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
Learn about our Featured Science Activities through our pages that highlight studies, publications, and results.
Filter Total Items: 4098
Diagnosing the flood of 1997 in San Francisco Bay with observations and model results Diagnosing the flood of 1997 in San Francisco Bay with observations and model results
No abstract available.
Authors
Noah Knowles, Daniel Cayan, Reginald J. Uncles, Lynn Ingram, Dave Peterson
Advective-transport observation (ADV) package, a computer program for adding advective-transport observations of steady-state flow fields to the three-dimensional ground-water-flow parameter-estimation model MODFLOWP Advective-transport observation (ADV) package, a computer program for adding advective-transport observations of steady-state flow fields to the three-dimensional ground-water-flow parameter-estimation model MODFLOWP
No abstract available.
Authors
Evan R. Anderman, Mary Catherine Hill
Documentation of R-UNSAT, a computer model for the simulation of reactive, multispecies transport in the unsaturated zone Documentation of R-UNSAT, a computer model for the simulation of reactive, multispecies transport in the unsaturated zone
No abstract available.
Authors
Matthew A. Lahvis, Arthur L. Baehr
Integrity of production wells and confining unit at the Naval Weapons Industrial Reserve Plant, Dallas, Texas, 1995 Integrity of production wells and confining unit at the Naval Weapons Industrial Reserve Plant, Dallas, Texas, 1995
Ground water in the shallow alluvial aquifer is contaminated at the Naval Weapons Industrial Reserve Plant, Dallas, Texas. Five production wells at the site are cased through the alluvial aquifer and underlying units and are screened in either the Paluxy or Twin Mountains aquifers. Three abandoned wells, originally completed in the Twin Mountains aquifer but filled with drilling mud in...
Authors
Sonya A. Jones, Frederick L. Paillet
PHREEQCI: A graphical user interface for the geochemical computer program PHREEQC PHREEQCI: A graphical user interface for the geochemical computer program PHREEQC
PhreeqcI is a Windows-based graphical user interface for the geochemical computer program PHREEQC. PhreeqcI provides the capability to generate and edit input data files, run simulations, and view text files containing simulation results, all within the framework of a single interface. PHREEQC is a multipurpose geochemical program that can perform speciation, inverse, reaction-path, and...
Authors
Scott R. Charlton, Clifford L. Macklin, David L. Parkhurst
Are walleye from Lake Roosevelt contaminated with mercury? Are walleye from Lake Roosevelt contaminated with mercury?
To find out, scientists from the U. S. Geological Survey (USGS) tested walleye and other sport fish from the upper Columbia River and Franklin D. Roosevelt Lake (Lake Roosevelt), the largest reservoir in Washington and a popular fishing spot. Findings: Walleye had higher concentrations of mercury than other sport fish. Larger walleye had higher mercury concentrations than smaller walleye...
Authors
Martha L. Erwin, Mark D. Munn
Effect of tributary inflows on the distribution of trace metals in fine- grained bed sediments and benthic insects of the Clark Fork River, Montana Effect of tributary inflows on the distribution of trace metals in fine- grained bed sediments and benthic insects of the Clark Fork River, Montana
The effect of tributary inflows on metal concentrations in
Authors
E.V. Axtmann, D.J. Cain, S. N. Luoma
Bacterial oxidation of methyl bromide in Mono Lake, California Bacterial oxidation of methyl bromide in Mono Lake, California
The oxidation of methyl bromide (MeBr) in the water column of Mono Lake, CA, was studied by measuring the formation of H14CO3 from [14C]MeBr. Potential oxidation was detected throughout the water column, with highest rates occurring in the epilimnion (5-12 m depth). The oxidation of MeBr was eliminated by filter-sterilization, thereby demonstrating the involvement of bacteria. Vertical...
Authors
T.L. Connell, S.B. Joye, L.G. Miller, R.S. Oremland
Borehole sampling of fracture populations - compensating for borehole sampling bias in crystalline bedrock aquifers, Mirror Lake, Grafton County, New Hampshire Borehole sampling of fracture populations - compensating for borehole sampling bias in crystalline bedrock aquifers, Mirror Lake, Grafton County, New Hampshire
The clustering of orientations of hydraulically conductive fractures in bedrock at the Mirror Lake, New Hampshire fractured rock study site was investigated by comparing the orientations of fracture populations in two subvertical borehole arrays with those mapped on four adjacent subvertical roadcuts. In the boreholes and the roadcuts, the orientation of fracture populations appears very...
Authors
G.D. McDonald, Frederick L. Paillet, C.C. Barton, C. D. Johnson
Quantifying macropore recharge: Examples from a semi-arid area Quantifying macropore recharge: Examples from a semi-arid area
The purpose of this paper is to illustrate the significantly increased resolution of determining macropore recharge by combining physical, chemical, and isotopic methods of analysis. Techniques for quantifying macropore recharge were developed for both small-scale (1 to 10 km2) and regional-scale areas in and semi-arid areas. The Southern High Plains region of Texas and New Mexico was...
Authors
W.W. Wood, Ken A. Rainwater, D.B. Thompson
Mixed-mode sorption of hydroxylated atrazine degradation products to sell: A mechanism for bound residue Mixed-mode sorption of hydroxylated atrazine degradation products to sell: A mechanism for bound residue
This study tested the hypothesis that sorption of hydroxylated atrazine degradation products (HADPs: hydroxyatrazine, HA; deethylhydroxyatrazine, DEHA; and deisopropylhydroxyatrazine, DIHA) to soils occurs by mixed-mode binding resulting from two simultaneous mechanisms: (1) cation exchange and (2) hydrophobic interaction. The objective was to use liquid chromatography and soil...
Authors
R.N. Lerch, E.M. Thurman, E.L. Kruger