Water Resources of Texas

Geologic Framework and Hydrogeologic Characteristics of the "Upper Confining Unit" to the Edwards Aquifer, Bexar County, TX Trinity Aquifer Assessment, Northern Bexar County, TX Karst and Invertebrate Survey of the Woodland Hills Natural Area, Northern Bexar County, TX Air Force Plant 4/Naval Air Station Ft. Worth Groundwater Model Conceptualization and simulation of the Edwards Aquifer, San Antonio region, Texas Water Resources Investigations of Lake LBJ, Texas Fort Bliss Urban Runoff: Volume-Frequency of the Fort Bliss SumpFluvial Geomorphic Units of the Middle and Lower Brazos and Navasota Rivers, Texas Historic Cross-Sectional Adjustment of the Middle and Lower Brazos and Navasota Rivers, Texas Potential for Bed-Material Entrainment in Selected Streams of the Edwards Plateau - Edwards, Kimble, and Real Counties, Texas, and vicinity Watershed Influences and In-Lake Processes Effect on Water-quality, Lake Houston, TX Water-Level Altitudes and Water-Level Changes in the Chicot, Evangeline, and Jasper Aquifers and Clay Compaction in the Chicot and Evangeline Aquifers, Houston-Galveston-Conroe Region, Texas Hydrologic and Geochemical Assessment of Flow Paths in the Edwards Aquifer, Northeastern Bexar and Southern Comal Counties, Texas Evaluation of Effects of Ashe Juniper Removal on Water Quantity, Water Quality, and Suspended-Sediment Loads, Honey Creek State Natural Area, South-Central, TX Water-Quality and Biological Assessments of Fluvial Sections of the Rio Grande, Pecos River, and Devils River in the Amistad National Recreation Area Lake Arrowhead Arsenic Study Big Cypress Creek Flows and Geomorphic Geodatabase and 3D Conceptual Model for Longhorn Army Ammunition Plant (LHAPP)Use of Compound-Specific Stable Isotopes of Carbon and Chlorine in Conjunction with Clorinated Ethene Concentration Ratios and Predominant Terminal Electron- Accepting Process Determinations for Source Tracking in a Clorinated-Solvent Plume, Fort Worth, Texas Distribution and Sources of Polychlorinated Biphenyls in Suspended, Streambed, and Lake-Bottom Sediment Samples from Meandering Road Creek and Woods Inlet, Lake Worth, Fort Worth, Texas, 2004-07 Groundwater Wells Under the Influence of Surface Water as Determined by Microscopic Particulate Analysis Sampling Predicated on Near Real-Time Geochemical Data

USGS Texas News

New Findings on PAHs & Urban Lake Contamination in Central & Eastern US (press release)

Scheduled Seminar Series

Please join us for these technical talks/WebEx sessions scheduled in the coming months.

No Seminars are scheduled at this time.

Map and directions to the Texas Water Science Center

View all seminars

USGS Texas Job Listings

A number of new employment opportunities with the Texas Water Science Center are currently available.

View all job listings

Cooperating Agency Reports

Rio Grande Ecosystem Restoration

Reference Maps

CoreCast

USGS Podcasts

Featured Publication

An Integrated Hydrogeologic and Geophysical Investigation to Characterize the Hydrostratigraphy of the Edwards Aquifer in an Area of Northeastern Bexar County, Texas





In August 2007, the U.S. Geological Survey, in cooperation with the San Antonio Water System, did a hydrogeologic and geophysical investigation to characterize the hydrostratigraphy (hydrostratigraphic zones) and also the hydrogeologic features (karst features such as sinkholes and caves) of the Edwards aquifer in a 16-square-kilometer area of northeastern Bexar County, Texas, undergoing urban development. Existing hydrostratigraphic information, enhanced by local-scale geologic mapping in the area, and surface geophysics were used to associate ranges of electrical resistivities obtained from capacitively coupled (CC) resistivity surveys, frequency-domain electromagnetic (FDEM) surveys, time-domain electromagnetic (TDEM) soundings, and two-dimensional direct-current (2D-DC) resistivity surveys with each of seven hydrostratigraphic zones (equivalent to members of the Kainer and Person Formations) of the Edwards aquifer. The principal finding of this investigation is the relation between electrical resistivity and the contacts between the hydrostratigraphic zones of the Edwards aquifer and the underlying Trinity aquifer in the area.

Search our publications

Spotlight on Texas Projects

The Texas Water Science Center conducts hydrologic projects that address a wide variety of water-resources issues, including water supply, groundwater contamination, nutrient loading in streams, effects of land use on water quality, and basic hydrologic data collection.

All Texas Projects

Featured Project:

Evaluation of Ashe Juniper removal on water-quality and water-quality, Honey Creek State National Area

The U.S, Geological Survey (USGS), in cooperation with the U.S. Department of Agriculture, Natural Resources Conservation Service, and in partnership with several state and local agencies, began a study in 1999 to evaluate the effects of ashe juniper (Juniperus ashei) control (removal) as a best-management practice (BMP) for increasing water quantity (aquifer recharge and streamflow) and protecting water quality in two watersheds located in the Honey Creek State Natural Area (HCSNA) in Comal County, Texas. In 2002, the study was expanded to include an additional watershed, Laurel Canyon Creek, located in the Government Canyon State Natural Area (GCSNA) in Bexar County, Texas.

• Hydrologic and water-quality data, Honey Creek State Natural Area, Comal County, Texas, August 2001-September 2003:U.S. Geological Survey Data Series 200

USGS Texas Highlights

Instantaneous Data Archive (IDA) (Quick look:
Since 1889 the United States Geological Survey has collected continuous stage, discharge, and other instantaneous time-series data on the nations rivers and streams. These time-series data have been and are typically recorded at intervals ranging from 5 to 60 minutes. These instantaneous data have been processed into and published as various daily values, such as the daily maximum, minimum, and/or mean. Because the published record are daily values, the original instantaneous data have not historically been officially approved, published, or made widely available. This web site has been established to make available as much historical instantaneous data from USGS data collection stations as possible. Although this site currently serves instantaneous discharge (streamflow) data only, work is planned to extend it to other time-series parameters in the future.

For more information about this topic, click now.)

The Instantaneous Data Archive() makes available as much intra-day streamflow data and historical instantaneous data continuous (measurements from every 5 to every 60 minutes), as possible, often several years' worth of data.