Jim Tesoriero
Jim Tesoriero is a research hydrologist at the Oregon Water Science Center in Portland. His research interests include the transformation of contaminants along groundwater flow paths, groundwater-surface water interactions, and regional scale assessments of groundwater and stream vulnerability to contaminants using machine learning and statistical methods.
Science and Products
Filter Total Items: 41
The influence of nutrients and physical habitat in regulating algal biomass in agricultural streams
This study examined the relative influence of nutrients (nitrogen and phosphorus) and habitat on algal biomass in five agricultural regions of the United States. Sites were selected to capture a range of nutrient conditions, with 136 sites distributed over five study areas. Samples were collected in either 2003 or 2004, and analyzed for nutrients (nitrogen and phosphorous) and algal biomass (chlor
Authors
Mark D. Munn, Jeffrey W. Frey, Anthony J. Tesoriero
Identifying pathways and processes affecting nitrate and orthophosphate inputs to streams in agricultural watersheds
Understanding nutrient pathways to streams will improve nutrient management strategies and estimates of the time lag between when changes in land use practices occur and when water quality effects that result from these changes are observed. Nitrate and orthophosphate (OP) concentrations in several environmental compartments were examined in watersheds having a range of base flow index (BFI) value
Authors
A. J. Tesoriero, J.H. Duff, D. M. Wolock, N.E. Spahr, J.E. Almendinger
Whole-stream response to nitrate loading in three streams draining agricultural landscapes
Physical, chemical, hydrologic, and biologic factors affecting nitrate (NO3 −) removal were evaluated in three agricultural streams draining orchard/dairy and row crop settings. Using 3-d “snapshots” during biotically active periods, we estimated reach-level NO3 − sources, NO3 − mass balance, in-stream processing (nitrification, denitrification, and NO3 − uptake), and NO3 − retention potential ass
Authors
J.H. Duff, A. J. Tesoriero, W. B. Richardson, E.A. Strauss, M.D. Munn
Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides
Tracer-based ground-water ages, along with the concentrations of pesticides, nitrogen species, and other redox-active constituents, were used to evaluate the trends and transformations of agricultural chemicals along flow paths in diverse hydrogeologic settings. A range of conditions affecting the transformation of nitrate and pesticides (e.g., thickness of unsaturated zone, redox conditions) was
Authors
A. J. Tesoriero, D. A. Saad, K.R. Burow, E. A. Frick, L.J. Puckett, J.E. Barbash
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
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 and the pathways to surface water in a coastal plain setting in North Carolina. Data were collected from more than 35 wells and 4 surface-water sampling sites located in a 0.59 square-mile basin to examine detailed hydrog
Authors
T. B. Spruill, A. J. Tesoriero, H.E. Mew, K.M. Farrell, S.L. Harden, A.B. Colosimo, S.R. Kraemer
Nitrogen transport and transformations in a coastal plain watershed: Influence of geomorphology on flow paths and residence times
Nitrogen transport and groundwater‐surface water interactions were examined in a coastal plain watershed in the southeastern United States. Groundwater age dates, calculated using chlorofluorocarbon and tritium concentrations, along with concentrations of nitrogen species and other redox‐active constituents, were used to evaluate the fate and transport of nitrate. Nitrate is stable only in recentl
Authors
Anthony J. Tesoriero, Timothy B. Spruill, H.E. Mew, Kathleen M. Farrell, Stephen L. Harden
Geochemistry of shallow ground water in coastal plain environments in the southeastern United States: Implications for aquifer susceptibility
Ground-water chemistry data from coastal plain environments have been examined to determine the geochemical conditions and processes that occur in these areas and assess their implications for aquifer susceptibility. Two distinct geochemical environments were studied to represent a range of conditions: an inner coastal plain setting having more well-drained soils and lower organic carbon (C) conte
Authors
A. J. Tesoriero, T. B. Spruill, J. L. Eimers
Forensic applications of nitrogen and oxygen isotopes in tracing nitrate sources in urban environments
Ground and surface waters in urban areas are susceptible to nitrate contamination from septic systems, leaking sewer lines, and fertilizer applications. Source identification is a primary step toward a successful remediation plan in affected areas. In this respect, nitrogen and oxygen isotope ratios of nitrate, in conjunction with hydrologic data and water chemistry, have proven valuable in urban
Authors
S. R. Silva, P. B. Ging, R. W. Lee, J.C. Ebbert, A. J. Tesoriero, E. L. Inkpen
Fate and origin of 1,2-dichloropropane in an unconfined shallow aquifer
A shallow aquifer with different redox zones overlain by intensive agricultural activity was monitored for the occurrence of 1,2-dichloropropane (DCP) to assess the fate and origin of this pollutant. DCP was detected more frequently in groundwater samples collected in aerobic and nitrate-reducing zones than those collected from iron-reducing zones. Simulated DCP concentrations for groundwater ente
Authors
Anthony J. Tesoriero, F.E. Loffler, H. Liebscher
Ground-water quality in regional, agricultural, and urban settings in the Puget Sound Basin, Washington and British Columbia, 1996-1998
No abstract available.
Authors
E. L. Inkpen, A. J. Tesoriero, J.C. Ebbert, S. R. Silva, Mark W. Sandstrom
Water quality in the Puget Sound basin, Washington and British Columbia, 1996-98
Puget Sound basin streams during 1995-98 met most guidelines and criteria. Seventy-four manmade compounds were detected and different mixtures linked to land use. Urban expansion into forested areas is changing stream habitats--urban and agricultural streams are warmer and support less diverse insect populations than streams in forested areas. Elevated nitrate concentrations and the presence of ma
Authors
James C. Ebbert, Sandra S. Embrey, Robert W. Black, Anthony J. Tesoriero, Alan L. Haggland
Mechanism and rate of denitrification in an agricultural watershed: Electron and mass balance along groundwater flow paths
The rate and mechanism of nitrate removal along and between groundwater flow paths were investigated using a series of well nests screened in an unconfined sand and gravel aquifer. Intensive agricultural activity in this area has resulted in nitrate concentrations in groundwater often exceeding drinking water standards. Both the extent and rate of denitrification varied depending on the groundwate
Authors
Anthony J. Tesoriero, Hugh Liebscher, Stephen E. Cox
Non-USGS Publications**
**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: 41
The influence of nutrients and physical habitat in regulating algal biomass in agricultural streams
This study examined the relative influence of nutrients (nitrogen and phosphorus) and habitat on algal biomass in five agricultural regions of the United States. Sites were selected to capture a range of nutrient conditions, with 136 sites distributed over five study areas. Samples were collected in either 2003 or 2004, and analyzed for nutrients (nitrogen and phosphorous) and algal biomass (chlor
Authors
Mark D. Munn, Jeffrey W. Frey, Anthony J. Tesoriero
Identifying pathways and processes affecting nitrate and orthophosphate inputs to streams in agricultural watersheds
Understanding nutrient pathways to streams will improve nutrient management strategies and estimates of the time lag between when changes in land use practices occur and when water quality effects that result from these changes are observed. Nitrate and orthophosphate (OP) concentrations in several environmental compartments were examined in watersheds having a range of base flow index (BFI) value
Authors
A. J. Tesoriero, J.H. Duff, D. M. Wolock, N.E. Spahr, J.E. Almendinger
Whole-stream response to nitrate loading in three streams draining agricultural landscapes
Physical, chemical, hydrologic, and biologic factors affecting nitrate (NO3 −) removal were evaluated in three agricultural streams draining orchard/dairy and row crop settings. Using 3-d “snapshots” during biotically active periods, we estimated reach-level NO3 − sources, NO3 − mass balance, in-stream processing (nitrification, denitrification, and NO3 − uptake), and NO3 − retention potential ass
Authors
J.H. Duff, A. J. Tesoriero, W. B. Richardson, E.A. Strauss, M.D. Munn
Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides
Tracer-based ground-water ages, along with the concentrations of pesticides, nitrogen species, and other redox-active constituents, were used to evaluate the trends and transformations of agricultural chemicals along flow paths in diverse hydrogeologic settings. A range of conditions affecting the transformation of nitrate and pesticides (e.g., thickness of unsaturated zone, redox conditions) was
Authors
A. J. Tesoriero, D. A. Saad, K.R. Burow, E. A. Frick, L.J. Puckett, J.E. Barbash
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
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 and the pathways to surface water in a coastal plain setting in North Carolina. Data were collected from more than 35 wells and 4 surface-water sampling sites located in a 0.59 square-mile basin to examine detailed hydrog
Authors
T. B. Spruill, A. J. Tesoriero, H.E. Mew, K.M. Farrell, S.L. Harden, A.B. Colosimo, S.R. Kraemer
Nitrogen transport and transformations in a coastal plain watershed: Influence of geomorphology on flow paths and residence times
Nitrogen transport and groundwater‐surface water interactions were examined in a coastal plain watershed in the southeastern United States. Groundwater age dates, calculated using chlorofluorocarbon and tritium concentrations, along with concentrations of nitrogen species and other redox‐active constituents, were used to evaluate the fate and transport of nitrate. Nitrate is stable only in recentl
Authors
Anthony J. Tesoriero, Timothy B. Spruill, H.E. Mew, Kathleen M. Farrell, Stephen L. Harden
Geochemistry of shallow ground water in coastal plain environments in the southeastern United States: Implications for aquifer susceptibility
Ground-water chemistry data from coastal plain environments have been examined to determine the geochemical conditions and processes that occur in these areas and assess their implications for aquifer susceptibility. Two distinct geochemical environments were studied to represent a range of conditions: an inner coastal plain setting having more well-drained soils and lower organic carbon (C) conte
Authors
A. J. Tesoriero, T. B. Spruill, J. L. Eimers
Forensic applications of nitrogen and oxygen isotopes in tracing nitrate sources in urban environments
Ground and surface waters in urban areas are susceptible to nitrate contamination from septic systems, leaking sewer lines, and fertilizer applications. Source identification is a primary step toward a successful remediation plan in affected areas. In this respect, nitrogen and oxygen isotope ratios of nitrate, in conjunction with hydrologic data and water chemistry, have proven valuable in urban
Authors
S. R. Silva, P. B. Ging, R. W. Lee, J.C. Ebbert, A. J. Tesoriero, E. L. Inkpen
Fate and origin of 1,2-dichloropropane in an unconfined shallow aquifer
A shallow aquifer with different redox zones overlain by intensive agricultural activity was monitored for the occurrence of 1,2-dichloropropane (DCP) to assess the fate and origin of this pollutant. DCP was detected more frequently in groundwater samples collected in aerobic and nitrate-reducing zones than those collected from iron-reducing zones. Simulated DCP concentrations for groundwater ente
Authors
Anthony J. Tesoriero, F.E. Loffler, H. Liebscher
Ground-water quality in regional, agricultural, and urban settings in the Puget Sound Basin, Washington and British Columbia, 1996-1998
No abstract available.
Authors
E. L. Inkpen, A. J. Tesoriero, J.C. Ebbert, S. R. Silva, Mark W. Sandstrom
Water quality in the Puget Sound basin, Washington and British Columbia, 1996-98
Puget Sound basin streams during 1995-98 met most guidelines and criteria. Seventy-four manmade compounds were detected and different mixtures linked to land use. Urban expansion into forested areas is changing stream habitats--urban and agricultural streams are warmer and support less diverse insect populations than streams in forested areas. Elevated nitrate concentrations and the presence of ma
Authors
James C. Ebbert, Sandra S. Embrey, Robert W. Black, Anthony J. Tesoriero, Alan L. Haggland
Mechanism and rate of denitrification in an agricultural watershed: Electron and mass balance along groundwater flow paths
The rate and mechanism of nitrate removal along and between groundwater flow paths were investigated using a series of well nests screened in an unconfined sand and gravel aquifer. Intensive agricultural activity in this area has resulted in nitrate concentrations in groundwater often exceeding drinking water standards. Both the extent and rate of denitrification varied depending on the groundwate
Authors
Anthony J. Tesoriero, Hugh Liebscher, Stephen E. Cox
Non-USGS Publications**
**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.