Jeff Raffensperger, Ground-Water Specialist
Contact Information
U.S. Geological Survey
5522 Research Park Drive
Baltimore, Maryland 21228
Phone: 443-498-5542
Fax: 443-498-5510
Email: jpraffen@usgs.gov
Education
- Ph.D.
- Johns Hopkins University, Baltimore, MD, Ph.D. (Hydrogeology), 1993
- M.A.
- Johns Hopkins University, Baltimore, MD, M.A. (Hydrogeology), 1990
- M.S.
- Louisiana State University, Baton Rouge, LA, M.S. (Geology), 1988
- B.S.
- University of Maryland, College Park, MD, B.S. Cum Laude (Geology), 1985
Professional Activities
-- Advisory
Editor, Geofluids
-- Associate Editor, Ground Water,
1999-2002
-- Member, USEPA Chesapeake Bay Program
Modeling Subcommittee
Selected Publications
Raffensperger, J. P. and Garven, G. 1995. The formation of unconformity-type uranium ore deposits 1. Coupled groundwater flow and heat transport modeling. American Journal of Science, 295, 581-636.
Raffensperger, J. P. and Garven, G. 1995. The formation of unconformity-type uranium ore deposits 2. Coupled hydrochemical modeling. American Journal of Science, 295, 639-696.
Wetzel, L. R., Raffensperger, J. P., and Shock, E. L. 2001. Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models. Journal of Volcanology and Geothermal Research, 110, 319-342.
Hornberger, G. M., Scanlon, T. M., and Raffensperger, J. P. 2001. Modelling transport of dissolved silica in a forested headwater catchment: the effect of hydrological and chemical time scales on hysteresis in the concentration-discharge relationship. Hydrological Processes, 15, 2029-2038.
Scanlon, T. M., Raffensperger, J. P., and Hornberger, G. M. 2001. Modeling transport of dissolved silica in a forested headwater catchment: implications for defining the hydrochemical response of observed flow pathways. Water Resources Research, 37(4), 1071-1082.
Scanlon, T. M., Raffensperger, J. P., Hornberger, G. M., and Clapp, R. B. 2000. Shallow subsurface stormflow in a forested headwater catchment: observations and modeling using a modified TOPMODEL. Water Resources Research, 36(9), 2575-2586.
Raffensperger, J. P., and Vlassopoulos, D. 1999. The potential for free and mixed convection in sedimentary basins. Hydrogeology Journal, 7(6), 505-520.
Raffensperger, J. P. 1997. Evidence and modeling of large-scale groundwater convection in Precambrian sedimentary basins. In Basin-wide Diagenetic Patterns: Integrated Petrologic, Geochemical, and Hydrologic Considerations. Montañez, I. P., Gregg, J. M., and Shelton, K. L., Editors. SEPM Special Publication No. 57. SEPM, Tulsa, OK, 15-26.
Garven, G. and Raffensperger, J. P. 1997. Hydrogeology and geochemistry of ore genesis in sedimentary basins. Chapter 4 in Geochemistry of Hydrothermal Ore Deposits. 3rd ed. Barnes, H. L., Editor. John Wiley & Sons, New York, NY, 125-189.
Person, M., Raffensperger, J. P., Ge, S., and Garven, G. 1996. Basin-scale hydrogeologic modeling. Reviews of Geophysics, 34(1), 61-87.
Raffensperger, J. P. 1996. Numerical simulation of sedimentary basin-scale hydrochemical processes. In Advances in Porous Media. Corapcioglu, M. Y., Editor. Volume 3. Elsevier, Amsterdam, 185-305.
Raffensperger, J. P. 1996. Earth's hydrosphere. In Encyclopedia of Earth Sciences. Dasch, E. J., Editor. Volume 1. Simon & Schuster Macmillan, New York, 243-246.
Garven, G. and Raffensperger, J. P. 1996. Two-dimensional reactive-flow modeling of uranium transport in Proterozoic sedimentary basins. Joint U.S. Geological Survey, U.S. Nuclear Regulatory Commission Workshop on Research Related to Low-level Radioactive Waste Disposal, National Center, Reston, Virginia, May 4–6, 1993. Stevens, P. R. and Nicholson, T. J., Editors. U. S. Geological Survey Water Resources-Investigations 95-4015, 196-200.
Evans, D. G. and Raffensperger, J. P. 1992. On the stream function for variable-density groundwater flow. Water Resources Research, 28(8), 2141-2145.
Raffensperger, J. P. and Ferrell, R. E., Jr. 1991. An empirical model of intrinsic permeability in reactive clay-bearing sands. Water Resources Research, 27(11), 2835-2844.
Raffensperger, J. P. and Ferrell, R. E., Jr. 1990. Permeant-induced changes in the permeability, microtexture, and pore structure of unconsolidated water-sensitive sediments. Proceedings of the 9th International Clay Conference, Strasbourg, 1989, Farmer, V. C. and Tardy, Y., Editors. Sciences Géologiques, Mémoires, 87, 75-83.
Professional Experience
United
States Geological Survey / United States
Environmental Protection Agency Chesapeake
Bay Program, Annapolis, Maryland, Monitoring
Coordinator. Research Hydrologist, 2001-present.
-- Currently
responsible for coordinating monitoring
efforts of multiple state and federal
agencies in support of the efforts of
the Chesapeake Bay Program and the signatory
jurisdictions of the 2000 Chesapeake Bay
Agreement.
United
States Geological Survey, Baltimore, Maryland
Chesapeake Bay Placed-Based Studies Program,
Research Hydrologist, 1996 – 2001.
-- Led
the effort to develop SPARROW models to
provide cooperating agencies with information
regarding the spatial distribution of
environmental factors affecting stream
nutrient loading.
United States Geological Survey, Baltimore,
Maryland USEPA EMAP / USGS NAWQA Joint Assessment
Program, Research Hydrologist, 1998.
-- Participated
in a study of the potential for joint
monitoring designs between the EMAP and
NAWQA programs by performing statistical
studies of the relative advantages of
the two monitoring designs.
United States Geological Survey, Towson,
Maryland, Patuxent Nonpoint Source Study,
Research Hydrologist, 1990 - 1996
-- In
cooperation with Maryland Department of
the Environment, acted as project leader
for a large study designed to evaluate
water quality and simulate nonpoint source
nutrient loading in the Patuxent watershed.
United
States Geological Survey, Towson, Maryland
Maryland Stream-Gaging Network Evaluation
Study, Research Hydrologist, 1995
-- Performed
a statistical evaluation study of the
stream-gaging network in the State of
Maryland.
United
States Geological Survey, Towson, Maryland,
Maryland Ungaged Basin Study, Research Hydrologist,
1992 - 1994
-- Designed
and conducted a study of the use of regional
geographic information for estimating
nonpoint source nutrient loading from
ungaged subbasins of the Chesapeake Bay
watershed.
University
of Maryland Baltimore County, Baltimore,
Maryland, Department of Geography, Adjunct
Professor, 1996 – present.
-- Teaches undergraduate level course in water quality.
University
of Notre Dame, Notre Dame, Indiana, Department
of Civil Engineering, PhD Program, September,
1986 - June, 1990
-- Conducted
research to evaluate statistical techniques
for the estimation of stream contaminant
loads.
Barr Engineering Company, Minneapolis, Minnesota, Water Chemist/ Env. Engineer, April, 1986 - September, 1986
University of Minnesota, Minneapolis, Minnesota, Department of Civil and Mineral Engineering, Research Associate/ Assistant, November, 1983 - April, 1986.
Environmental Science and Engineering Inc., Gainesville, Florida, Water Resources Engineering, September, 1982 - October, 1983
University of Florida, Gainesville, Florida, Department of Environmental Engineering Sciences, Graduate Program, March, 1980 - April, 1983
Water and Air Research Inc., Gainesville, Florida, Engineering Technician, August, 1979 - March, 1980
Publications
Alexander, R.B., Smith, R.A., Schwarz, G.E., Preston, S.D., Brakebill, J.W., Srinivasan, R., and Pacheco, P.A., 2000, Atmospheric Nitrogen Flux from the Watersheds of Major Estuaries of the United States: An Application of the SPARROW Watershed Model, in Assessing the Relative Nitrogen Inputs to Coastal Waters from the Atmosphere, American Geophysical Union Water Monograph, Valigura, R., Paerl, H.W., Meyers, T., Castro,M.S., Turner, R.E., Alexander, R.B., Brock, D., and Stacey, P.E. (editors).
Preston, S.D., and Brakebill, J.W., 1999, Application of spatially referenced regression modeling for the evaluation of total nitrogen in the Chesapeake Bay watershed: U.S. Geological Survey Water-Resources Investigations Report 99-4054, p. 12.
Brakebill, J.W., and Preston, S.D., 1999, Digital data used to relate nutrient inputs to water quality in the Chesapeake Bay watershed, Version 1.0: U.S. Geological Survey Open-File Report 96-60, at URL http://md.usgs.gov/publications/ofr-99-60.
Preston, S.D., Smith, R.A., Schwarz, G.E., Alexander, R.B., and Brakebill, J.W., 1998, Spatially referenced regression modeling of nutrient loading in the Chesapeake Bay watershed, in Proceedings of the First Federal Interagency Hydrologic Modeling Conference, Las Vegas, NV, p. 8.
Preston, S.D., and Summers, R.S., 1997, Estimation of nutrient and suspended-sediment loads in the Patuxent River Basin, Maryland, Water Years 1986-90: U.S. Geological Survey Water-Resources Investigations Report 96-4175, p. 69.
Preston, S.D., 1997, Evaluation of the stream-gaging network in Maryland, Delaware and Washington, D.C.: U.S. Geological Survey Fact Sheet 97-126, p. 4.
Preston, S.D., 1996, Study of nonpoint source nutrient loading in the Patuxent River Basin, Maryland: U.S. Geological Survey Water-Resources Investigations Report 96-4273, p. 6.
Preston, S.D., V.J. Bierman Jr and S.E. Silliman. 1992. Impact of Flow Variability on Error in the Estimation of TributaryMass Loads. ASCE Journal of Environmental Engineering. 118(3):402 - 419.
Preston, S.D., 1990, An evaluation of methods for the estimation of tributary mass loads. The University of Notre Dame, Department of Civil Engineering, Ph.D. Dissertation p.261.
Preston, S.D., V.J. Bierman Jr and S.E. Silliman. 1989 Evaluation of Methods for the Estimation of Tributary Mass Loading Rates. Report submitted to the U.S. Geological Survey, Reston, VA. Project No. G1561-04. Technical Report No. 187. p. 50.
Preston, S.D., V.J. Bierman Jr and S.E. Silliman. 1988. An Evaluation of Methods for the Estimation of Tributary Mass Loads. Water Resources Research. 25(6): 1379 - 1389.
Bierman Jr, V.J., S.D. Preston and S.E. Silliman. 1988 Development of Estimation Methods for Tributary Loading Rates of Toxic Chemicals. Report submitted to the U.S. Geological Survey, Reston, VA. Project No. G1421-04. Technical Report No. 183. 158 pp.
Preston, S.D., and P.L. Brezonik. 1985 Water Quality in the Oklawaha Chain of Lakes: A Case Study on Problems and Limitations in Compiling Long-Term Data Bases. Proceedings of the Fourth Annual Conference and International Symposium on Lake and Reservoir Management. North American Lake Management Society.
Preston, S.D., S.E., 1983, Numerical analyses of a Eutrophic Lake Chain, The University of Florida, Department of Environmental Engineering Sciences, Master's Thesis, 194 p.
Huber, W.C., P.L. Brezonik, J.P. Heaney, R.E. Dickinson, S.D. Preston, D.S. Dwornik and M.A. DeMaio. 1983. A Classification of Florida Lakes. Report to Florida Department of Environmental Regulation, Tallahassee. Report no. ENV-05-82-1, Department of Environmental Engineering Sciences, University of Florida, Gainesville, Florida.
Brezonik, P.L., S.D. Preston and T.L. Crisman. 1981. Limnological Studies on Lake Apopka and the Oklawaha Chain of Lakes: 4. Water Quality in 1980 and a Summary of the Four Year Data Base. Report no. ENV-07-81-02, Department of EnvironmentalEngineering Sciences, University of Florida, Gainesville, Florida. 140 pp.
Presentations
Meeting with EPA Region III and State Officials for identifying methods for establishing Nutrient Criteria, Baltimore, Maryland. Spatially Referenced Regression Modeling of Nutrient Loading in the Chesapeake Bay Watershed. December, 1999.
Workshop on Agriculture and Coastal Resources: Issues in Measuring the Economic Dimensions of Problems and Policies, Washington, DC. Modeling the Spatial Distribution of Nutrient Loads in the Chesapeake Bay Watershed. June 1999.
Meeting of the Lake Nutrient Assessment Team of the New England Integrated Water Pollution Control Commission and EPA Region I, Lowell, Massachusetts. Spatially Referenced Regression Modeling of Nutrient Loading in the Chesapeake Bay Watershed. May, 1999.
Federally Supported Science in the Chesapeake Bay Program Workshop, Laurel, Maryland. Spatially Referenced Regression Modeling of Nutrient Loading in the Chesapeake Bay Watershed. December, 1998.
Meeting of the Advisory Committee on Water Information, Denver, Colorado. Spatially Referenced Regression Modeling of Nutrient Loading in the Chesapeake Bay Watershed. August, 1998.
First Federal Interagency Hydrologic Modeling Conference. Las Vegas, Nevada. Spatially Referenced Regression Modeling ofNutrient Loading in the Chesapeake Bay Watershed. April, 1998.
Watershed `96, A National Conference on Watershed Management, Baltimore, Maryland. Generation and Comparison of Watershed Management Scenarios Patuxent River. June, 1996.
American Geophysical Union, 1994 Fall Meeting, San Francisco, California. Relations Between Land Use and Nitrogen Loading in the Patuxent River Basin and Chesapeake Bay Piedmont Area, Maryland. December, 1994.
United States Environmental Protection Agency Nonpoint Source Watershed Monitoring Conference, Northbrook, Illinois. Use of a Ratio Estimator to Estimate Nutrient Loads in the Patuxent River Basin, Maryland. August, 1994.
Chesapeake Research Consortium 1994 Conference, Norfolk, Virginia. Geographic Variations in Nitrogen Loading Within the Patuxent River Basin, Maryland. June, 1994.
United States Environmental Protection Agency Marine and Estuarine Shallow Water Science and Management in the Mid-Atlantic Region Conference, Atlantic City, New Jersey. Nutrient Loading to Estuarine Water from the Patuxent River Basin, Maryland. March, 1994.
United States Geological Survey. Presentation to the Chief Hydrologist, WRD, Reston, Virginia. Nonpoint Source Nutrient and Sediment Loading in the Patuxent River Basin, Maryland. September, 1993.
United States Geological Survey Chesapeake Bay Workshop, Harrisburg, Pennsylvania. Nonpoint Source Nutrient Loading in the Patuxent River Basin. January, 1992.
Surface Water Hydrology, Geomorphology and Sediment TransportJoint Discipline Research Workshop, Hood River, Oregon. Nonpoint Source Nutrient and Sediment Loading in the Patuxent River Basin, Maryland. September, 1991.
American Geophysical Union, 1991 Spring Meeting, Baltimore, Maryland. Compilation of a Long-Term Water-Quality Data Base for the Assessment of Nonpoint Source Nutrient Loading in the Patuxent River Basin, Maryland. May, 1991.
American Geophysical Union, 1989 Fall Meeting, San Francisco, California. Analysis of Error in the Estimation of Tributary Mass Loads. December, 1989.
International Association for Great Lakes Research 32nd Annual Conference, Madison, Wisconsin. Evaluation of Methods for the Estimation of Tributary Mass Loading Rates. May, 1989.
United States Geological Survey, Reston, Virginia. An Evaluation of Methods for Estimating Tributary Contaminant Loads. May, 1988.
North American Lake Management Society Annual Conference.WaterQuality in the Oklawaha Chain of Lakes: A Case Study on Problems and Limitations in Compiling Long Term Data Bases. 1985.
