Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
Filter Total Items: 3746
Near-Field Receiving Water Monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in South San Francisco Bay, California: 2005
Trace elements in sediment and the clam Macoma petalum (formerly reported as Macoma balthica (Cohen and Carlton 1995)), clam reproductive activity and benthic, macroinvertebrate community structure are reported for a mudflat one kilometer south of the discharge of the Palo Alto Regional Water Quality Control Plant in South San Francisco Bay. This report includes data collected for the period Janua
Authors
Daniel J. Cain, Francis Parcheso, Janet K. Thompson, Samuel N. Luoma, Allison H. Lorenzi, Edward Moon, Michelle K. Shouse, Michelle I. Hornberger, Jessica Dyke
Monitored natural attenuation of chlorinated solvents: Moving beyond reductive dechlorination
Monitored natural attenuation (MNA), while a remedy of choice for many sites, can be challenging when the contaminants are chlorinated solvents. Even with many high-quality technical guidance references available, there continue to be challenges implementing MNA at some chlorinated solvent sites. The U.S. Department of Energy, as one organization facing such challenges, is leading a project that w
Authors
Karen M. Vangelas, Brian B. Looney, Tom O. Early, Tyler Gilmore, Francis H. Chapelle, Karen M. Adams, Claire H. Sink
Freshwater and saline loads of dissolved inorganic nitrogen to Hood Canal and Lynch Cove, western Washington
Hood Canal is a long (110 kilometers), deep (175 meters) and narrow (2 to 4 kilometers wide) fjord of Puget Sound in western Washington. The stratification of a less dense, fresh upper layer of the water column causes the cold, saltier lower layer of the water column to be isolated from the atmosphere in the late summer and autumn, which limits reaeration of the lower layer. In the upper layer of
Authors
Anthony J. Paulson, Christopher P. Konrad, Lonna M. Frans, Marlene Noble, Carol Kendall, Edward G. Josberger, Raegan L. Huffman, Theresa D. Olsen
Quantification of mass loading to Strawberry Creek near the Gilt Edge mine, Lawrence County, South Dakota, June 2003
Although remedial actions have taken place at the Gilt Edge mine in the Black Hills of South Dakota, questions remain about a possible hydrologic connection along shear zones between some of the pit lakes at the mine site and Strawberry Creek. Spatially detailed chemical sampling of stream and inflow sites occurred during low-flow conditions in June 2003 as part of a mass-loading study by the U.S.
Authors
Briant A. Kimball, Robert L. Runkel, Katherine Walton-Day, Joyce E. Williamson
GoPhast: A graphical user interface for PHAST
GoPhast is a graphical user interface (GUI) for the USGS model PHAST. PHAST simulates multicomponent, reactive solute transport in three-dimensional, saturated, ground-water flow systems. PHAST can model both equilibrium and kinetic geochemical reactions. PHAST is derived from HST3D (flow and transport) and PHREEQC (geochemical calculations). The flow and transport calculations are restricted to c
Authors
Richard B. Winston
Effects of spatially variable resolution on field-scale estimates of tracer concentration from electrical inversions using Archie's law
Two important mechanisms affect our ability to estimate solute concentrations quantitatively from the inversion of field-scale electrical resistivity tomography (ERT) data: (1) the spatially variable physical processes that govern the flow of current as well as the variation of physical properties in space and (2) the overparameterization of inverse models, which requires the imposition of a smoot
Authors
Kamini Singha, Steven M. Gorelick
Interactive effects of dissolved zinc and orthophosphate on phytoplankton from Coeur d'Alene Lake, Idaho
Within the longitudinal chemical-concentration gradient in Coeur d'Alene Lake, generated by inputs from the St. Joe and Coeur d'Alene Rivers, two dominant algal species, Chlorella minutissima and Asterionella formosa, were isolated and cultured in chemically defined media to examine growth response to a range of dissolved orthophosphate concentrations and zinc-ion activities representative of the
Authors
James S. Kuwabara, Brent R. Topping, Paul F. Woods, James L. Carter, Stephen W. Hager
Use of the Multi-Node Well (MNW) package when simulating solute transport with the MODFLOW ground-water transport process
This report describes modifications to a U.S. Geological Survey (USGS) three-dimensional solute-transport model (MODFLOW-GWT), which is incorporated into the USGS MODFLOW ground-water model as the Ground-Water Transport (GWT) Process. The modifications were made to create compatibility between the Multi-Node Well (MNW) Package for MODFLOW and the MODFLOW-GWT model. This compatibility improves the
Authors
Leonard F. Konikow, G.Z. Hornberger
Concentration of selected herbicides, herbicide degradation products, and nutrients in the lower Mississippi River, Louisiana, April 1991 through December 2003
No abstract available.
Authors
Elisabeth A. Scribner, Donald A. Goolsby, William A. Battaglin, Michael T. Meyer, E.M. Thurman
MODFLOW-2005, the U.S. Geological Survey modular ground-water model - documentation of shared node local grid refinement (LGR) and the boundary flow and head (BFH) package
This report documents the addition of shared node Local Grid Refinement (LGR) to MODFLOW-2005, the U.S. Geological Survey modular, transient, three-dimensional, finite-difference ground-water flow model. LGR provides the capability to simulate ground-water flow using one block-shaped higher-resolution local grid (a child model) within a coarser-grid parent model. LGR accomplishes this by iterativ
Authors
Steffen W. Mehl, Mary C. Hill
Chapter 1. Determination of elements in natural-water, biota, sediment, and soil samples using collision/reaction cell inductively coupled plasma-mass spectrometry
No abstract available.
Authors
John R. Garbarino, Leslie K. Kanagy, Mark E. Cree
Response to comment on "Accumulation of contaminants in fish from wastewater treatment wetlands"
No abstract available.
Authors
Larry B. Barber, Steffanie H. Keefe, Ronald C. Antweiler, Howard E. Taylor, Roland D. Wass