Toxic Substances Hydrology Program

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GeoHEALTH-USGS Newsletter

GeoHEALTH-USGS Newsletter

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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Featured Science Activities

Featured Science Activities

Lean about our Featured Science Activities through our pages that highlight recience studies, publications, and results.

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Filter Total Items: 2,978
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Year Published: 1992

Selected meteorological data for an arid site near Beatty, Nye County, Nevada, calendar year 1987

Selected meteorological data were collected at a study site adjacent to a low-level radioactive-waste burial facility near Beatty, Nevada, for calendar year 1987. Data were collected in support of an ongoing study to estimate the potential for downward movement of radionuclides into the unsaturated sediments beneath waste-burial trenches at the...

Wood, James L.; Fischer, Jeffrey M.
Selected meteorological data for an arid site near Beatty, Nye County, Nevada, calendar year 1987; 1992; OFR; 92-59; Wood, James L.; Fischer, Jeffrey M.

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Year Published: 1992

Selected meteorological data for an arid site near Beatty, Nye County, Nevada, calendar year 1988

Selected meteorological data were collected at a study site adjacent to a low-level radioactive-waste burial facility near Beatty/ Nevada, for calendar year 1988. Data were collected in support of ongoing studies to estimate the potential for downward movement of radionuclides into the unsaturated sediments beneath waste-burial trenches at the...

Wood, James L.; Hill, Kevin J.; Andraski, Brian J.
Selected meteorological data for an arid site near Beatty, Nye County, Nevada, calendar year 1988; 1992; OFR; 92-61; Wood, James L.; Hill, Kevin J.; Andraski, B. J.

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Year Published: 1992

Selected meteorological data for an arid site near Beatty, Nye County, Nevada, calendar year 1989

Selected meteorological data were collected at a study site adjacent to a low-level radioactive-waste burial facility near Beatty, Nevada, for calendar year 1989. Data were collected in support of ongoing studies to estimate the potential for downward movement of radionuclides into the unsaturated sediments beneath waste-burial trenches at the...

Wood, J.L.; Andraski, Brian J.
Selected meteorological data for an arid site near Beatty, Nye County, Nevada, calendar year 1989; 1992; OFR; 92-484; Wood, J. L.; Andraski, B. J.

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Year Published: 1992

Trace metals in clams (Macoma balthica) and sediments at the Palo Alto mudflat in South San Francisco Bay, California; May 1991-May, 1992

No abstract available.

Luoma, S.N.; Cain, D.J.; Brown, C.L.; Hornberger, Michelle
Trace metals in clams (Macoma balthica) and sediments at the Palo Alto mudflat in South San Francisco Bay, California; May 1991-May, 1992; 1992; OFR; 92-456; Luoma, S. N.; Cain, D. J.; Brown, C. L.; Hornberger, Michelle

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Year Published: 1992

Trihalomethane formation potential of Kentucky River water

No abstract available.

Rathbun, R.E.; White, K.D.; Evaldi, R.D.
Trihalomethane formation potential of Kentucky River water; 1992; WRI; 92-4057; Rathbun, R. E.; White, K. D.; Evaldi, R. D.

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Year Published: 1992

Deposition of aerially applied BT in an oak forest and its prediction with the FSCBG model

Data are provided from 17 single-swath aerial spray trials that were conducted over a fully leafed, 16-m tall, mixed oak forest. The distribution of cross-swath spray deposits was sampled at the top of the canopy and below the canopy. Micrometeorological conditions were measured above and within the canopy during the spray trials. The USDA Forest...

Anderson, Dean E.; Miller, David R.; Wang, Yansen; Yendol, William G.; Mierzejewski, Karl; McManus, Michael L.

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Year Published: 1992

Deep-living microbes mount a relentless attack on rock

No abstract available.

Appenzeller, T.

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Year Published: 1992

Microbial control of silicate weathering in organic-rich ground water

An in situ microcosm study of the influence of surface-adhering bacteria on silicate diagenesis in a shallow petroleum-contaminated aquifer showed that minerals were colonized by indigenous bacteria and chemically weathered at a rate faster than theoretically predicted. Feldspar and quartz fragments were placed in anoxic, organic-rich ground water...

Hiebert, Franz K.; Bennett, Philip C.

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Year Published: 1992

A geochemical transport model for redox-controlled movement of mineral fronts in groundwater flow systems: A case of nitrate removal by oxidation of pyrite

A one-dimensional prototype geochemical transport model was developed in order to handle simultaneous precipitation-dissolution and oxidation-reduction reactions governed by chemical equilibria. Total aqueous component concentrations are the primary dependent variables, and a sequential iterative approach is used for the calculation. The model was...

Engesgaard, Peter; Kipp, Kenneth L.

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Year Published: 1992

Modeling biotic uptake by periphyton and transient hyporrheic storage of nitrate in a natural stream

To a convection-dispersion hydrologic transport model we coupled a transient storage submodel (Bencala, 1984) and a biotic uptake submodel based on Michaelis-Menten kinetics (Kim et al., 1990). Our purpose was threefold: (1) to simulate nitrate retention in response to change in load in a third-order stream, (2) to differentiate biotic versus...

Kim, Brian K.A.; Jackman, Alan P.; Triska, Frank J.

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Year Published: 1992

Inductively coupled plasma-mass spectrometry as an element-specific detector for field-flow fractionation particle separation

An inductively coupled plasma-mass spectrometer was used for the quantitative measurement of trace elements In specific,submicrometer size-fraction particulates, separated by sedimentation field-flow fractionation. Fractions were collected from the eluent of the field-flow fractionation centrifuge and nebulized, with a Babington-type pneumatic...

Taylor, Howard E.; Garbarino, John R.; Murphy, Deirdre M.; Beckett, Ronald

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Year Published: 1992

Use of chlorofluorocarbons (CCl3F and CCl2F2) as hydrologic tracers and age‐dating tools: The alluvium and terrace system of central Oklahoma

The use of Chlorofluorocarbons (CFCs) as an age‐dating tool and tracer in shallow groundwaters has been investigated. New methodology for field sampling and preserving groundwaters containing parts per trillion concentrations of the CFCs, F‐1l and F‐12, is presented. Samples are analyzed by purge‐and‐trap gas chromatography with an electron...

Busenberg, Eurybiades; Plummer, Niel