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: 3746
Reply to comment by E. Holzbecher on "Constant-concentration boundary condition: Lessons from the HYDROCOIN variable-density groundwater benchmark problem"
We appreciate the opportunity to continue a dialogue on solute-transport modeling issues and perhaps to clarify some of our original concerns. It appears to us that Holzbecher [this issue] fails to consider the physical implications of groundwater flow and solute transport along no-flow boundaries. A no-flow boundary coincides with a streamline along which the fluid velocity is generally nonzero.
Authors
Leonard F. Konikow, W. E. Sanford
Water-quality data and methods of analysis for samples collected near a plume of sewage-contaminated ground water, Ashumet Valley, Cape Cod, Massachusetts, 1993-94
No abstract available.
Authors
Jennifer G. Savoie, Denis R. LeBlanc
Addition of MOC3D solute-transport model capability to the U.S. Geological Survey MODFLOW-96 graphical-user interface using Argus open numerical environments
No abstract available.
Authors
G.Z. Hornberger, Leonard F. Konikow
A reconnaissance for selected herbicides, metabolites, and nutrients in streams of nine Midwestern States, 1994-95
No abstract available.
Authors
E.A. Scribner, D. A. Goolsby, T.E. Michael, W.A. Battaglin
Acid-neutralizing potential of minerals in intrusive rocks of the Boulder batholith in northern Jefferson County, Montana
Experimental studies show that fresh granitic rocks of the Boulder batholith in the
Boulder River headwaters near Basin, Montana have significant acid-neutralizing
potential and are capable of neutralizing acidic water derived from metal-mining related
wastes or mine workings. Laboratory studies show that in addition to the acidneutralizing
potential (ANP) of minor amounts of calcite in these
Authors
George A. Desborough, Paul H. Briggs, Nilah Mazza, Rhonda Driscoll
Anaerobic benzene oxidation in the Fe(III) reduction zone of petroleum-contaminated aquifers
The potential for anaerobic benzene oxidation in the Fe(III)-reduction zone of petroleum-contaminated aquifers was evaluated. Sediments were incubated under strict anaerobic conditions without any amendments in order to simulate in situ conditions. [14C]Benzene was not oxidized to 14CO2 at most sites examined, which is consistent with previous studies that have found that benzene tends to persist
Authors
Robert T. Anderson, Juliette N. Rooney-Varga, Catherine V. Gaw, D. R. Lovley
Anaerobic oxidation of [1,2-14C]dichloroethene under Mn(IV)-reducing conditions
Anaerobic oxidation of [1,2-14C]dichloroethene to14CO2 under Mn(IV)-reducing conditions was demonstrated. The results indicate that oxidative degradation of partially chlorinated solvents like dichloroethene can be significant even under anoxic conditions and demonstrate the potential importance of Mn(IV) reduction for remediation of chlorinated groundwater contaminants.
Authors
Paul Bradley, James Landmeyer, Richard S. Dinicola
Enhanced dissolution of cinnabar (mercuric sulfide) by dissolved organic matter isolated from the Florida Everglades
Organic matter isolated from the Florida Everglades caused a dramatic increase in mercury release (up to 35 μM total dissolved mercury) from cinnabar (HgS), a solid with limited solubility. Hydrophobic (a mixture of both humic and fulvic) acids dissolved more mercury than hydrophilic acids and other nonacid fractions of dissolved organic matter (DOM). Cinnabar dissolution by isolated organic matte
Authors
Mahalingam Ravichandran, George R. Aiken, Michael M. Reddy, Joseph N. Ryan
Methods for collection of dissolved sulfate and sulfide and analysis of their sulfur isotopic composition
No abstract available.
Authors
R.W. Carmody, Niel Plummer, Eurybiades Busenberg, T. B. Coplen
Hydrology of the Bonneville Salt Flats, northwestern Utah, and simulation of ground-water flow and solute transport in the shallow-brine aquifer
This report describes the hydrologic system of the Bonneville Salt Flats with emphasis on the mechanisms of solute transport. Variable-density, three-dimensional computer simulations of the near-surface part of the ground-water system were done to quantify both the transport of salt dissolved in subsurface brine that leaves the salt-crust area and the salt dissolved and precipitated on the land su
Authors
James L. Mason, Kenneth L. Kipp
Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. II. Changes in leaf composition after senescence
No abstract available.
Authors
Robert L. Wershaw, K. R. Kennedy, J.E. Henrich
Analysis and simulation of reactive transport of metal contaminants in ground water in Pinal Creek Basin, Arizona
Large-scale mining activities have generated a plume of acidic ground water more than 15 km long in the regional aquifer of the Pinal Creek Basin. A one-dimensional reactive-transport model was developed using PHREEQC to aid in the analysis of transport and chemical processes in the plume and to determine the uses and limitations of this type of modeling approach. In 1984, the acidic part of the p
Authors
James G. Brown, R. L. Bassett, Pierre D. Glynn