Toxic Substances Hydrology Program

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The GeoHEALTH-USGS Newsletter provides information on new USGS science activities related to safeguarding the health of fish, wildlife, domesticated animals, livestock, and people from environmental exposures to contaminants and pathogens.

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Filter Total Items: 3,170
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Year Published: 1993

Effects of focused recharge on the transport of agricultural chemicals at the Princeton, Minnesota Management Systems Evaluation Area, 1991-92

Rates of water movement through the unsaturated zone greatly affect the amount and concentrations of agricultural chemicals that may reach the water table. For example, recharge can flush chemicals to the water table which have accumulated in the unsaturated zone during dry periods. A better understanding of how topography influences recharge and...

Delin, G.N.; Landon, M.K.
Effects of focused recharge on the transport of agricultural chemicals at the Princeton, Minnesota Management Systems Evaluation Area, 1991-92; 1993; OFR; 93-42; Delin, G. N.; Landon, M. K.

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Year Published: 1993

Effects of recharge on the transport of agricultural chemicals at the Princeton, Minn. Management Systems Evaluation Area (MSEA), 1991-92

Rates of water movement through the unsaturated zone greatly affect the amount and concentrations of agricultural chemicals that may reach the water table. For example, recharge can flush to the water table chemicals that have accumulated In the unsaturated zone during dry periods. A better understanding of how topography influences recharge and...

Delin, G.N.; Landon, M.K.
Effects of recharge on the transport of agricultural chemicals at the Princeton, Minn. Management Systems Evaluation Area (MSEA), 1991-92; 1993; OFR; 93-79; Delin, G. N.; Landon, M. K.

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Year Published: 1993

Evaluation of statistical models to predict chemical quality of shallow ground water in the Pine Barrens of Suffolk County, Long Island, New York

No abstract available.

Stackelberg, P.E.; Siwiec, S.F.
Evaluation of statistical models to predict chemical quality of shallow ground water in the Pine Barrens of Suffolk County, Long Island, New York; 1993; WRI; 92-4100; Stackelberg, P. E.; Siwiec, S. F.

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Year Published: 1993

Ground-water quality at the Management Systems Evaluation Area (MSEA) near Princeton, Minnesota, 1991

The northern cornbelt sand-plains Management Systems Evaluation Area (MSEA) program is a multiagency, multistate initiative to evaluate the effects of modified and prevailing fanning systems on water quality in a sand-plain area in Minnesota and at satellite areas in North and South Dakota, and Wisconsin (Delin and others, 1992). The primary...

Landon, Matthew K.; Delin, Geoffrey N.; Lamb, J.A.; Guo, Laodong
Ground-water quality at the Management Systems Evaluation Area (MSEA) near Princeton, Minnesota, 1991; 1993; OFR; 93-43; Landon, M. K.; Delin, G. N.; Lamb, J. A.; Guo, L.

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Year Published: 1993

Ground-water quality at the Management Systems Evaluation Area near Princeton, Minnesota, 1991-92

The northern cornbelt sand-plains Management Systems Evaluation Area (MSEA) program is a multiagency, multistate initiative to evaluate the effects of modified and prevailing farming systems on water quality in a sand-plain area in Minnesota and at satellite areas in North and South Dakota, and Wisconsin. The primary objective of Minnesota MSEA is...

Landon, Matthew K.; Delin, Geoffrey N.; Lamb, J.A.; Guo, Lei
Ground-water quality at the Management Systems Evaluation Area near Princeton, Minnesota, 1991-92; 1993; OFR; 93-80; Landon, M. K.; Delin, G. N.; Lamb, J. A.; Guo, Lei

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Year Published: 1993

Ground-water-quality assessment of the Central Oklahoma Aquifer, Oklahoma: Geochemical and geohydrologic investigations

The National Water-Quality Assessment pilot project for the Central Oklahoma aquifer examined the chemical and isotopic composition of ground water, the abundances and textures of minerals in core samples, and water levels and hydraulic properties in the flow system to identify geochemical reactions occurring in the aquifer and rates and...

Parkhurst, David L.; Christenson, Scott C.; Breit, George N.
Ground-water-quality assessment of the Central Oklahoma Aquifer, Oklahoma; geochemical and geohydrologic investigations; 1993; OFR; 92-642; Parkhurst, D. L.; Christenson, S. C.; Breit, G. N.

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Year Published: 1993

Hydrogeologic data collected from a crude-oil spill site near Bemidji, Minnesota, 1983-91

The U.S. Geological Survey began a research project at the site of a crude oil spill near Bemidji, Minnesota in 1983. The project is part of the U.S. Geological Survey's Toxic Substances Hydrology Program. The objectives of research at this site are to obtain an understanding of the mobilization, transport, and fate of petroleum derivatives in the...

Smith, S.E.; Hult, M.F.
Hydrogeologic data collected from a crude-oil spill site near Bemidji, Minnesota, 1983-91; 1993; OFR; 93-496; Smith, S. E.; Hult, M. F.

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Year Published: 1993

Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the Midcontinental United States, 1991

Water samples were collected during the spring and summer of 1991 from 303 wells penetrating near-surface unconsolidated and bedrock aquifers of the midcontinental United States. Samples were analyzed for 11 herbicides, 2 dealkylated atrazine metabolites, and 4 nutrients. Specific conductance, pH, and dissolved-oxygen concentrations of the ground...

Kolpin, D.W.; Burkart, M.R.; Thurman, E.M.
Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the Midcontinental United States, 1991; 1993; OFR; 93-114; Kolpin, D. W.; Burkart, M. R.; Thurman, E. M.

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Year Published: 1993

Impact of the Summitville Mine on irrigation water, agricultural soils, and alfalfa in the southwestern San Luis Valley, Colorado

No abstract available.

Erdman, J.A.; Smith, K.S.
Impact of the Summitville Mine on irrigation water, agricultural soils, and alfalfa in the southwestern San Luis Valley, Colorado; 1993; OFR; 93-616; Erdman, J. A.; Smith, K. S.

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Year Published: 1993

Occurrence and transport of agricultural chemicals in the Mississippi River basin, July through August 1993

Heavy rainfall and severe flooding in the upper Mississippi River Basin from mid-June through early August 1993 flushed extraordinarily large amounts of agricultural chemicals (herbicides and nitrate) into the Mississippi River, many of its tributaries, and, ultimately, the Gulf of Mexico. Even though extremely high streamflows were recorded...

Goolsby, Donald A.; Battaglin, William A.; Thurman, E. Michael
Occurrence and transport of agricultural chemicals in the Mississippi River basin, July through August 1993; 1993; CIR; 1120-C; Goolsby, Donald A.; Battaglin, William A.; Thurman, E. Michael

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Year Published: 1993

Particulate organic matter in the San Francisco Bay estuary, California: Chemical indicators of its origin and assimilation into the benthic food web

No abstract available.

Cloern, J.E.; Canuel, E.A.; Wienke, S.M.
Particulate organic matter in the San Francisco Bay estuary, California; chemical indicators of its origin and assimilation into the benthic food web; 1993; OFR; 93-146; Cloern, J. E.; Canuel, E. A.; Wienke, S. M.

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Year Published: 1993

Reconnaissance data for selected herbicides, two atrazine metabolities, and nitrate in surface water of the Midwestern United States, 1989-90

Water-quality data were collected from 147 rivers and streams during 1989-90 to assess selected preemergent herbicides, two atrazine metabolites, and nitrate in 10 Midwestern States. This report includes a description of the sampling design, data collection techniques, laboratory and analytical methods, and a compilation of constituent...

Scribner, E.A.; Thurman, E.M.; Goolsby, D.A.; Meyer, M.T.; Mills, M.S.; Pomes, M.L.
Reconnaissance data for selected herbicides, two atrazine metabolities, and nitrate in surface water of the Midwestern United States, 1989-90; 1993; OFR; 93-457; Scribner, E. A.; Thurman, E. M.; Goolsby, D. A.; Meyer, M. T.; Mills, M. S.; Pomes, M. L.