Jeff P Raffensperger, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 24
Optimal hydrograph separation using a recursive digital filter constrained by chemical mass balance, with application to selected Chesapeake Bay watersheds Optimal hydrograph separation using a recursive digital filter constrained by chemical mass balance, with application to selected Chesapeake Bay watersheds
Quantitative estimates of base flow are necessary to address questions concerning the vulnerability and response of the Nation’s water supply to natural and human-induced change in environmental conditions. An objective of the U.S. Geological Survey National Water-Quality Assessment Project is to determine how hydrologic systems are affected by watershed characteristics, including land...
Authors
Jeff P. Raffensperger, Anna C. Baker, Joel D. Blomquist, Jessica A. Hopple
Hydrogeologic framework, hydrology, and refined conceptual model of groundwater flow for Coastal Plain aquifers at the Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2005-12 Hydrogeologic framework, hydrology, and refined conceptual model of groundwater flow for Coastal Plain aquifers at the Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2005-12
From 1966 to 2002, activities at the Standard Chlorine of Delaware chemical facility in New Castle County, Delaware resulted in the contamination of groundwater, soils, and wetland sediment. In 2005, the U.S. Geological Survey (USGS), in partnership with the U.S. Environmental Protection Agency, Region 3, and the Delaware Department of Natural Resources and Environmental Control began a...
Authors
Michael J. Brayton, Roberto M. Cruz, Luke Myers, James R. Degnan, Jeff P. Raffensperger
Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12 Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12
Wetlands at the Standard Chlorine of Delaware, Inc. Superfund Site (SCD) in New Castle County, Delaware, are affected by contamination with chlorobenzenes and benzene from past waste storage and disposal, spills, leaks, and contaminated groundwater discharge. In cooperation with the U.S. Environmental Protection Agency, the U.S. Geological Survey began an investigation in June 2009 to...
Authors
Michelle M. Lorah, Charles W. Walker, Anna C. Baker, Jessica A. Teunis, Emily Majcher, Michael J. Brayton, Jeff P. Raffensperger, Isabelle M. Cozzarelli
Old groundwater in parts of the upper Patapsco aquifer, Atlantic Coastal Plain, Maryland, USA: Evidence from radiocarbon, chlorine-36 and helium-4 Old groundwater in parts of the upper Patapsco aquifer, Atlantic Coastal Plain, Maryland, USA: Evidence from radiocarbon, chlorine-36 and helium-4
Apparent groundwater ages along two flow paths in the upper Patapsco aquifer of the Maryland Atlantic Coastal Plain, USA, were estimated using 14C, 36Cl and 4He data. Most of the ages range from modern to about 500 ka, with one sample at 117 km downgradient from the recharge area dated by radiogenic 4He accumulation at more than one Ma. Last glacial maximum (LGM) water was located about...
Authors
Niel Plummer, John R. Eggleston, Jeff P. Raffensperger, Andrew G. Hunt, Gerolamo C. Casile, D. C. Andreasen
Simulation of groundwater flow to assess future withdrawals associated with Base Realignment and Closure (BRAC) at Fort George G. Meade, Maryland Simulation of groundwater flow to assess future withdrawals associated with Base Realignment and Closure (BRAC) at Fort George G. Meade, Maryland
Increased groundwater withdrawals from confined aquifers in the Maryland Coastal Plain to supply anticipated growth at Fort George G. Meade (Fort Meade) and surrounding areas resulting from the Department of Defense Base Realignment and Closure Program may have adverse effects in the outcrop or near-outcrop areas. Specifically, increased pumping from the Potomac Group aquifers...
Authors
Jeff P. Raffensperger, Brandon J. Fleming, William S.L. Banks, Marilee A. Horn, Mark R. Nardi, David C. Andreasen
Synthesis of U.S. Geological Survey science for the Chesapeake Bay ecosystem and implications for environmental management Synthesis of U.S. Geological Survey science for the Chesapeake Bay ecosystem and implications for environmental management
The purpose of this report is to present a synthesis of the USGS Chesapeake Bay science related to the 2001-06 goals and provide implications for environmental management. The report provides USGS findings that address the science needs of the Chesapeake Bay Program (CBP) restoration goals and includes summaries of 1. land-use change; 2. water quality in the watershed, including...
Authors
Scott W. Ator, Vicki S. Blazer, John W. Brakebill, Donald R. Cahoon, Peter R. Claggett, Thomas M. Cronin, Judith M. Denver, Christine L. Densmore, Allen C. Gellis, Cliff R. Hupp, Jurate M. Landwehr, Michael J. Langland, Christopher A. Ottinger, Milan J. Pavich, Matthew C. Perry, Scott W. Phillips, Stephen D. Preston, Jeff P. Raffensperger, Barnett A. Rattner, Nancy B. Rybicki, Debra A. Willard
Non-USGS Publications**
Raffensperger, J.P., 1997, Evidence and modeling of large-scale groundwater convection in Precambrian sedimentary basins, in Montañez, I.P., Gregg, J.M., and Shelton, K.L., eds., Basin-wide Diagenetic Patterns: Integrated Petrologic, Geochemical, and Hydrologic Considerations: Tulsa, OK, SEPM, No. 57, p. 15-26, http://archives.datapages.com/data/sepm_sp/SP57/Evidence_and_Modeling_of_Large-Scale.htm.
Garven, G., and Raffensperger, J.P., 1997, Hydrogeology and geochemistry of ore genesis in sedimentary basins, in Barnes, H.L., ed., Geochemistry of Hydrothermal Ore Deposits (3rd ed.): New York, John Wiley & Sons, Inc., p. 125-189.
Person, M., Raffensperger, J.P., Ge, S., and Garven, G., 1996, Basin-scale hydrogeologic modeling: Reviews of Geophysics, v. 34, no. 1, p. 61-87, https://dx.doi.org/10.1029/95RG03286.
Raffensperger, J.P., 1996, Numerical simulation of sedimentary basin-scale hydrochemical processes, in Corapcioglu, M.Y., ed., Advances in Porous Media: Amsterdam, Elsevier, Volume 3, p. 185-305.
Raffensperger, J.P., 1996, Earth's hydrosphere, in Dasch, E.J., ed., Encyclopedia of Earth Sciences: New York, Simon & Schuster Macmillan, Volume 1, p. 243-246.
Garven, G., and Raffensperger, J.P., 1996, Two-dimensional reactive-flow modeling of uranium transport in Proterozoic sedimentary basins, in 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: U. S. Geological Survey Water-Resources Investigations Report 95-4015, p. 196-200, https://pubs.er.usgs.gov/publication/wri954015.
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, v. 295, no. 5, p. 581-636, http://www.ajsonline.org/content/295/5/581.full.pdf+html.
Raffensperger, J.P., and Garven, G., 1995, The formation of unconformity-type uranium ore deposits 2. Coupled hydrochemical modeling: American Journal of Science, v. 295, no. 6, p. 639-696, http://www.ajsonline.org/content/295/6/639.full.pdf+html.
Evans, D.G., and Raffensperger, J.P., 1992, On the stream function for variable-density groundwater flow: Water Resources Research, v. 28, no. 8, p. 2141-2145, https://dx.doi.org/10.1029/92WR01060.
Raffensperger, J.P., and Ferrell, R.E., 1991, An empirical model of intrinsic permeability in reactive clay-bearing sands: Water Resources Research, v. 27, no. 11, p. 2835-2844, https://dx.doi.org/10.1029/91WR01570.
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: Sciences Géologiques, Mémoires, v. 87, p. 75-83.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 24
Optimal hydrograph separation using a recursive digital filter constrained by chemical mass balance, with application to selected Chesapeake Bay watersheds Optimal hydrograph separation using a recursive digital filter constrained by chemical mass balance, with application to selected Chesapeake Bay watersheds
Quantitative estimates of base flow are necessary to address questions concerning the vulnerability and response of the Nation’s water supply to natural and human-induced change in environmental conditions. An objective of the U.S. Geological Survey National Water-Quality Assessment Project is to determine how hydrologic systems are affected by watershed characteristics, including land...
Authors
Jeff P. Raffensperger, Anna C. Baker, Joel D. Blomquist, Jessica A. Hopple
Hydrogeologic framework, hydrology, and refined conceptual model of groundwater flow for Coastal Plain aquifers at the Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2005-12 Hydrogeologic framework, hydrology, and refined conceptual model of groundwater flow for Coastal Plain aquifers at the Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2005-12
From 1966 to 2002, activities at the Standard Chlorine of Delaware chemical facility in New Castle County, Delaware resulted in the contamination of groundwater, soils, and wetland sediment. In 2005, the U.S. Geological Survey (USGS), in partnership with the U.S. Environmental Protection Agency, Region 3, and the Delaware Department of Natural Resources and Environmental Control began a...
Authors
Michael J. Brayton, Roberto M. Cruz, Luke Myers, James R. Degnan, Jeff P. Raffensperger
Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12 Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12
Wetlands at the Standard Chlorine of Delaware, Inc. Superfund Site (SCD) in New Castle County, Delaware, are affected by contamination with chlorobenzenes and benzene from past waste storage and disposal, spills, leaks, and contaminated groundwater discharge. In cooperation with the U.S. Environmental Protection Agency, the U.S. Geological Survey began an investigation in June 2009 to...
Authors
Michelle M. Lorah, Charles W. Walker, Anna C. Baker, Jessica A. Teunis, Emily Majcher, Michael J. Brayton, Jeff P. Raffensperger, Isabelle M. Cozzarelli
Old groundwater in parts of the upper Patapsco aquifer, Atlantic Coastal Plain, Maryland, USA: Evidence from radiocarbon, chlorine-36 and helium-4 Old groundwater in parts of the upper Patapsco aquifer, Atlantic Coastal Plain, Maryland, USA: Evidence from radiocarbon, chlorine-36 and helium-4
Apparent groundwater ages along two flow paths in the upper Patapsco aquifer of the Maryland Atlantic Coastal Plain, USA, were estimated using 14C, 36Cl and 4He data. Most of the ages range from modern to about 500 ka, with one sample at 117 km downgradient from the recharge area dated by radiogenic 4He accumulation at more than one Ma. Last glacial maximum (LGM) water was located about...
Authors
Niel Plummer, John R. Eggleston, Jeff P. Raffensperger, Andrew G. Hunt, Gerolamo C. Casile, D. C. Andreasen
Simulation of groundwater flow to assess future withdrawals associated with Base Realignment and Closure (BRAC) at Fort George G. Meade, Maryland Simulation of groundwater flow to assess future withdrawals associated with Base Realignment and Closure (BRAC) at Fort George G. Meade, Maryland
Increased groundwater withdrawals from confined aquifers in the Maryland Coastal Plain to supply anticipated growth at Fort George G. Meade (Fort Meade) and surrounding areas resulting from the Department of Defense Base Realignment and Closure Program may have adverse effects in the outcrop or near-outcrop areas. Specifically, increased pumping from the Potomac Group aquifers...
Authors
Jeff P. Raffensperger, Brandon J. Fleming, William S.L. Banks, Marilee A. Horn, Mark R. Nardi, David C. Andreasen
Synthesis of U.S. Geological Survey science for the Chesapeake Bay ecosystem and implications for environmental management Synthesis of U.S. Geological Survey science for the Chesapeake Bay ecosystem and implications for environmental management
The purpose of this report is to present a synthesis of the USGS Chesapeake Bay science related to the 2001-06 goals and provide implications for environmental management. The report provides USGS findings that address the science needs of the Chesapeake Bay Program (CBP) restoration goals and includes summaries of 1. land-use change; 2. water quality in the watershed, including...
Authors
Scott W. Ator, Vicki S. Blazer, John W. Brakebill, Donald R. Cahoon, Peter R. Claggett, Thomas M. Cronin, Judith M. Denver, Christine L. Densmore, Allen C. Gellis, Cliff R. Hupp, Jurate M. Landwehr, Michael J. Langland, Christopher A. Ottinger, Milan J. Pavich, Matthew C. Perry, Scott W. Phillips, Stephen D. Preston, Jeff P. Raffensperger, Barnett A. Rattner, Nancy B. Rybicki, Debra A. Willard
Non-USGS Publications**
Raffensperger, J.P., 1997, Evidence and modeling of large-scale groundwater convection in Precambrian sedimentary basins, in Montañez, I.P., Gregg, J.M., and Shelton, K.L., eds., Basin-wide Diagenetic Patterns: Integrated Petrologic, Geochemical, and Hydrologic Considerations: Tulsa, OK, SEPM, No. 57, p. 15-26, http://archives.datapages.com/data/sepm_sp/SP57/Evidence_and_Modeling_of_Large-Scale.htm.
Garven, G., and Raffensperger, J.P., 1997, Hydrogeology and geochemistry of ore genesis in sedimentary basins, in Barnes, H.L., ed., Geochemistry of Hydrothermal Ore Deposits (3rd ed.): New York, John Wiley & Sons, Inc., p. 125-189.
Person, M., Raffensperger, J.P., Ge, S., and Garven, G., 1996, Basin-scale hydrogeologic modeling: Reviews of Geophysics, v. 34, no. 1, p. 61-87, https://dx.doi.org/10.1029/95RG03286.
Raffensperger, J.P., 1996, Numerical simulation of sedimentary basin-scale hydrochemical processes, in Corapcioglu, M.Y., ed., Advances in Porous Media: Amsterdam, Elsevier, Volume 3, p. 185-305.
Raffensperger, J.P., 1996, Earth's hydrosphere, in Dasch, E.J., ed., Encyclopedia of Earth Sciences: New York, Simon & Schuster Macmillan, Volume 1, p. 243-246.
Garven, G., and Raffensperger, J.P., 1996, Two-dimensional reactive-flow modeling of uranium transport in Proterozoic sedimentary basins, in 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: U. S. Geological Survey Water-Resources Investigations Report 95-4015, p. 196-200, https://pubs.er.usgs.gov/publication/wri954015.
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, v. 295, no. 5, p. 581-636, http://www.ajsonline.org/content/295/5/581.full.pdf+html.
Raffensperger, J.P., and Garven, G., 1995, The formation of unconformity-type uranium ore deposits 2. Coupled hydrochemical modeling: American Journal of Science, v. 295, no. 6, p. 639-696, http://www.ajsonline.org/content/295/6/639.full.pdf+html.
Evans, D.G., and Raffensperger, J.P., 1992, On the stream function for variable-density groundwater flow: Water Resources Research, v. 28, no. 8, p. 2141-2145, https://dx.doi.org/10.1029/92WR01060.
Raffensperger, J.P., and Ferrell, R.E., 1991, An empirical model of intrinsic permeability in reactive clay-bearing sands: Water Resources Research, v. 27, no. 11, p. 2835-2844, https://dx.doi.org/10.1029/91WR01570.
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: Sciences Géologiques, Mémoires, v. 87, p. 75-83.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.