other land uses. In a 59 hectare (146 acre) urban watershed...
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STORMWATER POLLUTION ABATEMENT TECHNOLOGIES |
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This publication presents information regarding best management practices (BMP's) and pollution abatement technologies that can provide treatment of urban stormwater runoff. nclude...
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STORMWATER, PARTICIPATORY ENVIRONMENTAL MANAGEMENT, AND SUSTAINABILITY – WHAT ARE THE CONNECTIONS? |
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Urban stormwater is typically conveyed to centralized infrastructure, and there is great potential for reducing stormwater runoff quantity through decentralization. In this case we...
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STRATEGIES FOR ASSESSING THE CUMULATIVE EFFECTS OF WETLAND ALTERATION ON WATER QUALITY |
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Assessment of cumulative impacts on wetlands can benefit by recognizing three fundamental wetland categories: basin, riverine, and fringe. hc geomorphological settings of these cat...
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STRATEGIES FOR DEVELOPING A RAPID ASSESSMENT METHOD TO EVALUATE WETLAND CONDITION |
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abstract for presentation...
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STRATIGRAPHIC EVIDENCE OF HUMAN TURBANCE IN SOME CHESAPEAKE BAY TRIBUTARIES |
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Response of diatom (algal) and submerged macrophyte (angiospermous) populations to disturbance in some Chesapeake Bay tributaries over the last few centuries is interpreted from ab...
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STREAM BOTTOM CHARACTERISTICS AS A FUNCTION OF HYDROGEOMORPHIC REGION, FOREST FRAGMENTATION, AND WATERSHED VARIABLES |
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Stream bottom characvteristics were compared for 24 secod-order watersheds in the western Lake Superior basin to estimate types and quantities of sediment available for export and ...
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STREAM BOTTOM CHARACTERISTICS AS A FUNCTION OF HYDROGEOMORPHIC REGION, MATURE FOREST COVER, AND WATERSHED VARIABLES |
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Stream bottom characteristics were compared for 24 second-order watersheds in the western Lake Superior basin to estimate types and quantities of sediment available for export and ...
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STREAM BOTTOM CHARACTERISTICS AS A FUNCTION OF HYDROGEOMORPHIC REGION, WATERSHED, STORAGE, AND FOREST FRAGMENTATION |
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Stream bottom characteristics were compared for 24 second-order watersheds in the western Lake Superior basin, to estimate types and quantities of sediment available for export and...
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STREAM CHEMISTRY IN THE EASTERN UNITED STATES: I. SYNOPTIC SURVEY DESIGN, ACID-BASE STATUS, AND REGIONAL PATTERNS |
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To assess the regional acid-base status of streams in the Mid-Atlantic and Southeastern United States, spring baseflow chemistry was surveyed in a probability sample of 500 stream ...
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STREAM CHEMISTRY IN THE EASTERN UNITED STATES: II. CURRENT SOURCES OF ACIDITY AND LOW ANC STREAMS |
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We examined anion composition in National Stream Survey (NSS) data in order to evaluate the most probable sources of current acidity in acidic and low acid neutralizing capacity (A...
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STREAM CORRIDOR RESTORATION AND ITS POTENTIAL TO IMPROVE WATER QUALITY |
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Watershed stream corridors are being degraded by anthropogenic impacts of increased flow from runoff, sediment loading from erosion and contaminants such as nitrate from non-point ...
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STREAM INVERTEBRATE COMMUNITY RESPONSE TO INCREASED WATERSHED IMPERVIOUSNESS. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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STREAM TEMPERATURE SIMULATION OF FORESTED RIPARIAN AREAS: I. WATERSHED-SCALE MODEL DEVELOPMENT |
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To simulate stream temperatures on a watershed scale, shading dynamics of topography and riparian vegetation must be computed for estimating the amount of solar radiation that is a...
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STREAM TEMPERATURE SIMULATION OF FORESTED RIPARIAN AREAS: II. MODEL APPLICATION |
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The SHADE-HSPF modeling system described in a companion paper has been tested and applied to the Upper Grande Ronde (UGR) watershed in northeast Oregon. Sensitivities of stream tem...
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STREAMBED PARTICLE SIZE FROM PEBBLE COUNTS USING VISUALLY ESTIMATED SIZE CLSASES: JUNK OR USEFUL DATA? |
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In large-scale studies, it is often neither feasible nor necessary to obtain the large samples of 400 particles advocated by many geomorphologists to adequately quantify streambed...
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STREAMWATER ACID-BASED CHEMISTRY AND CRITICAL LOADS OF ATMOSPHERIC SULFUR DEPOSITION IN SHENANDOAH NATIONAL PARK, VIRGINIA |
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A modeling study was conducted to evaluate the acid-base chemistry of streams within Shenandoah National Park, Virginia and to project future responses to sulfur (S) and nitrogen (...
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STRESSOR-RESPONSE RELATIONSHIPS AT NATIONAL AND REGIONAL SCALES FOR FISH AND BENTHOS ASSEMBLAGES |
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Between 2000 and 2004, the U.S. Environmental Protection Agency conducted a nationwide probability survey of over 1,600 wadeable streams to assess ecological condition in terms of ...
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SUB-PIXEL RAINFALL VARIABILITY AND THE IMPLICATIONS FOR UNCERTAINTIES IN RADAR RAINFALL ESTIMATES |
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Radar estimates of rainfall are subject to significant measurement uncertainty. Typically, uncertainties are measured by the discrepancies between real rainfall estimates based on...
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SUBGRID PARAMETERIZATION OF SNOW DISTRIBUTION FOR AN ENERGY AND MASS BALANCE SNOW COVER MODEL. (R824784) |
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Representation of sub-element scale variability in snow accumulation and ablation is increasingly recognized as important in distributed hydrologic modelling. Representing sub-grid...
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SUBMERGED AQUATIC VEGETATION IN UPPER CHESAPEAKE BAY: STUDIES RELATED TO POSSIBLE CAUSES OF THE RECENT DECLINE IN ABUNDANCE |
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This paper provides a synthesis of research conducted on possible causes of the decline in abundance of submerged aquatic vegetation (SAV) in upper Chesapeake Bay beginning in the ...
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SUBSURFACE RESIDENCE TIMES AS AN ALGORITHM FOR AQUIFER SENSITIVITY MAPPING: TESTING THE CONCEPT WITH GROUND WATER MODELS IN THE CONTENTNEA CREEK BASIN, NORTH CAROLINA, USA |
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This poster will present a modeling and mapping assessment of landscape sensitivity to non-point source pollution as applied to a hierarchy of catchment drainages in the Coastal Pl...
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SUBTERRANEAN TERMITES: REGULATORS OF SOIL ORGANIC MATTER IN THE CHICHUAHUAN DESERT |
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Soil organic matter and the abundance of subterranean termites were measured at 89 locations spaced at 30-m intervals from the bottom of the top of a small desert watershed. here w...
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SULFUR DYNAMICS IN MINERAL HORIZONS OF TWO NORTHERN HARDWOOD SOILS A COLUMN STUDY WITH 35S |
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Sulfur dynamics of two Spodosols were ascertained using soil columns constructed from homogenized mineral soil from northern hardwood ecosystems at the Huntington Forest (HF) in th...
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SUMMER STREAM TEMPERATURES, JUVENILE COHO CONDITION FACTORS AND BLACK SPOT INFECTION IN THE OREGON COAST RANGE |
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We monitored stream temperatures at 35 locations throughout the West Fork Smith River watershed in the Oregon Coast Range during the summer of 2002. Between July 24 and August 24, ...
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SURFACE AND SUBSURFACE WATER QUALITY HYDROLOGY IN SURFACE MINED WATERSHEDS. PART I: TEXT |
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Surface mining disturbs the natural sequence of geologic strata, and, therefore, potentially modifies the quantity and quality of water on a watershed disturbed by surface mining. ...
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SURFACE WATER FLOW IN LANDSCAPE MODELS: 2. PATUXENT WATERSHED CASE STUDY. (R824766) |
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AbstractWe developed a system for modeling regional, spatially explicit hydrology in a way that allows integration with broader plant, nutrient, and socio-economic mode...
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SURFACE WATER HYDROLOGY IN INTEGRATED WATERSHED MODELS: PATUXENT CASE STUDY. (R824766) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SURVEY OF LOW FLOW DRAINAGES AND SEEPS IN COLORADO TO ASSESS IMPLEMENTABILITY OF PASSIVE TREATMENT OPTIONS |
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Low flow drainages and seeps are typically not evaluated for mitigation due to the perceived low impact on the watershed. However, localized metals concentrations and acidity can ...
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SURVEYING THE CONDITION OF STREAMS AND WATERSHEDS IN THE PACIFIC NORTHWEST |
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Numerous federal, state, and tribal agencies are paying increasing attention to the need to obtain information about the ecological condition of aquatic resources at regional and b...
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SUSPENDED AND BENTHIC SEDIMENT RELATIONSHIPS IN THE YAQUINA ESTUARY, OREGON: NUTRIENT PROCESSING |
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Measurements of nutrient loading and subsequent nutrient processing are fundamental for determining biogeochemical processes in rivers and estuaries. In Oregon coastal watersheds...
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SUSTAIN - A BMP PROCESS AND PLACEMENT TOOL FOR URBAN WATERSHEDS |
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Watershed and stormwater managers need modeling tools to evaluate how best to address environmental quality restoration and protection needs in urban and developing areas. Signifi...
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SUSTAIN - A BMP PROCESS AND PLACEMENT TOOL FOR URBAN WATERSHEDS |
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Watershed and stormwater managers need modeling tools to evaluate how best to address environmental quality restoration and protection needs in urban and developing areas. Signific...
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SUSTAIN - A USEPA BMP PROCESS AND PLACEMENT TOOL FOR URBAN WATERSHEDS |
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Watershed and stormwater managers need modeling tools to evaluate how best to address environmental quality restoration and protection needs in urban and developing areas. Signific...
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SUSTAIN - AN EPA BMP PROCESS AND PLACEMENT TOOL FOR URBAN WATERSHEDS |
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To assist stormwater management professionals in planning for implementation of best management practices (BMPs), efforts have been under way by the U.S. Environmental Protection A...
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SUSTAINABLE SOLUTIONS FOR RESTORING DEGRADED WATERSHEDS AND RIPARIAN ECOSYSTEMS: IMPLEMENTATION, EVALUATION, AND AMELIORATION |
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The objective of the Office of Research and Development (ORD) ecosystem restoration research strategy is to evaluate the effectiveness of restoration and management practices for a...
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SWALE RESEARCH AT NRMRL’S URBAN WATERSHED RESEARCH FACILITY |
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Swales are “engineered ditches” that provide stable routing for stormwater runoff. Swales are green infrastructure, a low-cost drainage option for highways, farms, industrial, and...
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SWREGAP DATA TO ESTIMATE CHANGE IN WATERSHED CONDITION FOR SELECTED NEVADA WATERSHEDS USING A GIS-BASED HYDROLOGIC MODELING APPROACH |
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Planning and assessment in land and water resource management are an important contemporary requisite for almost all natural resource agencies. An overview of the utility of SWReG...
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Sedimentation History Of Halfway Creek Marsh, Upper Mississippi River National Wildlife And Fish Refuge, Wisconsin, 1846-2006. Scientific Investigations Report 2007–5209 |
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The history of overbank sedimentation in the vicinity of Halfway Creek Marsh near La Crosse, Wisconsin, was examined during 2005-06 by the U.S. Geological Survey and University of ...
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Seeking More Effective Management of Freshwater Pollution |
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The atmosphere contains airborne pollutants such as mercury, nitrogen
oxides, and sulfur oxides released from automobiles, factories, and power plants. Similarly, land surfaces su...
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Simple Approaches for Measuring Dry Atmospheric Nitrogen Deposition to Watersheds |
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Assessing the effects of atmospheric nitrogen (N) deposition on surface water quality requires accurate accounts of total N deposition (wet, dry, and cloud vapor); however, dry dep...
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Simulating Runoff from a Grid Based Mercury Model: Flow Comparisons |
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Several mercury cycling models, including general mass balance approaches, mixed-batch reactors in streams or lakes, or regional process-based models, exist to assess the ecologica...
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Southwest Region Threatened, Endangered, and At-Risk Species Workshop: Managing Within Highly Variable Environments Hydrology and Ecology of Intermittent Stream and Dry Wash Ecosystems |
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Ephemeral (dry washes) and intermittent streams make up approximately 59% of all streams in the U.S. (excluding Alaska), and over 81% in the arid and semi-arid Southwest (Arizona, ...
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Stochastic Residual-Error Analysis For Estimating Hydrologic Model Predictive Uncertainty |
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A hybrid time series-nonparametric sampling approach, referred to herein as semiparametric, is presented for the estimation of model predictive uncertainty. The methodology is a tw...
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Stormwater Retention Ponds and Constructed Wetlands Research at NRMRL’s Urban Watershed Research Facility |
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Microorganisms are priority stressors to receiving water bodies. Practitioners often consider structural stormwater management practices as effective tools to mitigate stormwater-...
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TERRESTRIAL AND IN-LAKE CONTRIBUTIONS TO ALKALINITY BUDGETS OF DRAINAGE LAKES: AN ASSESSMENT OF REGIONAL DIFFERENCES |
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Using two independent procedures, we estimate relative contributions of in-lake alkalinity budgets for drainage lakes in selected regions of the Eastern United States. The first me...
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TERRESTRIAL AND MARINE SOURCES OF NUTRIENTS TO AN OREGON COASTAL RIVER |
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In the Pacific Northwest of North America, anadromous fish can transport significant quantities of nutrients and energy from the ocean to the watersheds where they return, reproduc...
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TERRESTRIAL AND MARINE SOURCES OF NUTRIENTS TO STREAMS IN THE OREGON COAST RANGE |
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Research on nutrient delivery to Pacific Northwest streams generally focuses on watershed processes and land use, but anadromous fish also can serve as a significant source of nutr...
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TERRESTRIAL ECOSYSTEM STUDIES AT THE WESTERN ECOLOGY DIVISION - A SERIES OF MODELS FOR MANAGEMENT OF WATER, NUTRIENTS AND CHEMICALS AT WATERSHED SCALES |
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Project description for Terrestrial Ecosystem Studies at WED...
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TERRESTRIAL VEGETATION GREENNESS OF THE LOWER GALVESTON BAY WATERSHED FROM SATELLITE REMOTE SENSING AND ITS RELATION TO WATER AND THE SALINITY REGIME OF THE GALVESTON BAY ESTUARY |
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Spatial and temporal variability of vegetation greenness have been determined for coastal Texas using biweekly Normalized Difference Vegetation Index (NDVI) data derived from the A...
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TESTING LINKAGES BETWEEN GROUNDWATER, WATERSHED, AND IN-STREAM MODELS IN THE CONTENTNEA CREEK BASIN, NORTH CAROLINA, USA |
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Computer modeling provides support for the development of TMDLs (total maximum daily loads) of impaired water bodies. Evaluations of TMDLs for nutrients, especially for nitrogen, b...
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THE ABCS OF SNOWMELT: A TOPOGRAPHICALLY FACTORIZED ENERGY COMPONENT SNOWMELT MODEL. (R824784) |
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Because of the crucial role snowmelt plays in many watersheds around the world, it is important to understand and accurately quantify the melt process. As such, numerous mathematic...
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THE AC/TC BACTERIAL RATIO: A TOOL FOR WATERSHED QUALITY MANAGEMENT. (R829784) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE ASSOCIATION OF LAND USE/LAND COVER AND NUTRIENT LEVELS IN MARYLAND STREAMS |
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Anthropogenic nonpoint sources of nutrients are known to cause accelerated eutrophication of estuaries. The Chesapeake Bay is one of the world's largest estuaries exhibiting the eu...
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THE AUTOMATED GEOSPATIAL WATERSHED ASSESSMENT TOOL |
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A toolkit for distributed hydrologic modeling at multiple scales using a geographic information system is presented. This open-source, freely available software was developed thro...
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THE BEAR BROOK WATERSHED IN MAINE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE BEAR BROOK WATERSHED MANIPULATION PROJECT: WATERSHED SCIENCE IN A POLICY PERSPECTIVE |
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The Bear Brook Watershed Manipulation in Maine is a paired watershed experiment. Monitoring of the paired catchments (East Bear Brook - reference; West Bear Brook - experimental) b...
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THE BEAR BROOK WATERSHED MANIPULATION PROJECT: WATERSHED SCIENCE IN A POLICY PERSPECTIVE. (R825762) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE BEST LANDSCAPE PREDICTORS OF WATER QUALITY DEPEND ON WATERSHED SIZE. (R828784) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE CHANGING WATERSHED: A 25-YEAR HISTORY OF LAND COVER CHANGE IN THE SAN PEDRO RIVER |
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Vegetation change in the American West has been a subject of concern throughout this century. Although many of the changes have been recorded qualitatively through the use of compa...
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THE CHANGING WATERSHED: A 25-YEAR HISTORY OF LAND COVER CHANGE IN THE SAN PEDRO RIVER, AN AMERICAN SEMI-ARID BIOREGION |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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THE CHANGING WATERSHED: USING A 25 YEAR HISTORY OF LANDSCAPE CHANGE AS A GUIDE TO THE FUTURE |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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THE COMPARISON OF TWO WATERSHEDS USING A WATERSHED NUTRIENT LOADING MODEL |
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Monitoring data, collected from the Yaquina River, Oregon, from 1999 through 2002 were used as the basis for developing the nutrient flux model as part of a larger agency program f...
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THE COMPLICATIONS OF MONITORING TREATMENT BMPS |
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The use of best management practices (BMPs) in an urban watershed can provide pollutant load reductions at a relatively low cost. BMPs can range from being management operations (...
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THE COMPLICATIONS OF MONITORING TREATMENT BMPS. |
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The use of best management practices (BMPs) in an urban watershed can provide pollutant load reductions at a relatively low cost. BMPs can range from being management operations (...
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THE CONSEQUENCES OF LANDSCAPE CHANGE ON ECOLOGICAL RESOURCES: AN ASSESSMENT OF THE UNITED STATES MID-ATLANTIC REGION |
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Spatially explicit identification of changes in ecological conditions over large areas is key to targeting and prioritizing areas for environmental protection and restorati...
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THE CONTROL OF NITRATE AS A WATER POLLUTANT |
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This study was based on the premise that the most logical approach to reducing nitrate leaching in soils was to limit the amount of nitrate in the soil solution at any one time. Me...
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THE DILEMMA OF WATERSHED MANAGEMENT: FINE SCALE DECISIONMAKING IN A COARSE SCALE WORLD. (R825290) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE ECOLOGICAL EFFECTIVENESS OF PONDS AND WETLANDS AS "BEST MANAGEMENT PRACTICES (BMPS)" FOR STREAMS IN DEVELOPING LANDSCAPES |
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Ponds and constructed wetlands, also referred to as detention/retention basins, have a long history as best management practices (BMPs) used to mitigate the impacts of stormwater r...
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THE EFFECT OF NITROGEN OVER-ENRICHMENT ON SOME PLANT-SOIL RELATIONSHIPS AND MICROBIAL PROCESSES |
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Salt marshes of similar geomorphology and hydrology with varying watershed nitrogen loads were examined for differences in plant structure, soil characteristics, and
denitrifica...
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THE EFFECT OF VARIABLE PCO2 ON CATION SUPPLY AND SURFACE WATER ALKALINITY |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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THE EFFECTS OF DECREASED NUTRIENT LOADING ON THE LIMNOLOGY OF DIAMOND LAKE, OREGON |
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Responding to accelerated recreational pressure at Diamond Lake, Oregon, in 1969 the U.S. Forest Service began installation of a wastewater diversion system which would eventually ...
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THE EFFECTS OF DECREASED NUTRIENT LOADING ON THE LIMNOLOGY OF DIAMOND LAKE, OREGON. APPENDIX |
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Responding to accelerated recreational pressure at Diamond Lake, Oregon, in 1969 the U.S. Forest Service began installation of a wastewater diversion system which would eventually ...
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THE EFFECTS OF DIFFERENT SAMPLE CONCENTRATIONS ON THE STRUCTURE OF MICROBIAL COMMUNITIES USING PHOSPHOLIPID FATTY ACID ANALYSIS |
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Phospholipid fatty acid (PLFA) analysis is a powerful tool for determination of microbial community structures in soils and sediments. However, accurate determination of total mic...
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THE EFFECTS OF ECOSYSTEM RESTORATION ON NITROGEN PROCESSING IN AN URBAN MID-ATLANTIC PIEDMONT STREAM |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. The US Environmental Protection Agency, US Geological Survey, Institute of Ecosystem Studies,...
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THE EFFECTS OF ECOSYSTEM RESTORATION ON NITROGEN PROCESSING IN AN URBAN MID-ATLANTIC PIEDMONT STREAM |
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Elevated nitrate levels in streams and groundwater pose human and ecological threats. The US EPA, USGS, Institute of Ecosystem Studies, and Baltimore County Dept. of Environmental...
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THE EFFECTS OF LAND-USE/LAND-COVER, STREAM FLOW, AND INTER-ANNUAL CLIMATE ON THE MAGNITUDE AND TIMING OF N, P,, AND OC CONCENTRATIONS IN COASTAL PLAN WATERSHEDS |
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In-stream nitrogen, phosphorus, organic carbon, and suspended sediment concentrations were measured in 18 sub-basins over two annual cycles to assess how land-use/land-cover (LULC)...
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THE EFFECTS OF URBAN IMPERVIOUS WATERSHED COVER ON BENTHIC MACROINVERTEBRATE POPULATIONS IN STREAMS WITH PARTICULAR REFERENCE TO DISTURBANCE FROM STORM EVENT FREQUENCY AND MAGNITUDE. (R825792) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE EMERGING USE OF LIDAR AS A TOOL FOR ASSESSING WATERSHED MORPHOLOGY |
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Stream channel morphology is an integral component of the stream fluvial process and is inherently related to the stability of stream aquatic ecology. Numerous studies have shown t...
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THE ENVIRONMENTAL PROTECTION AGENCY'S WATERSHED MANAGEMENT RESEARCH PROGRAM: AN OVERVIEW |
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The Environmental Protection Agency (EPA) has directed much attention to watersheds and water quality during its tenure as the United States Federal Agency charged with protection ...
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THE HERMAN PIT AND ITS ROLE IN MERCURY TRANSPORT AT THE SULPHUR BANK MERCURY MINE SUPERFUND SITE, CLEAR LAKE, CALIFORNIA |
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The Sulphur Bank Mercury Mine (SBMM) is an abandoned sulphur and cinnabar mine located on the eastern shore of the Oaks Arm of Clear Lake, Lake County, California. SBMM was one of...
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THE INFLUENCE OF CATCHMENT LAND USE ON HYDROGRAPH DYNAMICS AND IMPLICATIONS FOR STREAM BIOLOGICAL ASSEMBLAGES |
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Catchment land use impacts the rise and fall dynamic of hydrographs, and may also help explain variation in biological assemblages known to be sensitive to flow regime. We collect...
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THE INFLUENCE OF FOREST FRAGMENTATION AND OTHER ENVIRONMENTAL FACTORS ON LAKE SUPERIOR STREAM FISH ASSEMBLAGE |
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As part of a comparative watershed project investigating land cover/land use disturbance gradients for streams in the western Lake Superior region, we wanted to determine the relat...
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THE INFLUENCE OF FOREST FRAGMENTATION AND OTHER ENVIRONMENTAL FACTORS ON LAKE SUPERIOR STREAM FISH ASSEMBLAGES |
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As part of a comparative watershed project investigation land cover/land use disturbance gradients for streams in the western Lake Superior region, we wanted to determine the relat...
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THE INFLUENCE OF SUBURBAN LAND USE ON HABITAT AND BIOTIC INTEGRITY OF COASTAL RHODE ISLAND STREAMS |
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Watershed land use in suburban areas can affect stream biota through degradation of instream habitat, water quality, and riparian vegetation. By monitoring stream biotic communitie...
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THE INFLUENCE OF THE SPATIAL DISTRIBUTION OF SNOW ON BASIN-AVERAGED SNOWMELT. (R824784) |
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Spatial variability in snow accumulation and melt owing to topographic effects on solar radiation, snow drifting, air temperature and precipitation is important in determining the ...
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THE LAKE MICHIGAN MASS BALANCE PROJECT: QUALITY ASSURANCE PLAN FOR MATHEMATICAL MODELLING |
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This report documents the quality assurance process for the development and application of the Lake Michigan Mass Balance Models. The scope includes the overall modeling framework ...
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THE LANDSCAPE PERSPECTIVE IN MITIGATING THE IMPACTS OF WETLAND HABITAT LOSS |
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Ecological restoration is viewed as a way to mitigate the effects of land uses and, potentially, global change. Research to date has primarily focused on the scale of the individu...
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THE MAGIC SIMULATION OF SURFACE WATER ACIDIFICATION AT, AND FIRST YEAR RESULTS FROM, BEAR BROOK WATERSHED MANIPULATION, MAINE, USA |
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The catchments of East and West Bear Brooks, Maine, USA, with similar stream chemistries and hydrographs, have been hydrologically and chemically monitored for 3.5 years. hese clea...
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THE MISUSE OF HYDROLOGIC UNIT MAPS FOR EXTRAPOLATION, REPORTING, AND ECOSYSTEM MANAGEMENT |
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The use of watersheds to conduct research on land-water relationships has expanded recently to include both extrapolation and reporting of water resource information and ecosystem ...
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THE MOST DILUTE LAKE IN THE WORLD? |
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Lake Notasha, near the crest of the Oregon Cascade mountain range, is the most dilute lake known. he measured conductivity during two visits was 1.3 and 1.6 uS cm-1, with a sum of ...
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THE NEXT STEP - INCORPORATING DIFFUSE POLLUTION ABATEMENT INTO WATERSHED MANAGEMENT. (R830885) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE PACIFIC COAST ESTUARINE INFORMATION SYSTEM: CREATING A BASELINE FOR THE FUTURE |
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Coastal researchers and managers have a growing need for ready access to a diversity of
data types, including estuarine-specific lists of native and nonindigenous species and es...
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THE RELATED ROLE OF ENVIRONMENTAL MODELING FRAMEWORKS |
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In recent years the assessment of environmental systems for the purpose of regulatory decision making has expanded considerably from a medium-specific focus to a comprehensive asse...
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THE RELATIONSHIP BETWEEN STREAM CHEMISTRY AND WATERSHED LAND COVER DATA IN THE MID-ATLANTIC REGION, U.S. |
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In order to investigate the relationship between stream chemistry and watershed land cover at the regional scale, we analyzed data from 368 wadeable streams sampled in the mid-Atla...
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THE RELATIONSHIP BETWEEN TEMPERATURE, PHYSICAL HABITAT AND FISH ASSEMBLAGE DATA IN A STATE WIDE PROBABILITY SURVEY OF OREGON STREAMS |
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To assess the ecological condition of streams and rivers in Oregon, we sampled 146 sites
in summer, 1997 as part of the U.S. EPA's Environmental Monitoring and Assessment Progra...
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THE RELATIVE INFLUENCE OF REGIONAL, WATERSHED, AND SITE-SPECIFIC ENVIRONMENTAL FACTORS ON STREAM FISH ASSEMBLAGES IN THE LAKE SUPERIOR BASIN |
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As part of a comparative watershed project investigating land cover/land use disturbance gradients for low order streams in the western Lake Superior region, we set out to determin...
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THE REPORTED EFFECTIVENESS OF COMMONLY USED BEST MANAGEMENT PRACTICES FOR THE CONTROL OF NUTRIENTS IN URBAN STORMWATER |
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Many structural BMPs, when appropriately designed and constructed, capture and treat urban runoff to remove particulate-associated pollutants. However, field monitoring programs s...
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THE ROLE OF GIS IN SELECTING SITES FOR RIPARIAN RESTORATION BASED ON HYDROLOGY AND LAND USE |
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Successful long-term wetland restoration efforts require consideration of hydrology and surrounding land use during the site selection process. This article describes an approach t...
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THE ROLE OF STORMWATER BMP'S IN MITIGATING THE EFFECTS OF NUTRIENT OVERENRICHMENT IN THE URBAN WATERSHED |
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Nutrient overenrichment from agricultural and urban nonpoint and diffuse sources, including urban stormwater, is a leading cause of impairment to our nation's rivers, lakes, and co...
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THE ROLE OF STORMWATER BMPS IN MITIGATING THE EFFECTS OF NUTRIENT OVERENRICHMENT IN THE URBAN WATERSHED |
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Nutrient overenrichment from agricultural and urban point and nonpoint sources, including urban stormwter, is a leading cause of impairment to our nation's rivers, lakes, and coast...
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THE ROLE OF STORMWATER BMPS IN MITIGATING THE EFFECTS OF NUTRIENT OVERENRICHMENT IN THE URBAN WATERSHED |
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Nutrient overenrichment from agricultural and urban nonpoint and diffuse sources, including urban stormwater, is a leading cause of impairment to our nation's rivers, lakes, and co...
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THE ROLE OF STORMWATER RESEARCH IN BMP DESIGN - PATHOGENS AND REGULATORY DEMANDS |
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The U.S. Environmental Protection Agency strives to protect human health, ensure the safety of drinking and recreational waters, support economic and recreational activities, and p...
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THE ROLE OF STORMWATER RESEARCH IN BMP DESIGN - PATHOGENS AND REGULATORY DEMANDS |
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The U.S. Environmental Protection Agency strives to protect human health, ensure the safety of drinking and recreational waters, support economic and recreational activities, and p...
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THE ROLE OF WATERSHED CLASSIFICATION IN DIAGNOSING CAUSES OF BIOLOGICAL IMPAIRMENT |
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We compared classification schemes based on watershed storage (wetland + lake area/watershed area) and forest fragmention with a gewographically-based classification scheme for two...
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THE ROLE OF WATERSHED CLASSIFICATION IN DIAGNOSING CAUSES OF BIOLOGICAL IMPAIRMENT: PRESENTATION |
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Summary of this PowerPoint presentation is exactly what the title states. The role of watershed classification in diagnosing causes of biological impairment....
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THE ROLES OF ANTHROPOGENIC WATERSHED LOADING AND CLIMATE VARIABILITY ON NITROGEN FLUXES TO THE POTOMAC RIVER ESTUARY |
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To better anticipate responses of estuaries and coastal ecosystems to human activity and climate variation, it is useful to examine the historical record of nitrogen fluxes from wa...
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THE SAN PEDRO RIVER SPATIAL DATA ARCHIVE, A DATABASE BROWSER FOR COMMUNITY-BASED ENVIRONMENTAL PROTECTION |
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It is currently possible to measure landscape change over large areas and determine trends in ecological and hydrological condition using advanced space-based technologies accompan...
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THE SAN PEDRO RIVER, AN EXAMPLE OF AN INTEGRATED SYSTEM FOR TRANSBORDER ENVIRONMENTAL MANAGEMENT USING GEOSPATIAL DATA AND PROCESS MODELS |
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These technologies provide the basis for developing landscape compostion and pattern indicators as sensitive measures of large-scale environmental change and thus may provide an ef...
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THE SAN PEDRO RIVER: A CASE STUDY FOR EXAMINING PAST LANDSCAPE CHANGE AND FORECASTING HYDROLOGICAL AND BIOLOGICAL RESPONSE TO URBAN GROWTH AND LAND USE CHANGE |
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It is currently possible to measure landscape change over large areas and determine trends in
environmental condition using advanced space-based technologies accompanied by ...
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THE SAN PEDRO SPATIAL DATA ARCHIVE, A DATABASE BROWSER FOR COMMUNITY-BASED ENVIRONMENTAL PROTECTION |
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It is currently possible to measure landscape change over large areas and determine trends in ecological and hydrological condition using advanced space-based technologies accompan...
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THE SOUTHWEST REGIONAL GAP PROJECT: A DATABASE MODEL FOR REGIONAL LANDSCAPE ASSESSMENT, RESOURCE PLANNING, AND VULNERABILITY ANALYSIS |
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The Gap Analysis Program (GAP) is a national interagency program that maps the distribution of plant communities and selected animal species and compares these distributions with l...
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THE STORM WATER MANAGEMENT MODEL (SWMM) AND RELATED WATERSHED TOOLS DEVELOPMENT |
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The Storm Water Management Model (SWMM) is a dynamic rainfall-runoff simulation model used for single event or long-term (continuous) simulation of runoff quantity and quality from...
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THE US EPA'S REGIONAL VULNERABILITY ASSESSMENT PROGRAM: A RESEARCH STRATEGY FOR 2001-2006 |
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The goal of ORD's Regional Vulnerability Assessment (ReVA) Program is to develop all
approach to quantifying regional ecological vulnerabilities so that risk management activit...
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THE USE OF MICROBIAL INDICATORS FOR MONITORING STREAM SANITARY AND ECOLOGICAL CONDITION |
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We measured traditional public health indicators of sanitary condition, including heterotrophic plate counts, total coliforms, fecal coliforms, and E. coli using membrane filtratio...
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THE USE OF MODIS NDVI DATA FOR CHARACTERIZING CROPLAND ACROSS THE GREAT LAKES BASIN |
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The Moderate Resolution Imaging Spectroradiometer (MODIS) provides new opportunities for characterizing land-cover (LC) to support monitoring and assessment studies at watershed, r...
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THE USE OF NTM DATA FOR THE ACCURACY ASSESSMENT OF LANDSAT DERIVED LAND USE/LAND COVER MAPS |
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National Technical Means (NTM) data were utilized to validate the accuracy of a series of LANDSAT derived Land Use / Land Cover (LU/LC) maps for the time frames mid- I 970s, early-...
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THE USE OF SCENARIO ANALYSIS TO ASSESS FUTURE LANDSCAPE CHANGE ON WATERSHED CONDITION IN THE PACIFIC NORTHWEST (USA) |
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The traditional definition of security has been broadened to include environmental threats resulting from resource degradation and scarcity related to anthropogenic development. Th...
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THE USE OF SCENARIO ANALYSIS TO ASSESS LANDSCAPE CHANGE ON WATERSHED CONDITION IN THE PACKIFIC NORTHWEST (USA) |
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The ability to assess, report, and forecast the life support functions of ecosystems is absolutely critical to our capacity to make informed decisions which will maintain the susta...
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THE UTILITY OF A NOVEL BACTERIAL RATIO FOR WATERSHED MANAGEMENT: A CASE STUDY. (R829784) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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THE WATER BALANCE OF THE SUSQUEHANNA RIVER BASIN AND ITS RESPONSE TO CLIMATE CHANGE. (R824995) |
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AbstractHistorical precipitation, temperature and streamflow data for the Susquehanna River Basin (SRB) are analyzed with the objective of developing simple statistical...
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THE WATERSHED DEPOSITION TOOL: A MEANS TO LINK ATMOSPHERIC DEPOSITION TO WATERSHEDS |
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The potential for atmospheric deposition reductions to contribute to water quality management is not being included in many planning exercises. This is because often the water qual...
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THE WESTERN LAKE SUPERIOR COMPARATIVE WATERSHED FRAMEWORK: A FIELD TEST OF GEOGRAPHICALLY-DEPENDENT VS. THRESHOLD-BASED GEOGRAPHICALLY-INDEPENDENT CLASSIFICATION |
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Stratified random selection of watersheds allowed us to compare geographically-independent classification schemes based on watershed storage (wetland + lake area/watershed area) an...
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THE WESTERN LAKE SUPERIOR COMPARATIVE WATERSHED FRAMEWORK: A FIELD TEST OF GEOGRAPHICALLY-DEPENDENT VS. THRESHOLD-BASED GEOGRAPHICALLY-INDEPENDENT CLASSIFICATION SCHEMES |
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Main and interactive effects of watershed storage and forest fragmentation on watershed exports, habitat quality, community composition and food-web relationships were compared wit...
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THREE-DIMENSIONAL MODELING OF COHESIVE SEDIMENT TRANSPORT IN A PARTIALLY STRATIFIED MICRO-TIDAL ESTUARY TO ASSESS EFFECTIVENESS OF SEDIMENT TRAPS |
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The three-dimensional (3D) finite difference model Environmental Fluid Dynamics Code (EFDC) was used to simulate the hydrodynamics and sediment transport in a partially stratified ...
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TIOGA RIVER MINE DRAINAGE ABATEMENT PROJECT |
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The Tioga River Demonstration Project in southeastern Tioga County, Pennsylvania, is essentially defined by an isolated pocket of coal that has been extensively deep and strip mine...
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TMDL MODEL EVALUATION AND RESEARCH NEEDS |
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This review examines the modeling research needs to support environmental decision-making for the 303(d) requirements for development of total maximum daily loads (TMDLs) and relat...
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TMDLS: AFTER POINT SOURCES, WHAT CAN WE DO NEXT? |
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Section 303(d) of the Clean Water Act required TMDLs (total maximum daily loads) for all waters for which effluent or point source limitations are insufficient to meet water qualit...
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TOWARD CLASSIFICATION AND RATIONALE FOR WATERSHED MANAGEMENT AND STREAM PROTECTION |
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Classification can be used for increased understanding of systems and for improved relations of people with their environments. This report offers a rationale for developing such a...
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TOWARD EFFECTIVE URBAN BMPS FOR STORMWATER TREATMENT: WET PONDS VS. CONSTRUCTED WETLAND-TYPE RETENTION/DETENTION STRUCTURES |
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A goal of the Urban Watershed Management Branch of USEPA's NRMRL, Edison, NJ is to develop and demonstrate technologies and methods to manage the ecological risks posed by stormwat...
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TOWARDS AN AUTOMATED TOOL FOR CHANNEL-NETWORK CHARACTERIZATIONS, MODELING, AND ASSESSMENT |
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Detailed characterization of channel networks for hydrologic and geomorphic models has traditionally been a difficult and expensive proposition, and lack of information has thus be...
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TOWARDS AN INDEX OF AQUATIC VERTEBRATE ASSEMBLAGE INTEGRITY FOR STREAMS AND RIVERS IN OREGON AND WASHINGTON |
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This research expands upon earlier Indices of Biotic Integrity (IBI) efforts that have been developed for the Northwest including the Willamette Valley IBI and the Coast Range cold...
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TOXIC POLLUTANTS IN URBAN WET-WEATHER FLOWS: AN OVERVIEW OF THE MULTI-MEDIA TRANSPORT, IMPACTS, AND CONTROL MEASURES |
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This paper presents an overview of the transport of toxic pollutants through multiple media and drainage systems in the urban watershed during wet-weather periods. It includes the ...
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TRACE ANALYSIS FOR AROMATIC HYDROCARBONS IN NATURAL WATERS |
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A method of trace analysis of volatile aromatic hydrocarbons in natural water is described. The method is based on sparging water samples with nitrogen, adsorption of hydrocarbons ...
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TRACE GAS CONCENTRATIONS IN SMALL STREAMS OF THE GEORGIA PIEDMONT |
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Seventeen headwater watersheds within the SFBR watershed ranging from 0.5 to 3.4 km2 were selected. We have been monitoring concentrations of the trace gases nitrous oxide, methane...
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TRACE GAS CONCENTRATIONS IN STREAMS - EARLY WARNING INDICATORS OF STREAM IMPAIRMENT? |
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Surface water contamination and resultant impairment of aquatic ecosystem functioning are serious environmental problems, caused in large part by land use changes and excess organi...
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TRACE METAL LOADING ON WATERBORNE SOIL AND DUST PARTICLES CHARACTERIZED THROUGH THE USE OF SPLIT-FLOW THIN CELL FRACTIONATION |
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The fate and transport of metallic pollutants through a watershed are related to the characteristics of undissolved solid particles to which they are bound. Removal of these partic...
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TRACKING FECAL CONTAMINATION WITH BACTEROIDALES MOLECULAR MARKERS: AN ANALYSIS OF THE DYNAMICS OF FECAL CONTAMINATION IN THE TILLAMOOK BASIN, OREGON |
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Although amplification of source-specific molecular markers from Bacteroidales fecal bacteria can identify several different kinds of fecal contamination in water, it remains uncle...
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TRADABLE CREDITS FOR STORM WATER VOLUME: AN ALTERNATIVE APPROACH FOR SUSTAINABLE URBAN WATERSHED MANAGEMENT |
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The increased storm water runoff rate and volume caused by urbanization, and their detrimental effects on stream habitat and morphology, is well documented. In most cases, current ...
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TRADING ALLOWANCES FOR STORMWATER CONTROL: HYDROLOGY AND OPPORTUNITY COSTS |
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Excess stormwater runoff is a serious problem in a large number of urban areas, causing flooding, water pollution, groundwater recharge deficits and ecological damage to urban ...
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TRANSPORT, AIR-SURFACE EXCHANGE AND LANDSCAPE ACCUMULATION OF AIRBORNE POLLUTANTS DEPOSITED ONTO RURAL CATCHMENTS: THE CASE OF MERCURY |
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This paper presents a modeling analysis of airborne mercury fate in rural catchments by coupling components of simulation models developed and published previously by the authors. ...
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TREATMENT OF HEAVY METALS IN STORMWATER RUNOFF USING RETENTION PONDS AND CONSTRUCTED WETLANDS |
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Urban stormwater runoff is a significant source of suspended sediments and associated contaminants, including heavy metals, to receiving waterways. These metals are either dissolv...
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TREATMENT OF HEAVY METALS IN STORMWATER USING WET POND AND WETLAND MESOCOSMS |
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Urban stormwater runoff is a significant source of suspended sediments and associated contaminants, including heavy metals, to receiving waterways. These metals are either dissolv...
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TREND ANALYSIS OF WATER QUALITY MONITORING DATA FOR COBB COUNTY, GEORGIA |
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The Cobb County Water Protection Division Water Quality Laboratory has conducted quarterly chemical monitoring from 1995-2005. Here we analyze these data for temporal trends in 20...
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TREND ANALYSIS OF WATER QUALITY MONITORING DATA FOR COBB COUNTY, GEORGIA |
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The Cobb County Water Protection Division Water Quality Laboratory has conducted quarterly chemical monitoring from 1995-2005. Here we analyze these data for temporal trends at 45 ...
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TRENDS AND PATTERNS IN LAKE ACIDIFICATION IN THE STATE OF VERMONT: EVIDENCE FROM THE LONG-TERM MONITORING PROJECT |
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Twenty-four low acid neutralizing capacity (ANC lakes in Vermont have been monitored since 1980 to characterize their chemical variability and to determine if they exhibit temporal...
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TWO-STAGE SAMPLING FOR RARE RESOURCES: SAMPLING WETLANDS IN THE JUNIATA WATERSHED OF PENNSYLVANIA |
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The National Wetland Inventory (NWI) is the most complete catalog of wetland location, type, and extent that is presently available. As such, it is the default frame for developing...
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The Experimental Stream Facility, Clermont County, Ohio |
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A watershed is the natural land area that drains into a common waterway, such as a stream, lake, estuary, wetland, aquifer, or even the ocean. Watersheds are important—they supply ...
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The Response of Fish Habitat to Environmental Flows in the Albemarle-Pamlico Watershed |
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The provision of habitat for fish is an important service provided by rivers. Future land development and climate change will likely alter several aspects of habitat, including flo...
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The Role of Ecological Endpoints in Watershed Management |
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Landscape change and pollution in watersheds affect ecological endpoints in receiving water bodies. Therefore, these endpoints are useful in watershed management. Fish and benthic ...
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The Urban Watershed Research Facility, Edison, New Jersey |
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In an undeveloped and undisturbed environment, rainfall is naturally filtered and absorbed by soil and plants, protecting aquatic systems by slowly releasing the water to ground wa...
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U.S. ENVIRONMENTAL PROTECTION AGENCY RESEARCH AND TECHNICAL SUPPORT NEEDS RELATED TO CONCEPTUAL MODEL DEVELOPMENT FOR SUBSURFACE REACTIVE TRANSPORT MODELING OF INORGANIC CONTAMINANTS, RADIONUCLIDES, AND NUTRIENTS |
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EPA's Office of Research and Development is responsible to EPA's Office of Solid Waste to provide research and technical support for waste site closures and the development of tech...
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U.S. ENVIRONMENTAL PROTECTION AGENCY'S ECOLOGICAL RESEARCH STRATEGY |
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EPA's Office of Research and Development (ORD) has recently released a research strategy to guide its program to improve ecosystem risk assessment and risk management, which is one...
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U.S. EPA RESEARCH ON URBAN WATERSHED MANAGEMENT TECHNOLOGIES |
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The U.S. EPA's Urban Watershed Management Branch is responsible for developing and demonstrating technologies and methods required to manage risks to public health, property and th...
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U.S. EPA'S URBAN WATERSHED RESEARCH PROGRAM IN BMPS AND RESTORATION FOR WATER QUALITY MANAGEMENT |
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The U.S. EPA's Urban Watershed Management Branch is responsible for developing and demonstrating technologies and methods required managing the risk to public health, property and ...
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U.S. EPA's Watershed Management Research Activities |
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Watershed and stormwater managers need modeling tools to evaluate alternative plans for environmental quality restoration and protection needs in urban and developing areas. A wate...
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UNCERTAINTY ANALYSIS OF RUNOFF ESTIMATES FROM A RUNOFF CONTOUR MAP |
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The US EPA in cooperation with the USGS conducted an analysis to quantify the uncertainty associated with interpolatinq runoff to specific sites using a runoff contour map. e inter...
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UNCERTAINTY AND SENSITIVITY ANALYSIS OF RUNOFF AND SEDIMENT YIELD IN A SMALL AGRICULTURAL WATERSHED WITH KINEROS2 |
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Using the Monte Carlo (MC) method, this paper derives arithmetic and geometric means and associated variances of the net capillary drive parameter, G, that appears in the ...
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UNDERSTANDING ECOLOGICAL RISK IN RURAL WATERSHEDS THROUGH MEASURMENTS OF STREAM COMMUNITY METABOLISM, NUTRIENT AND SEDIMENT DYNAMICS |
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The goal of this project, and associated research, is to establish thresholds for ecological response to watershed disturbance and to develop tools and insights that will help us m...
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UNDERSTANDING THE HYDROLOGIC BEHAVIOR OF A SMALL SEMI-ARID MOUNTAINOUS WATERSHED. (R824784) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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UNDERSTANDING THE RELATIONSHIPS AMONG WATERSHEDS, STREAMS, AND RECEIVING COASTAL ECOSYSTEM |
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The U.S. Environmental Protection Agency has developed the biocriteria program to incorporate biological indicators as part of state water-quality standards. Biological data have b...
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UPDATE ON EPA'S URBAN WATERSHED MANAGEMENT BRANCH MODELING ACTIVITIES |
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Environmental Protection Agency (EPA's) Office of Research and Development (ORD) Urban Watershed Management Branch (UWMB) has identified an approach for urban modeling research t...
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UPDATE ON EPA'S URBAN WATERSHED MANAGEMENT BRANCH MODELING ACTIVITIES |
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This paper provides the Stormwater Management Model (SWMM) user community with a description of the Environmental Protection Agency (EPA's) Office of Research and Development (ORD)...
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UPDATE ON THE MARINA STUDY ON LAKE TEXOMA |
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The National Risk Management Research Laboratory (NRMRL) has instituted a program for Risk Management Research for Ecosystem Restoration in Watersheds. As part of this program a l...
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UPTAKE OF PLANAR POLYCHLORINATED BIPHENYLS AND 2,3,7,8-SUBSTITUTED POLYCHLORINATED DIBENZOFURANS AND DIBENZO-P-DIOXINS BY BIRDS NESTING IN THE LOWER FOX RIVER AND GREEN BAY, WI, USA |
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The uptake of persistent polychlorinated hydrocarbons (PCHs) by four avian species was investigated at upper trophic levels of two aquatic food chains of the lower Fox River and Gr...
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URBAN RUNOFF QUALITY MANAGEMENT (BOOK REVIEW) |
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This manual of practice is geared toward a technical audience but the first four chapters can be understood by anyone interested in stormwater issues and the use of best management...
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URBAN RUNOFF TREATMENT METHODS. VOLUME I. NON-STRUCTURAL WETLANDS TREATMENT |
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A major concern of the Minnehaha Creek Watershed District, a natural watershed basin encompassing the area that drains into the Lake Minnetonka - Minnehaha Creek system, near Wayza...
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URBAN STORMWATER BEST MANAGEMENT PRACTICE (BMP) RESEARCH |
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Presentation on urban best management practice research conducted by the Urban Watershed Research Branch. The presentation to Region 3 started with Branch history, discussed result...
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URBAN STORMWATER TRACING WITH THE NATURALLY OCCURRING DEUTERIUM ISOTOPE |
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Measurements of the naturally-occurring deuterium isotope assist the tracing of water components during wet-weather flows in an urban watershed. A transect of installations in the...
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URBAN WET-WEATHER FLOWS LITERATURE REVIEW 2000 |
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This paper is an urban wet weather flow (WWF) literature reviews for the year of 1999. The reviews were originally published in the annual literature review issues of Water Environ...
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US EPA REPORT ON STORMWATER BMP INSTALLATION, MODELING, AND DESIGN |
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For the past three decades, municipalities in the United States (U.S.) have successfully addressed pollution in the watershed by collecting and treating their wastewater. Advancem...
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USE OF A LUMPED MODEL (MAGIC) TO BOUND THE ESTIMATION OF POTENTIAL FUTURE EFFECTS OF SULFUR AND NITROGEN DEPOSITION ON LAKE CHEMISTRY IN THE ADIRONDACK MOUNTAINS |
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Leaching of atmospherically deposited nitrogen from forested watersheds can acidify lakes and streams. Using a modified version of the Model of Acidification of Groundwater in Cat...
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USE OF CHEMISTRY AND STABLE SULFUR ISOTOPES TO DETERMINE SOURCES OF TRENDS IN SULFATE OF COLORADO LAKES |
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Lakes in the Mt. irkel wilderness Area (MZWA) and the Weminuche Wilderness Area (WWA) of Colorado have been monitored since 1985. he initial results indicate that changes have occu...
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USE OF ECOLOGICAL RISK ASSESSMENT FOR DEVELOPING AND COORDINATING RESEARCH AT REGIONAL AND WATERSHED SCALES |
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A series of studies were undertaken to develop quantitative methods that could be used for ecological risk assessments at a watershed scale. This work contributed to the newly publ...
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USE OF FOREST SITE INDEX FOR EVALUATING TERRESTRIAL RESOURCES AT RISK FROM ACIDIC DEPOSITION |
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The principal goal of this chapter is a discussion of the applicability of forest growth measurement to the detection of acidic deposition impacts on forest growth. he chapter has ...
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USE OF GEOSPATIAL DATA TO PREDICT DOWNSTREAM IMPACTS OF COAL MINING IN AN APPALACHIAN WATERSHED |
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Mountaintop removal and valley filling is a method of mining coal that results in burial of Appalachian headwater streams. Leaching of fill material often results in elevated ion c...
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USE OF GEOSPATIAL DATA TO PREDICT DOWNSTREAM IMPACTS OF COAL MINING IN AN APPALACHIAN WATESHED |
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Our objective was to use physicochemistry collected throughout a partially mined watershed to quantify downstream influence of headwater streams using exploratory geostatistical to...
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USE OF HISTORICAL ASSESSMENT FOR EVALUATION OF PROCESS-BASED MODEL PROJECTIONS OF FUTURE ENVIRONMENTAL CHANGE: LAKE ACIDIFICATION IN THE ADIRONDACK MOUNTAINS, NEW YORK, USA |
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Because of the considerable uncertainties associated with modeling complex ecosystem processes, it is essential that every effort be made to test model performance prior to relying...
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USE OF LANDSCAPE METRICS TO PRIORITIZE WATERSHEDS FOR ECOLOGICAL RESTORATION IN ARKANSAS WHITE RIVER BASIN |
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Techniques for the broad-scale identification of wetland restoration sites are increasingly being sought for the purposes of improving the functions of wetlands that influence wate...
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USE OF LIDAR TO MAP STREAM MORPHOLOGY AND MONITOR CHANGES DUE TO URBANIZATION OF A SMALL SUBURBAN WATERSHED |
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Urbanization has been associated with changes in stream flow regime, morphology, and water
quality of rural watersheds being developed. Most studies of the effect of urbanizati...
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USE OF OUTPUT FROM THE NEW ENGLAND SPARROW MODEL TO ESTIMATE CONCENTRATIONS OF TOTAL NITROGEN IN ESTUARIES |
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The USGS=s SPARROW Model is a statistical model with mechanistic features that has been used to calculate annual nutrient fluxes in nontidal streams nationally on the basis of nitr...
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USE OF PERIPHYTON ASSEMBLAGE DATA AS AN INDEX OF BIOTIC INTEGRITY |
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Periphyton assemblages data collected from 233 stream site-visits (49 in 1993, 56 in 1994, and 128 in 1995) throughout the Mid-Appalachian region were used to develop a periphyton ...
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USE OF RELAXED EDDY ACCUMULATION TO MEASURE BIOSPHERE-ATMOSPHERE EXCHANGE OF ISOPRENE AND OTHER BIOLOGICAL TRACE GASES |
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The micrometeorological flux measurement technique known as relaxed eddy accumulation (REA) holds promise as a powerful new tool for ecologists. The more popular eddy covariance (e...
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USE OF REMOTELY SENSED DATA FOR PARAMETERIZING AND VALIDATING LAND-USE HYDROLOGIC MODELS |
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Variability in vegetation greenness was determined for the Galveston Bay watershed using biweekly Normalized Difference Vegetation Index (NDVI) data derived from the Advanced Very ...
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USE OF THRESHOLDS IN LANDSCAPE ASSESSMENTS |
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Identification and use of thresholds are potentially important additions to interpretations of ecological monitoring data. However, there are a number of issues related to definin...
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USE OF WATERSHED CHARACTERISTICS TO SELECT CONTROL STREAMS FOR ESTIMATING EFFECTS OF METAL MINING WASTES ON EXTENSIVELY DISTURBED STREAMS |
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Impacts of sediments and heavy metals on the biota of streams in the copper-mining district of southwestern Montana were examined by comparing aquatic communities of impacted strea...
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USE OF WATERSHED CLASSIFICATION IN MONITORING FRAMEWORKS FOR THE WESTERN LAKE SUPERIOR BASIS |
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In this case study we predicted stream sensitivity to nonpoint source pollution based on the nonlinear responses of hydrologic regimes and associated loadings of nonpoint source po...
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USE OF WATERSHED CLASSIFICATION IN MONITORING FRAMEWORKS: FORGING LINKS BETWEEN 305(B) AND 303(D) |
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In the context of CWA 305(b) and 303(d) requirments, a discussion of the watershed classification system and how it relates to monitoring frameworks....
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USEPA EPIC IMPERVIOUS SURFACE RESEARCH IN THE MID-ATLANTIC |
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Anthropogenic impervious surfaces have an important relationship with non-point source pollution (NPS) in urban watersheds. These human-created surfaces include such features as r...
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USEPA WATERSHED APPROACH |
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The U.S. Environmental Protection Agency's Office of Research and Development has developed a well defined research plan to evaluate pollutants within watersheds. This plan is def...
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USEPA'S APPROACH FOR ESTABLISHING NATIONAL NUTRIENT CRITERIA FOR ESTUARIES AND COASTAL WATER |
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The USEP A is developing procedures for establishing nutrient criteria to aid states and tribes in setting nutrient standards for the nation's water bodies and coastal waters. Crit...
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USING AN INTENSIVE ASSESSMENT METHOD TO CALIBRATE A RAPID WETLAND ASSESSMENT METHOD: AN EXAMPLE FROM NANTICOKE BASIN, DELAWARE AND MARYLAND, USA |
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The development of rapid assessment methods has become a priority for many organizations that want to report on the condition of wetlands at larger scales requiring many sampling s...
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USING BIOLOGICAL DATA TO EVALUATE STATUS AND TRENDS IN A WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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USING BROAD-SCALE METRICS TO DEVELOP INDICATORS OF WATERSHED VULNERABILITY IN THE OZARK MOUNTAINS (USA) |
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Multiple broad-scale landscape metrics were tested as potential indicators of total phosphorus (TP) concentration, total ammonia (TA) concentration, and Escherichia coli (E. coli) ...
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USING CLASSIFICATION CONSISTENCY IN INTER-SCENE OVERLAP AREAS TO MODEL SPATIAL VARIATIONS IN LAND-COVER ACCURACY OVER LARGE GEOGRAPHIC REGIONS |
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During the last decade, a number of initiatives have been undertaken to create systematic national and global data sets of processed satellite imagery. An important application of ...
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USING ECONOMIC ANALYSIS TO VALUE WATER REMEDIATION: AN APPLICATION TO THE CHEAT RIVER WATERSHED IN WEST VIRGINIA |
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Inherent in any decision to allocate resources is the constraint imposed by a limited budget. In small communities, particularly in rural areas, this often means stark tradeoffs a...
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USING ENERGY AND EMERGY TO COUPLE GEOMORPHOLOGY AND HUMAN INFLUENCES INTO A WATERSHED/LANDSCAPE INDEX AND LINK THE INDEX TO DOWNSTREAM WATER AND HABITAT QUALITY |
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The Clean Water Act requires identification of all waters whose abiotic and biotic integrity have been compromised or impaired, but it is impossible to assess each water body in th...
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USING GIS TO MAP THE DEPTH TO SEDIMENT IN A POND |
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Researchers at the National Risk Management Research Laboratory, USEPA, have been characterizing the source, form, and extent of subsurface contamination of arsenic in an industria...
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USING GIS TO MAP THE DEPTH TO SEDIMENT OF A POND USING A SONIC DEPTH METER AND A TRIMBLE GPS SYSTEM |
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During a research project to identify the source of Arsenic in a watershed, it became necessary to characterize the subsurface sediments in a pond associated with the watershed. T...
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USING HISTORICAL BIOLOGICAL DATA TO EVALUATE STATUS AND TRENDS IN THE BIG DARBY CREEK (OHIO) WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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USING HISTORICAL BIOLOGICAL DATA TO EVALUATE STATUS AND TRENDS IN THE BIG DARBY CREEK WATERSHED (OHIO, USA) |
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Assessment of watershed ecological status and trends is challenging for managers who lack randomly or consistently sampled data, or monitoring programs developed from a watershed p...
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USING LAKE SEDIMENT MERCURY FLUX RATIOS TO EVALUATE THE REGIONAL AND CONTINENTAL DIMENSIONS OF MERCURY DEPOSITION IN ARCTIC AND BOREAL ECOSYSTEMS |
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Anthropogenically elevated Hg deposition in arctic and subarctic ecosystems is potentially a serious environmental problem, particularly in northern Europe and North America. To de...
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USING LANDSCAPE ECOLOGY AND PARTIAL LEAST SQUARES PREDICITIONS TO MAP WATERSHEDS THAT ARE VULNERABLE TO NON-POINT SOURCE POLLUTION |
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The U.S. Environmental Protection Agency¿s Office of Research and Development have mapped and interpreted landscape-scale (i.e., broad scale) ecological metrics among watersheds in...
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USING LANDSCAPE ECOLOGY AND PARTIAL LEAST SQUARES PREDICTIONS TO MAP WATERSHEDS THAT ARE VULNERABLE TO NON-POINT SOURCE POLLUTION |
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The U.S. Environmental Protection Agency's Office of Research and Development have mapped and interpreted landscape-scale (i.e., broad scale) ecological metrics among watersheds in...
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USING LANDSCAPE ECOLOGY TO MAP WATERSHEDS THAT ARE VULNERABLE TO NON-POINT SOURCE POLLUTION IN THE OZARKS |
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The U.S. EPA's Office of Research and Development, and U.S. EPA Region 7 have collaborated to map and interpret landscape-scale (i.e. broad-scale) ecological metrics among watershe...
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USING LANDSCAPE ECOLOGY TO MAP WATERSHEDS THAT ARE VULNERABLE TO NON-POINT SOURCE POLLUTION IN THE WHITE RIVER WATERSHED |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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USING LONG-TERM CHEMICAL AND BIOLOGICAL INDICATORS TO ASSESS STREAM HEALTH IN THE UPPER OCONEE RIVER WATERSHED |
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Macroinvertebrates are commonly used as biological indicators of stream habitat and water quality. Chemical variables, such as dissolved oxygen (DO), specific conductance (SC), an...
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USING LONG-TERM CHEMICAL AND BIOLOGICAL INDICATORS TO ASSESS STREAM HEALTH IN THE UPPER OCONEE RIVER WATERSHED |
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Macroinvertebrates are commonly used as biological indicators of stream water and habitat quality. Sediment is a common pollutant in streams, and high levels of sediment are linke...
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USING MARKET INCENTIVES TO PROMOTE DECENTRALIZED STORMWATER MANAGEMENT |
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Stormwater runoff from impervious surfaces in urban and suburban areas has led to human safety risks and widespread stream ecosystem impairment. While centralized stormwater manag...
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USING MUSSEL ISOTOPE RATIOS TO ASSESS ANTHROPOGEN NITROGEN INPUTS TO COASTAL ECOSYSTEMS |
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The stable nitrogen isotope ratio in ribbed mussel (Geukensia demissus) tissue was investigated as an indicator of the source of nitrogen inputs to coastal salt marshes. Mussels fe...
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USING MUSSEL ISTOPE RATIOS TO ASSESS ANTHROPOGENIC NITROGEN INPUTS TO FRESHWATER ECOSYSTEMS |
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Stable nitrogen isotope ratios ( 15N) of freshwater mussels from a series of lakes and ponds were related to watershed land use characteristics to assess their utility in determini...
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USING STREAM MORPHOLOGY CLASSIFICATION TO MANAGE ECOLOGICAL RISKS FROM LAND USE CHANGES IN THE LMR WATERSHED |
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Changes in the amount and types of land use in a watershed can destabilize stream channel structure, increase sediment loading and degrade in-stream habitat. Stream classification...
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USING THE REGIONAL ACID DEPOSITION MODEL TO DETERMINE THE NITROGEN DEPOSITION AIRSHED OF THE CHESAPEAKE BAY WATERSHED |
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The Regional Acid Deposition Model, RADM, an advanced Eulerian model, is used to develop an estimate of the primary airshed of nitrogen oxide (NOx) emissions that is contributing n...
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USING THE SEDIMENT QUALITY TRIAD (SQT) APPROACH TO ASSESS SEDIMENTARY CONTAMINATION IN THE ANACOSTIA RIVER, WASHINGTON |
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Using the Sediment Quality Triad (SQT) Approach to Assess Sedimentary Contamination in the Anacostia River, Washington, D.C. Velinsky, DJ*1, Ashley, JTF1,2, Pinkney, F.3, McGee, BL...
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USING TRADABLE CREDITS TO MANAGE STORMWATER |
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Excess stormwater runoff causes degradation of urban stream habitat through conveyance of pollutants and disruption of normal stream flow regimes. Following on acceptance of tradab...
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USING WATERSHED COMPOSITION AND STRUCTURE AS INDICATORS OF ESTUARINE CONDITION |
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Many researchers examining relationships between water quality and the surrounding watershed have focused on landscape metrics associated with composition (e.g., % of the whole wat...
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USING WINTER FLOUNDER GROWTH RATES TO ASSSESS HABITAT QUALITY IN RHODE ISLAND'S COASTAL LAGOONS |
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We used growth rates of juvenile winter flounder Pseudopleuronectes americanus, to assess habitat quality in 3 of Rhode Island's coastal salt ponds that had differing levels of nut...
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USUING STREAM MORPHOLOGY CLASSIFICATION TO MANAGE ECOLOGICAL RISKS FROM LAND USE CHANGES IN THE LMR WATERSHED |
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Changes in the amount and types of land use in a watershed can destabilize stream channel structure, increase sediment loading and degrade in-stream habitat. Stream classification...
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UTILITY OF SITE-BASED SAMPLING FOR CHARACTERIZING WAATERSHEDS AND FISH DISTRIBUTION PATTERNS |
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abstract - Utility fo site-based sampling ......
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UTILIZATION OF LANDSCAPE INDICATORS TO MODEL WATERSHED IMPAIRMENT |
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Many water-bodies within the United States are contaminated by non-point source (NPS) pollution, which is defined as those materials posing a threat to water quality arisin...
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Use of geospatial data to predict downstream influence of coal mining in Appalachia |
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A 2001 Supreme Court decision first called into question whether some headwater streams could be considered jurisdictional under the Clean Water Act. A subsequent decision then re...
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Using Streamflow as a Predictor of Biotic Health in the Upper Oconee Watershed |
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Macroinvertebrates are commonly used as biological indicators of stream habitat and water quality. Chronic reduced streamflows can have a significant impact on biota, decreasing in...
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Using stable isotopes and models to explore estuarine linkages at multiple scales |
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Estuarine managers need tools to respond to dynamic stressors that occur in three linked environments – coastal ocean, estuaries and watersheds. Models have been the tool of choic...
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VALUING ACID MINE DRAINAGE REMEDIATION IN WEST VIRGINIA: A HEDONIC MODELING APPROACH INCORPORATING GEOGRAPHIC INFORMATION SYSTEMS |
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States with active and abandoned mines face large private and public costs to remediate damage to streams and rivers from acid mine drainage (AMD). Appalachian states have an espec...
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VALUING ACID MINE DRAINAGE REMEDIATION OF IMPAIRED WATERWAYS IN WEST VIRGINIA: A HEDONIC MODELING APPROACH |
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States with active and abandoned mines face large private and public costs to remediate damage to streams and rivers from acid mine drainage (AMD), the metal rich runoff flowing pr...
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VARIABILITY IN SOILS AND VEGETATION ASSOCIATED WITH HARVESTER ANT (POGONOMYRMEX RUGOSUS) NESTS ON A CHIHUAHUAN DESERT WATERSHED |
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The effects of harvester ant (Pogonomyrmex rugosus) nests on the density and cover of spring annual plants and on soil characteristics were measured at three locations characterize...
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VARIABILITY, PATTERN, AND SENSITIVITY OF ECOLOGICAL INDICAORS FOR NEARSHORE REGIONS OF THE GREAT LAKES |
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Associated with the Great Lakes Environmental Indicators (GLEI) project of the EaGLe program, we are evaluating a suite of indicators of ecological condition for the nearshore regi...
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VARIATION IN JUVENILE COHO SALMON END-OF-SUMMER SIZE AND ABUNDANCE: HIERARCHICAL ANALYSIS OF HABITAT EFFECTS |
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The size of coho salmon juveniles entering the winter has been shown to influence overwinter survival, and hence may be a useful indicator of linkages between summer habitat condit...
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VARIATION IN JUVENILE COHO SALMON END-OF-SUMMER SIZE: HIERARACHICAL ANALYSIS OF HABITAT EFFECTS |
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The size of coho salmon juveniles entering the winter has been shown to influence overwinter survival, and hence may be a useful indicator of linkages between summer habitat condit...
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VARIATION OF IMPERVIOUS AREAS AND URBAN WATERSHED HYDROLOGY. (R827149) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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VARYING STABLE NITROGEN ISOTOPIC RATIOS OF DIFFERENT COASTAL MARSH PLANTS AND THEIR RELATIONSHIPS WITH WASTEWATER NITROGEN AND LAND USE IN NEW ENGLAND, USA |
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Stable nitrogen isotopic ratios of coastal biota have been used as indicators of sources of anthropogenic nitrogen. In this study the relationships of the stable nitrogen isotop...
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VERIFICATION OF BALLAST WATER TREATMENT SYSTEMS UNDER EPA'S ENVIRONMENTAL TECHNOLOGY VERIFICATION (ETV) PROGRAM |
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This paper presents a brief overview of the EPA's ETV program which was established in 1995 to overcome the numerous impediments to commercialization experienced by developers of i...
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VETERINARY PHARMACEUTICALS: POTENTIAL ENVIRONMENTAL IMPACT AND TREATMENT STRATEGIES |
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In the late 1970s it was recognized that there were increasing occurrences of antibiotic-resistant organisms in Europe and the US. Even in the early stages, concerns were raised th...
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VULNERABILITY OF BULL TROUT TO EARLY LIFE STAGE TOXICITY OF 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN (TCDD) AND OTHER AHR AGONISTS |
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Population declines of bull trout, Salvelinus confluentus, have occurred in recent decades throughout much of the species' natural range in the Columbia River watershed and other r...
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WAQUOIT BAY WATERSHED (BROCHURE) |
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What is an ecological risk assessment?
An ecological risk assessment evaluates the potential adverse effects of human activities on the plants and animals that make up ec...
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WAQUOIT BAY WATERSHED ECOLOGICAL RISK ASSESSMENT: THE EFFECT OF LAND-DERIVED NITROGEN LOADS ON ESTUARINE EUTROPHICATION |
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A watershed ecological risk assessment of Waquoit Bay, located on the south coast of Cape Cod, MA, was performed for managers to better understand the environmental impacts of huma...
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WARE RIVER INTENSIVE WATERSHED STUDY - 1. NONPOINT SOURCE CONTRIBUTIONS |
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Runoff quantity and quality were monitored for row crop, residential and forested lands in the Ware basin for the period of October 1979 to July 1981. Loading rates have been calcu...
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WARE RIVER INTENSIVE WATERSHED STUDY - 2. ESTUARINE RECEIVING WATER QUALITY |
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The Ware River is a relatively 'clean' estuarine system. However, during summer months some of the nutrients, particularly inorganic phosphorus and organic nitrogen, achieve levels...
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WATER INFILTRATION CONTROL TO ACHIEVE MINE WATER POLLUTION CONTROL: THE DENTS RUN WATERSHED DEMONSTRATION PROJECT |
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The objective of this study was to demonstrate the effectiveness of surface mined land reclamation measures in establishing surface water infiltratin control to prevent or reduce p...
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WATER POLLUTION IN THE LAKE SUPERIOR BASIN: IMPLICATIONS FOR WATER USES |
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This will be an overview of water quality issues in Lake Superior, with illustrations of how watershed management can impact nearshore Lake Superior water quality....
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WATER QUALITY EARLY WARNING SYSTEMS FOR SOURCE WATER PROTECTION |
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Source waters of the U.S. are vulnerable to natural and anthropogenic factors affecting quality for use as both a drinking water and ecological media. Important factors include ph...
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WATER QUALITY MODELING RESEARCH |
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The multi-year planning science question of what additions to models are most needed for the TMDL process for priority stressors is addressed. Our research provides both the neede...
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WATER QUALITY VULNERABILITY IN THE OZARKS USING LANDSCAPE ECOLOGY METRICS: UPPER WHITE RIVER BROWSER (V2.0) |
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The principal focus of this project is the mapping and interpretation of landscape scale (i.e., broad scale) ecological metrics among contributing watersheds of the Upper White Riv...
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WATER QUALITY VULNERABILITY IN THE OZARKS: AN ONGOING ASSESSMENT OF THE UPPER WHITE RIVER WATERSHED |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field.
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WATER-ROCK INTERACTIONS INFLUENCING MERCURY FATE AND TRANSPORT FROM AN ABANDONED MINE SITE TO AN ADJACENT AQUATIC ECOSYSTEM |
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Clear Lake, located 150 km north of San Francisco, is one of the largest fresh water lakes in California and is an important economic resource for the region. Elevated mercury lev...
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WATER-ROCK INTERACTIONS INFLUENCING MERCURY FATE AND TRANSPORT FROM AN ABANDONED MINE SITE TO AN ADJACENT AQUATIC ECOSYSTEM: ABSTRACT |
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NRMRL-ADA-01319
Jewett*, D.G., Manges, E., Reller, G.J., Engle, and Bauman. Water-Rock Interactions Influencing
Mercury Fate and Transport From An Abandoned Mine Site To An Adjace...
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WATERSHED (SOUTHWESTERN OHIO) |
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We are evaluating the use of stream geomorphology and related measurements in the assessment and management of channel risks associated with stream impairment associated with clean...
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WATERSHED AND LAKE INFLUENCES ON THE ENERGETIC BASE OF GREAT LAKES COASTAL WETLAND FOOD WEBS |
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This work describes patterns in the energetic foundation of Great Lakes coastal wetlands as a function of system hydrology, nutrient enrichment, and interactions with the adjacent ...
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WATERSHED AND OTHER PLACE-BASED RISK ASSESSMENTS |
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Place-based assessments include regional, watershed and other geographically focused assessments. |
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WATERSHED AND POINT SOURCE ENRICHMENT AND LAKE TROPHIC STATE INDEX |
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Water in the permeable soils of the upper Pelican River watershed, Minnesota, requires slightly more than a year to move generally out of the phreatic zone into surface channels an...
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WATERSHED AND WATER BODY VULNERABILITY ASSESSMENT - THEIR PLACE IN WATERSHED MANAGEMENT. (R830885) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WATERSHED AND WATER QUALITY MODELING TECHNICAL SUPPORT CENTER |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WATERSHED AND WATER QUALITY MODELING TECHNICAL SUPPORT CENTER OVERVIEW |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WATERSHED ASSESSMENT OF LANDSCAPE CHANGE AND IMPACTS TO AQUATIC RESOURCES: A MULTI-SCALE CASE STUDY OF OREGON (USA) WITH FUTURE SCENARIOUS ANALYSIS |
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Studies of plausible future management and policy options provide a mechanism to examine possible outcomes and especially their likely benefits and consequences....
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WATERSHED BASED SURVEY DESIGNS |
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The development of watershed-based design and assessment tools will help to serve the multiple goals for water quality monitoring required under the Clean Water Act, including asse...
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WATERSHED BIOGEOCHEMISTRY IN THE OREGON COAST RANGE: THE ROLE OF RED ALDER AND SALMON |
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Variations in plant community composition across the landscape can influence nutrient retention and loss at the watershed scale. A striking example of plant species influence is t...
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WATERSHED BOUNDARY CONDITIONS FOR GLOBAL CHANGE IMPACT ANALYSIS |
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The US Global Change Research Program (USGCRP) studies (among other issues) the impact of global change on water quality. This field study evaluates the impact of global changes (...
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WATERSHED BOUNDARY CONDITIONS FOR GLOBAL CHANGE IMPACT ANALYSIS |
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The US Global Change Research Program (USGCRP) studies (among other issues) the impact of global change on water quality. This field study evaluates the impact of global changes (...
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WATERSHED CENTRAL: AN INTEGRATED WATERSHED ASSESSMENT AND MANAGEMENT PROJECT |
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The Clean Water Act (CWA) requires that States develop and implement pollution reduction targets for impaired or threatened waters often referred to as total maximum daily loads (T...
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WATERSHED CENTRAL: AN INTEGRATED WATERSHED ASSESSMENT AND MANAGEMENT WEBSITE |
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The Clean Water Act (CWA) requires that States develop pollution reduction targets for impaired or threatened waters often referred to as total maximum daily loads (TMDLs). These ...
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WATERSHED CENTRAL: AN INTEGRATED WATERSHED ASSESSMENT AND MANAGEMENT WEBSITE (2) |
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The Clean Water Act (CWA) requires that States develop pollution reduction targets for impaired or threatened waters often referred to as total maximum daily loads (TMDLs). These ...
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WATERSHED CENTRAL: AN INTEGRATED WATERSHED ASSESSMENT AND MANAGEMENT WEBSITE (PRESENTATION) |
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The Clean Water Act (CWA) requires that States develop pollution reduction targets for impaired or threatened waters often referred to as total maximum daily loads (TMDLs). These ...
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WATERSHED CHARACTERIZATION USING LANDSAT THEMATIC MAPPER IMAGERY: BLACKFOOT RIVER, MT |
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This report describes a portion of a large regional project undertaken by the Environmental Protection Agency (EPA) and water quality authorities in the States of Montana, Idaho, a...
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WATERSHED CLASSIFICATION AS A DIAGNOSTIC TOOL FOR CONSOLIDATED ASSESSMENT AND LISTING PROGRAMS |
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With over 40,000 TMDLs scheduled for development, the states, tribes, and EPA Regions need efficient streamlined approaches for watershed level inventory, monitoring, condition ass...
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WATERSHED CLASSIFICATION AS A TOOL FOR MONITORING, ASSESSMENT, AND MANAGEMENT |
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Most sources of stream impairment are related to nonpoint source pollution. To more efficiently deal with TMDL-related issues, an integrated approach to small watershed assessment...
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WATERSHED CLASSIFICATION AS A TOOL TO PARTITION VARIANCE IN NUTRIENT- BIOLOGICAL RESPONSE RELATIONSHIPS |
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Diagnostic indicators of stream impairment as a result of nutrients, will be presented to the US EPA Biological Advisory Committee....
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WATERSHED CLASSIFICATION: LINKING MONITORING, LISTING, AND DIAGNOSIS |
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This describes a watershed classification approach that helps to link activities under CWA sections 305(b) and 303(d), using a case study developed with the state of West Virginia ...
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WATERSHED EARLY WARNING SYSTEMS |
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Contaminants are of concern when they are found in concentrations that are toxic to plants and/or animals. On-line Toxicity Monitors (OTMs) integrate all factors resulting in stre...
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WATERSHED EARLY WARNING SYSTEMS |
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Contaminants are of concern when they are found in concentrations that are toxic to plants and/or animals. On-line Toxicity Monitors (OTM) integrate all dissolved and bound chemic...
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WATERSHED ECOLOGICAL RISK ASSESSMENT CASE STUDIES |
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NCEA and OW are applying the general principles outlined in the Ecological Risk Assessment Guidelines to improve decision making in five watersheds. These ecological risk assessmen...
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WATERSHED EROSION AND SEDIMENT TRANSPORT MODEL |
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This report describes the development and initial testing of the Watershed Erosion and Sediment Transport (WEST) Model. It is a deterministic conceptual model which operates in two...
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WATERSHED HEALTH ASSESSMENT TOOLS - INVESTIGATING FISHERIES (WHAT-IF) |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WATERSHED HEALTH ASSESSMENT TOOLS INVESTIGATING FISHERIES WHAT IF VERSION 2 A MANAGER'S GUIDE TO NEW FEATURES |
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The Canaan Valley Institute (CVI) is dedicated to addressing the environmental problems in the Mid-Atlantic Highlands (MAH). Their goal is to develop and implement solutions to res...
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WATERSHED HEALTH ASSESSMENT TOOLS-INVESTIGATING FISHERIES (WHAT-IF): A MODELING TOOLKIT FOR WATERSHED AND FISHERIES MANAGEMENT |
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The Watershed Health Assessment Tools-Investigating Fisheries (WHAT-IF) is a decision-analysis modeling toolkit for personal computers that supports watershed and fisheries managem...
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WATERSHED HEALTH ASSESSMENT TOOLS-INVESTIGATING FISHERIES (WHAT-IF): A MODELING TOOLKIT FOR WATERSHED AND FISHERIES MANAGEMENT |
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The Watershed Health Assessment Tools-Investigating Fisheries (WHAT-IF) is a decision-analysis modeling toolkit for personal computers that supports watershed and fisheries managem...
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WATERSHED INFLUENCES ON MERCURY TRANSPORT TO LAKE SUPERIOR. (R827629) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WATERSHED LAND USE INFLUENCES NUTRIENT CONCENTRATIONS OF PHRAGMITES AUSTRALIS LEAVES IN SUBESTUARIES OF CHESAPEAKE BAY. (R828684C001) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WATERSHED LANDSCAPE INDICATORS OF ESTUARINE BENTHIC CONDITION |
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Do land use/cover characteristics of watersheds associated with small estuaries exhibit a strong enough signal to make landscape metrics useful for identifying degraded bottom comm...
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WATERSHED LEVEL RISK ASSESSMENT OF NITROGEN AND PHOSPHOROUS EXPORT |
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The distribution of different types of land cover across a watershed is a principal factor in controlling the amount of nitrogen and phosphorous exported from a watershed. ...
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WATERSHED MANAGEMENT AND ARCGIS: THE RELEASE OF AGWA 2.0 |
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Focusing time, energy, and money where it can be best utilized is in the best interest of managers
everywhere. By making tools more widely available that facilitate the iden...
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WATERSHED MANAGEMENT AND ECOSYSTEM RESTORATION RESEARCH AT THE US EPA SUBSURFACE PROTECTION AND REMEDIATION DIVISION IN ADA, OK |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WATERSHED MANAGEMENT AND THE WEB. (R824766) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WATERSHED MANAGEMENT AND THE WEB. (R827169) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WATERSHED MANIPULATION PROJECT QUALITY ASSURANCE IMPLEMENTATION PLAN: FY90-93 |
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The purpose of quality assurance/quality control (QA/QC) is to ensure that data from research and monitoring studies are of known and documented quality to satisfy project objectiv...
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WATERSHED MANIPULATION PROJECT: CASE STUDY OF AN INTERLABORATORY COMPARISON PROGRAM |
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Assessing and achieving interlaboratory comparability is a major quality assurance challenge for large interdisciplinary, multi-institutional, environmental research projects. ight...
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WATERSHED MANIPULATION PROJECT: FIELD IMPLEMENTATION PLAN FOR 1986-1989 |
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The Field Implementation Plan (FIP) of the Watershed Manipulation Project (WMP) has been developed for the Bear Brook Watershed in Maine (BBWM). This document provides details on f...
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WATERSHED MANIPULATION PROJECT: FIELD IMPLEMENTATION PLAN FOR 1990-1992 |
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The Bear Brook watershed in Maine (BBWM) was established in 1986 at Lead Mountain, Maine as part of the Environmental Protection Agency's (EPA) watershed Manipulation Project (WPM)...
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WATERSHED MANIPULATION PROJECT: QUALITY ASSURANCE IMPLEMENTATION PLAN FOR 1986-1989 |
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The Watershed Manipulation Project (WMP) was implemented by EPA to: identify and quantify the relative importance of various processes in controlling surface water acidification wi...
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WATERSHED MANIPULATION PROJECT: RATIONALE FOR HYPOTHESIS FORMULATION AND TESTING |
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The Watershed Manipulation Project (WMP) was implemented by EPA to: identify and quantify the relative importance of various processes in controlling surface water acidification wi...
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WATERSHED NITROGEN AND PHOSPHOROUS BALANCE: THE UPPER POTOMAC RIVER BASIN |
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Nitrogen and phosphorus mass balances were estimated for the portion of the Potomac River basin watershed located above Washington, D.C. he total nitrogen (N) balance included seve...
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WATERSHED NITROGEN MANAGEMENT "UPPER POTOMAC RIVER BASIN CASE STUDY" |
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Are watershed processes controlling the yield, transport, and transformation of carbon, nitrogen, and phosphorous scientifically understood and amenable to man's control in an ecol...
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WATERSHED PLANNING AND THE USE OF DISTRIBUTED MODELING CONCEPTS: ASSESSING THE CUMULATIVE HYDROLOGIC EFFECTS OF POTENTIAL LANDUSE CHANGE IN TWO OREGON WATERSHEDS. (R827146) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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WATERSHED RESTORATION AND FISHERIES MANAGEMENT IN THE MID-ATLANTIC HIGHLANDS |
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This presentation is about watershed restoration and fisheries management in the Mid-Atlantic Highlands. The goal of the Canaan Valley Institue is to develop and implement solution...
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WATERSHED RESTORATION AND FISHERIES MANAGEMENT: CANAAN VALLEY INSTITUTE - WHAT IF? |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WATERSHED RESTORATION--ADAPTIVE DECISION MAKING IN THE FACE OF UNCERTAINTY |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WATERSHED SENSITIVITY MEASUREMENT STRATEGY FOR IDENTIFYING RESOURCES AT RISK FROM ACIDIC DEPOSITION |
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Several lines of research on the effects of acidic deposition have been supported by EPA through its Environmental Research Laboratories and through a Cooperative Agreement with No...
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WATERSHED SURVEYS TO SUPPORT AN ASSESSMENT OF THE REGIONAL EFFECTS OF ACIDIC DEPOSITION ON SURFACE WATER CHEMISTRY |
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The results of these surveys and the conclusions of the DDRP will be presented in several future papers. he current paper gives an overview of the contents, rationale, logistical c...
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WATERSHED TREATMENT EFFECT ON ORGANIC CARBON AND COLOR INTERACTIONS IN STREAMS IN THE WESTERN ARM OF LAKE SUPERIOR |
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Dissolved organic carbon can significantly attenuate UV penetration in water bodies and potentially protect aquatic organisms from effects of ozone depletion....
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WATERSHED TREATMENT EFFECTS ON SULFATE REDUCTION AND ALKALINITY CONCENTRATIONS IN NORTH AND SOUTH SHORE STREAMS ON THE WESTERN ARM OF LAKE SUPERIOR |
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A comparative watershed framework was used to assess aquatic ecosystem vulnerability within the western Lake Superior watershed....
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WATERSHED-BASED SURVEY DESIGNS |
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Water-based sampling design and assessment tools help serve the multiple goals for water quality monitoring required under the Clean Water Act, including assessment of regional con...
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WATERSHED-ESTUARY SUSTAINABILITY: WHAT STAKEHOLDERS VALUE |
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Sustainable development is defined as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs"1. To evaluat...
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WATERSHEDS AS THE BASIC ECOSYSTEM: THIS CONCEPTUAL FRAMEWORK PROVIDES A BASIS FOR A NATURAL CLASSIFICATION SYSTEM |
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A scheme is outlined to classify watersheds as ecosystems, based on their natural attributes. Two physical factors of the environment, climate and geology, are selected as state fa...
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WATERSHEED NUTRIENT INPUTS, PHYTOPLANKTON ACCUMULATION, AND C STOCKS IN CHESAPEAKE BAY |
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Inputs of N and P to Chesapeake Bay have been enhanced by anthropogenic activities. Fertilizers, developed areas, N emissions, and industrial effluents contribute to point and diff...
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WEB-BASED WATERSHED MANAGEMENT TOOLS FOR THE MID-ATLANTIC HIGHLANDS |
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There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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WESTERN AIRBORNE CONTAMINANTS ASSESSMENT PROJECT (WACAP): ASSESSING DEPOSITION AND IMPACTS OF PERSISTENT ORGANIC POLLUTANTS AND METALS IN SEVEN NATIONAL PARKS IN THE WESTERN UNITED STATES |
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Airborne contaminants, especially those that biomagnify in the food chain, can pose serious health threats to wildlife and humans. Biological effects of airborne contaminants incl...
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WESTERN ECOLOGY DIVISION - GENERAL INFORMATION SHEET |
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abstract for flyer - general information
The Western Ecology Division (WED), part of EPAs National Health and Environmental Effects Research Laboratory, provides information to E...
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WESTERN ECOLOGY DIVISION RESEARCH UPDATE - JUNE 2003 |
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This is a "newsletter" of science findings and a feature article...
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WETLAND MONITORING AND ASSESSMENT TO SUPPORT DECISION MAKING: A VISION FOR THE FUTURE |
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The recent report of the National Research Council on wetland mitigation again highlighted the need for regional watershed evaluation as a context from which to determine the effic...
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WETLANDS AS BMPS AND THEIR USE IN TRADING OF NUTRIENT AND SEDIMENT REDUCTION CREDITS |
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WETLANDS AS BMPs AND THEIR USE IN TRADING OF NUTRIENT AND SEDIMENT REDUCTION CREDITS
J. Schubauer-Berigan (NRMRL), D. Brown (NRMRL), D. Burden (NRMRL), T. Canfield (NRMRL), W. F...
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WHAT DEGRADED THIS STREAM? TOOLS TO DETERMINE THE CAUSES OF ECOLOGICAL IMPAIRMENT |
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The identification of causes of impairment for waterbodies listed as biologically impaired is required as part of many federal, state and tribal regulations. The Office of Researc...
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WHAT GOES UP MUST COME DOWN: A LAGRANGIAN STUDY OF POTENTIAL CHEMICAL IDICATORS OF FECAL CONTAMINATION DOWNSTREAM FROM WASTEWATER PLANTS |
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In earlier studies, we have determined that pharmaceuticals and other compounds found in household wastewater (such as surfactants, disinfectants, and scenting agents) are present ...
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WHAT'S THE C IN CBAT |
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Community Based Environmental Protection (CBEP) has the intention of making environmental protection spring from the needs and values of the community of interest. Real community i...
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WHAT'S THE C IN CBEP |
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Community Based Environmental Protection (CBEP) intends to make environmental protection spring from the needs and values of the community of interest. Real community involvement i...
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WHICH AIRBORNE CONTAMINANTS POSE THE GREATEST RISK TO WESTERN NATIONAL PARKS (USA)? |
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The Western Airborne Contaminants Assessment Project (WACAP) was initiated in 2002 by the National Park Service to determine if airborne contaminants where having an impact on remo...
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WILDLIFE RISK ASSESSMENT: DEVELOPMENT OF METHODS TO ASSESS THE EFFECTS OF MERCURY AND HABITAT ALTERATION ON POPULATIONS OF AQUATIC-DEPENDENT WILDLIFE |
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NHEERL is conducting a demonstration project to develop tools and approaches for assessing the risks of multiple stressors to populations of piscivorous wildlife, leading to the ...
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WORKSHOP REPORT ON CHARACTERIZING ECOLOGICAL RISK AT THE WATERSHED SCALE |
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As ecological risk assessment evolves, it is moving beyond a focus on single species toward addressing multiple species and their interactions, and from assessing effects of simple...
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WV R-EMAP SMALL WATERSHED CHARACTERIZATION, CLASSIFICATION, AND ASSESSMENT FOR WEST VIRGINIA UTILIZING EMAP DESIGN AND TOOLS |
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A probabilistic watershed-based framework was developed to encompass wadeable streams within all three ecoregions of West Virginia, with the exclusion noted below. In Phase I of t...
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WV R-EMAP STUDY: MULTIPLE-OBJECTIVE SAMPLING DESIGN FRAMEWORK |
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A multi-objective sampling design has been implemented through Regional Monitoring and Assessment Program (R-EMAP) support of a cooperative agreement with the state of West Virgini...
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WV REMAP FINAL REPORT: WATERSHED CLASSIFICATION FRAMEWORK FOR THE STATE OF WEST VIRGINIA |
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One of the products for the WV REMAP project has been cleared as an EPA Report. The report describes the methodology for developing a watershed classification framework for monitor...
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WVR-EMAP A SMALL WATERSHED CHARACTERIZATION, CLASSIFICATION, AND ASSESSMENT FOR WEST VIRGINIA UTILIZING EMAP DESIGN AND TOOLS |
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Nationwide, there is a strong need to streamline methods for assessing impairment of surface waters (305b listings), diagnosing cause of biological impairment (303d listings), esti...
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Water Resources Adaptation to Global Changes: Risk Management through Sustainable Infrastructure Planning and Management - Paper |
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Global changes due to cyclic and long-term climatic variations, demographic changes and economic development, have impacts on the quality and quantity of potable and irrigation sou...
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Water Resources Adaptation to Global Changes: Risk Management through Sustainable Infrastructure Planning and Managements |
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Global changes due to cyclic and long-term climatic variations, demographic changes and economic development, have impacts on the quality and quantity of potable and irrigation sou...
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Watershed Central: An Integrated Watershed Assessment and Management Website (Columbus, OH workshop). |
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The U.S.EPA’s Office of Water (OW), Office of Research and Development (ORD), and Office of Environmental Information (OEI) have teamed together with other Federal Agencies, state ...
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Watershed Central: An Integrated Watershed Assessment and Management Website (MO presentation) |
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The U.S. EPA’s Office of Water (OW), Office of Research and Development (ORD), and Office of Environmental Information (OEI) have teamed together with other Federal Agencies, state...
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Watershed Management Tool for Selection and Spacial Allocation of Non-Point Source Pollution Control Practices |
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Distributed-parameter watershed models are often utilized for evaluating the effectiveness of sediment and nutrient abatement strategies through the traditional {calibrate→ validat...
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Watershed Management in the United States |
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A watershed approach provides an effective framework for dealing with water resources challenges. Watersheds provide drinking water, recreation, and ecological habitat, as well as ...
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Watershed Nitrogen Modeling: Benefits of Diverse Approaches Using a Case Study from New York State |
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Watershed-scale models have evolved as an important tool for estimating the sources, transformation, and transport of contaminants to surface water systems. A wide variety of mode...
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ZOOBENTHOS ASSEMBLAGES AS INDICATORS OF LAKE SUPERIOR COASTAL WETLAND CONDITIONS |
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Little is known about the diversity or structure of zoobenthos assemblages in Great Lakes coastal wetlands. As part of a comparative study in western Lake Superior we wanted to inv...
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