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
Processes governing phytoplankton blooms in estuaries. II: The role of horizontal transport Processes governing phytoplankton blooms in estuaries. II: The role of horizontal transport
The development and distribution of phytoplankton blooms in estuaries are functions of both local conditions (i.e. the production-loss balance for a water column at a particular spatial location) and large-scale horizontal transport. In this study, the second of a 2-paper series, we use a depth-averaged hydrodynamic-biological model to identify transport-related mechanisms impacting...
Authors
L.V. Lucas, Jeffrey R. Koseff, Stephen G. Monismith, J. E. Cloern, J.K. Thompson
Spatial variability of turbulent fluxes in the roughness sublayer of an even-aged pine forest Spatial variability of turbulent fluxes in the roughness sublayer of an even-aged pine forest
The spatial variability of turbulent flow statistics in the roughness sublayer (RSL) of a uniform even-aged 14 m (= h) tall loblolly pine forest was investigated experimentally. Using seven existing walkup towers at this stand, high frequency velocity, temperature, water vapour and carbon dioxide concentrations were measured at 15.5 m above the ground surface from October 6 to 10 in 1997...
Authors
G. Katul, C.-I. Hsieh, D. Bowling, K. Clark, N. Shurpali, A. Turnipseed, J. Albertson, K. Tu, D. Hollinger, B. M. Evans, B. Offerle, D. Anderson, D. Ellsworth, C. Vogel, R. Oren
Characterizing hydrology and the importance of ground-water discharge in natural and constructed wetlands Characterizing hydrology and the importance of ground-water discharge in natural and constructed wetlands
Although considered the most important component for the establishment and persistence of wetlands, hydrology has been hard to characterize and linkages between hydrology and other environmental conditions are often poorly understood. In this work, methods for characterizing a wetland’s hydrology from hydrographs were developed, and the importance of ground water to the physical and...
Authors
Randall J. Hunt, John F. Walker, David P. Krabbenhoft
Discharge of herbicides from the Mississippi River Basin to the Gulf of Mexico, 1991-97 Discharge of herbicides from the Mississippi River Basin to the Gulf of Mexico, 1991-97
No abstract available.
Authors
Gregory M. Clark, Donald A. Goolsby
User's guide to PHREEQC (Version 2): A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations User's guide to PHREEQC (Version 2): A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
PHREEQC version 2 is a computer program written in the C programming language that is designed to perform a wide variety of low-temperature aqueous geochemical calculations. PHREEQC is based on an ion-association aqueous model and has capabilities for (1) speciation and saturation-index calculations; (2) batch-reaction and one-dimensional (1D) transport calculations involving reversible...
Authors
David L. Parkhurst, C.A.J. Appelo
Quantification of metal loading in French Gulch, Summit County, Colorado, using a tracer-injection study, July 1996 Quantification of metal loading in French Gulch, Summit County, Colorado, using a tracer-injection study, July 1996
No abstract available.
Authors
Briant A. Kimball, Robert L. Runkel, Linda J. Gerner
Tracing and dating young ground water Tracing and dating young ground water
No abstract available.
Authors
Niel Plummer, Linda C. Friedman
Feasibility of using ground water as a supplemental supply for Brooklyn and Queens, New York Feasibility of using ground water as a supplemental supply for Brooklyn and Queens, New York
No abstract available.
Authors
H. T. Buxton, D. A. Smolensky, P. K. Shernoff
Factors controlling elevated lead concentrations in water samples from aquifer systems in Florida Factors controlling elevated lead concentrations in water samples from aquifer systems in Florida
Concentrations of total lead (Pb) and dissolved Pb exceeded the U.S. Environmental Protection Agency action level of 15 micrograms per liter (mg/L) in approximately 19 percent and 1.3 percent, respectively, of ground-water samples collected during 1991-96 from a statewide network of monitoring wells designed to delineate background water quality of Florida's major aquifer systems...
Authors
B. G. Katz, M.P. Bullen, T.D. Bullen, Paul Hansard
Design and analysis of tracer tests to determine effective porosity and dispersivity in fractured sedimentary rocks, Newark Basin, New Jersey Design and analysis of tracer tests to determine effective porosity and dispersivity in fractured sedimentary rocks, Newark Basin, New Jersey
No abstract available.
Authors
Glen B. Carleton, Claire Welty, Herbert T. Buxton
Processing of seismic tomography data collected at Tunnel 160, Deglen Mountain, Kazakhstan Processing of seismic tomography data collected at Tunnel 160, Deglen Mountain, Kazakhstan
No abstract available.
Authors
Karl Ellefsen, William Leith
Analytical results for 35 mine-waste tailings cores and six bed sediment samples, and an estimate of the volume of contaminated materials at Buckeye meadow on upper Basin Creek, northern Jefferson County, Montana Analytical results for 35 mine-waste tailings cores and six bed sediment samples, and an estimate of the volume of contaminated materials at Buckeye meadow on upper Basin Creek, northern Jefferson County, Montana
Metal-mining related wastes in the Boulder River basin study area in northern Jefferson County, Montana have been implicated in their detrimental effects on water quality with regard to acid-generation and toxic-metal solubilization. Flotation-mill tailings in the meadow below the Buckeye mine, hereafter referred to as the Buckeye mill-tailings site, have been identified as significant
Authors
David L. Fey, Stan E. Church, Christopher J. Finney