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
CFC tracing of groundwater in fractured rock aided with 14C and 3H to identify water mixing CFC tracing of groundwater in fractured rock aided with 14C and 3H to identify water mixing
No abstract available.
Authors
A.S. Talma, John L. Weaver, L.N. Plummer, Eurybiades Busenberg
The study of humic substances--In search of a paradigm The study of humic substances--In search of a paradigm
No abstract available.
Authors
Robert L. Wershaw
Nitrate isotopes in groundwater systems Nitrate isotopes in groundwater systems
Nitrate contamination, often associated with agricultural activities, is a major problem in some shallow aquifers and is increasingly becoming a threat to groundwater supplies (Gillham and Cherry, 1978; Ronen et al., 1983; Spalding and Exner, 1991). The intake of high levels of nitrate can cause methemoglobinemia in infants, and there is substantial evidence collected from animal...
Authors
Carol Kendall, Ramon Aravena
Enhanced levels of zinc in drinking water adversely affect spatial learning in rats Enhanced levels of zinc in drinking water adversely affect spatial learning in rats
No abstract available.
Authors
J.M. Flinn, J. Morgan, J. Magaha, L. Krause, K. Navarrete, B.F. Jones
Contaminant sorption by soil and bed sediment: Is there a difference? Contaminant sorption by soil and bed sediment: Is there a difference?
No abstract available.
Authors
C. T. Chiou, D. E. Kile
Estimation of hydraulic parameters from an unconfined aquifer test conducted in a glacial outwash deposit, Cape Cod, Massachusetts Estimation of hydraulic parameters from an unconfined aquifer test conducted in a glacial outwash deposit, Cape Cod, Massachusetts
An aquifer test conducted in a sand and gravel, glacial outwash deposit on Cape Cod, Massachusetts was analyzed by means of a model for flow to a partially penetrating well in a homogeneous, anisotropic unconfined aquifer. The model is designed to account for all significant mechanisms expected to influence drawdown in observation piezometers and in the pumped well. In addition to the...
Authors
A.F. Moench, Stephen P. Garabedian, Denis R. LeBlanc
Documentation of a computer program to simulate lake-aquifer interaction using the MODFLOW ground water flow model and the MOC3D solute-transport model Documentation of a computer program to simulate lake-aquifer interaction using the MODFLOW ground water flow model and the MOC3D solute-transport model
Heads and flow patterns in surficial aquifers can be strongly influenced by the presence of stationary surface-water bodies (lakes) that are in direct contact, vertically and laterally, with the aquifer. Conversely, lake stages can be significantly affected by the volume of water that seeps through the lakebed that separates the lake from the aquifer. For these reasons, a set of computer
Authors
Michael L. Merritt, Leonard F. Konikow
Monthly variability and possible sources of nitrate in ground water beneath mixed agricultural land use, Suwannee and Lafayette Counties, Florida Monthly variability and possible sources of nitrate in ground water beneath mixed agricultural land use, Suwannee and Lafayette Counties, Florida
In an area of mixed agricultural land use in Suwannee and Lafayette Counties of northern Florida, water samples were collected monthly from 14 wells tapping the Upper Floridan aquifer during July 1998 through June 1999 to assess hydrologic and land-use factors affecting the variability in nitrate concentrations in ground water. Unusually high amounts of rainfall in September and October...
Authors
Brian G. Katz, J.K. Böhlke
Hydrogeologic characterization of six sites in southeastern Minnesota using borehole flowmeters and other geophysical logs Hydrogeologic characterization of six sites in southeastern Minnesota using borehole flowmeters and other geophysical logs
No abstract available.
Authors
Frederick L. Paillet, James Lundy, Robert Tipping, Anthony Runkel, Laurel Reeves, Jeffrey Green
Aerobic microbial mineralization of dichloroethene as sole carbon substrate Aerobic microbial mineralization of dichloroethene as sole carbon substrate
Microorganisms indigenous to the bed sediments of a black- water stream utilized 1,2-dichloroethene (1,2-DCE) as a sole carbon substrate for aerobic metabolism. Although no evidence of growth was observed in the minimal salts culture media used in this study, efficient aerobic microbial mineralization of 1,2-DCE as sole carbon substrate was maintained through three sequential transfers...
Authors
P. M. Bradley, F. H. Chapelle
Age of irrigation water in ground water from the Eastern Snake River Plain Aquifer, south-central Idaho Age of irrigation water in ground water from the Eastern Snake River Plain Aquifer, south-central Idaho
Stable isotope data (2H and 18O) were used in conjunction with chlorofluorocarbon (CFC) and tritium/helium-3 (3H/3He) data to determine the fraction and age of irrigation water in ground water mixtures from farmed parts of the Eastern Snake River Plain (ESRP) Aquifer in south-central Idaho. Two groups of waters were recognized: (1) regional background water, unaffected by irrigation and...
Authors
Niel Plummer, M.G. Rupert, E. Busenberg, P. Schlosser