Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
GeoHEALTH-USGS Newsletter
GeoHEALTH-USGS Newsletter
The GeoHEALTH–USGS Newsletter—published since 2004—provides information on USGS science activities pertinent to safeguarding the health of fish, wildlife, domesticated animals, and people from environmental exposures to contaminants and pathogens.
Featured Science Activities
Featured Science Activities
Lean about our Featured Science Activities through our pages that highlight science studies, publications, and results.
Filter Total Items: 3785
VS2DI-A graphical software package for simulating fluid flow and solute or energy transport in variably saturated porous media VS2DI-A graphical software package for simulating fluid flow and solute or energy transport in variably saturated porous media
No abstract available.
Authors
P. A. Hsieh, W.L. Wingle, R. W. Healy
Forecasting selenium discharges to the San Francisco Bay-Delta Estuary: Ecological effects of a proposed San Luis drain extension Forecasting selenium discharges to the San Francisco Bay-Delta Estuary: Ecological effects of a proposed San Luis drain extension
During the next few years, federal and state agencies may be required to evaluate proposals and discharge permits that could significantly change selenium (Se) inputs to the San Francisco Bay-Delta Estuary (Bay-Delta), particularly in the North Bay (i.e., Suisun Bay and San Pablo Bay). These decisions may include discharge requirements for an extension of the San Luis Drain (SLD) to the...
Authors
Samuel N. Luoma, Theresa S. Presser
Chemical and isotopic composition and gas concentrations of ground water and surface water from selected sites at and near the Idaho National Engineering and Environmental Laboratory, Idaho, 1994-97 Chemical and isotopic composition and gas concentrations of ground water and surface water from selected sites at and near the Idaho National Engineering and Environmental Laboratory, Idaho, 1994-97
No abstract available.
Authors
Eurybiades Busenberg, Niel Plummer, M. W. Doughten, P.K. Widman, R. C. Bartholomay
Nitrogen in the Mississippi Basin--Estimating sources and predicting flux to the Gulf of Mexico Nitrogen in the Mississippi Basin--Estimating sources and predicting flux to the Gulf of Mexico
No abstract available.
Authors
Donald A. Goolsby, William A. Battaglin
Quantifying hydrologic interactions between streams and their subsurface hyporheic zones Quantifying hydrologic interactions between streams and their subsurface hyporheic zones
No abstract available.
Authors
Judson W. Harvey, Brian J. Wagner
Graphical user interface for MODFLOW, Version 4 Graphical user interface for MODFLOW, Version 4
No abstract available.
Authors
Richard B. Winston
Metal exposure to a benthic invertebrate, Hydropsyche californica, in the Sacramento River down stream of Keswick Reservoir, California Metal exposure to a benthic invertebrate, Hydropsyche californica, in the Sacramento River down stream of Keswick Reservoir, California
No abstract available.
Authors
Daniel J. Cain, James L. Carter, Steven V. Fend, Samuel N. Luoma, Charles N. Alpers, Howard E. Taylor
Determining timescales for groundwater flow and solute transport Determining timescales for groundwater flow and solute transport
One of the principal uses of environmental tracers is for determining the ages of soil waters and groundwaters. (We may refer to this as ‘hydrochronology’by analogy with the dating of solid materials known as geochronology.) Information on soil water and groundwater age enables timescales for a range of subsurface processes to be determined. For example, ‘groundwater stratigraphy’is used
Authors
Peter G. Cook, J.K. Bohlke
Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration
Recent research by the U.S. Geological Survey has characterized contaminant sources and identified important geochemical processes that influence transport of radionuclides from uranium mining and milling wastes. 1) Selective extraction studies indicated that alkaline earth sulfates and hydrous ferric oxides are important hosts of 226Ra in uranium mill tailings. The action of sulfate...
Authors
Edward R. Landa, Charles A. Cravotta, David L. Naftz, Philip L. Verplanck, D. Kirk Nordstrom, Robert A. Zielinski
Potential for nonenzymatic reduction of Fe(III) via electron shuttling in subsurface sediments Potential for nonenzymatic reduction of Fe(III) via electron shuttling in subsurface sediments
The potential for various substances to serve as electron shuttles between Fe(III)-reducing microorganisms and insoluble Fe(III) oxides in aquifer sediments was evaluated in order to determine whether abiological mechanisms might play a role in the apparent microbial reduction of Fe(III) in subsurface sediments. Humic substances (humics) and the humics analogue, anthraquinone-2,6...
Authors
Kelly P. Nevin, Derek R. Lovely
First LC/MS determination of cyanazine amide, cyanazine acid, and cyanazine in groundwater samples First LC/MS determination of cyanazine amide, cyanazine acid, and cyanazine in groundwater samples
Cyanazine and two of its major metabolites, cyanazine amide and cyanazine acid, were measured at trace levels in groundwater using liquid chromatography/atmospheric pressure chemical ionization/mass spectrometry (LC/APCI/MS). Solid-phase extraction was carried out by passing 20 mL of groundwater sample through a cartridge containing a polymeric phase (PLRP-s), with recoveries ranging...
Authors
Imma Ferrer, E.M. Thurman, Damia Barcelo