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
Documentation and verification of VST2D; a model for simulating transient, Variably Saturated, coupled water-heat-solute Transport in heterogeneous, anisotropic 2-Dimensional, ground-water systems with variable fluid density Documentation and verification of VST2D; a model for simulating transient, Variably Saturated, coupled water-heat-solute Transport in heterogeneous, anisotropic 2-Dimensional, ground-water systems with variable fluid density
This report describes a model for simulating transient, Variably Saturated, coupled water-heatsolute Transport in heterogeneous, anisotropic, 2-Dimensional, ground-water systems with variable fluid density (VST2D). VST2D was developed to help understand the effects of natural and anthropogenic factors on quantity and quality of variably saturated ground-water systems. The model solves
Authors
Michael J. Friedel
National Irrigation Water Quality Program data-synthesis data base National Irrigation Water Quality Program data-synthesis data base
Under the National Irrigation Water Quality Program (NIWQP) of the U.S. Department of the Interior, researchers investigated contamination caused by irrigation drainage in 26 areas in the Western United States from 1986 to 1993. From 1992 to 1995, a comprehensive relational data base was built to organize data collected during the 26-area investigations. The data base provided the basis...
Authors
Ralph L. Seiler, Joseph P. Skorupa
Evaluation of strontium isotopes as a geochemical tracer in the middle Fork Mineral Creek basin, southwestern Colorado Evaluation of strontium isotopes as a geochemical tracer in the middle Fork Mineral Creek basin, southwestern Colorado
No abstract available.
Authors
P. L. Verplanck, D.M. Unruh, D.L. Fey
Malformed frogs in Minnesota: An update Malformed frogs in Minnesota: An update
No abstract available.
Authors
Donald O. Rosenberry
Soil characteristics and agrichemicals in groundwater of the Midwestern United States Soil characteristics and agrichemicals in groundwater of the Midwestern United States
A comprehensive set of soil characteristics were examined to determine the effect of soil on the transport of agrichemicals to groundwater. This paper examines the relation of soil characteristics to concentrations and occurrence nitrate, atrazine, and atrazine residue from 99 wells completed in unconsolidated aquifers across the Midwestern United States. Soil characteristics that...
Authors
M. Burkart, D.W. Kolpin, R.J. Jaquis, K. Cole
Model coupling intraparticle diffusion/sorption, nonlinear sorption, and biodegradation processes Model coupling intraparticle diffusion/sorption, nonlinear sorption, and biodegradation processes
Diffusion, sorption and biodegradation are key processes impacting the efficiency of natural attenuation. While each process has been studied individually, limited information exists on the kinetic coupling of these processes. In this paper, a model is presented that couples nonlinear and nonequilibrium sorption (intraparticle diffusion) with biodegradation kinetics. Initially, these...
Authors
Hrissi K. Karapanagioti, Chris M. Gossard, Keith A. Strevett, Randall L. Kolar, David A. Sabatini
Fractionation of Fe isotopes by soil microbes and organic acids Fractionation of Fe isotopes by soil microbes and organic acids
Small natural variations in Fe isotopes have been attributed to biological cycling. However, without understanding the mechanism of fractionation, it is impossible to interpret such variations. Here we show that the δ56Fe of Fe dissolved from a silicate soil mineral by siderophore-producing bacteria is as much as 0.8% lighter than bulk Fe in the mineral. A smaller isotopic shift is...
Authors
Susan L. Brantley, Laura Liermann, Thomas D. Bullen
Bacterial respiration of arsenate and its significance in the environment Bacterial respiration of arsenate and its significance in the environment
No abstract available.
Authors
Ronald S. Oremland, Diane Newman, B.W. Kail, J.F. Stolz
Stressor interactions in ecological systems Stressor interactions in ecological systems
No abstract available.
Authors
William Clements, Samuel N. Luoma, Jeroen Gerritsen, A. Hatch, P. Jepson, Trefor B. Reynoldson, R. Thom
Separating stressor influences from environmental variability: Eight case studies from aquatic and terrestrial ecosystems Separating stressor influences from environmental variability: Eight case studies from aquatic and terrestrial ecosystems
No abstract available.
Authors
S.N. Suoma, W.H. Clements, T. DeWitt, Jeroen Gerritsen, A. Hatch, P. Jepson, Trefor B. Reynoldson, Ron Thom
Biogeochemical cycles Biogeochemical cycles
No abstract available.
Authors
H.L. Ehrlich, Ron Oremland, J.P. Zehr
Metal loading in Soda Butte Creek upstream of Yellowstone National Park, Montana and Wyoming; a retrospective analysis of previous research; and quantification of metal loading, August 1999 Metal loading in Soda Butte Creek upstream of Yellowstone National Park, Montana and Wyoming; a retrospective analysis of previous research; and quantification of metal loading, August 1999
Acid drainage from historic mining activities has affected the water quality and aquatic biota of Soda Butte Creek upstream of Yellowstone National Park. Numerous investigations focusing on metals contamination have been conducted in the Soda Butte Creek basin, but interpretations of how metals contamination is currently impacting Soda Butte Creek differ greatly. A retrospective analysis...
Authors
G.K. Boughton