Quantifying hydrologic interactions between streams and their subsurface hyporheic zones
Judson W. Harvey, Brian J. Wagner
Jeremy B. Jones, Patrick J. Mulholland, editor(s)
2000, Book chapter, Streams and ground waters
No abstract available. ...
Metal exposure to a benthic invertebrate, Hydropsyche californica, in the Sacramento River down stream of Keswick Reservoir, California
Daniel J. Cain, James L. Carter, Steven V. Fend, Samuel N. Luoma, Charles N. Alpers, Howard E. Taylor
2000, Open-File Report 98-654
No abstract available....
The Phosphoria Formation at the Hot Springs Mine in Southeast Idaho: A source of selenium and other trace elements to surface water, ground water, vegetation, and biota
David Z. Piper, J. P. Skorupa, T. S. Presser, M. A. Hardy, S. J. Hamilton, M. Huebner, R. A. Gulbrandsen
2000, Open-File Report 2000-50
Major-element oxides and trace elements in the Phosphoria Formation at the Hot Springs Mine, Idaho were determined by a series of techniques. In this report, we examine the distribution of trace elements between the different solid components aluminosilicates, apatite, organic matter, opal, calcite, and dolomite that largely make up the...
Hydrology of the Columbia Plateau regional aquifer system, Washington, Oregon, and Idaho
H. H. Bauer, Arnold J. Hansen Jr.
2000, Water-Resources Investigations Report 96-4106
Graphical user interface for MODFLOW, Version 4
Richard B. Winston
2000, Open-File Report 2000-315
No abstract available....
Geohydrology of the shallow aquifers in the Fort Lupton-Gilcrest area, Colorado
Stanley G. Robson, Janet S. Heiny, L. R. Arnold
2000, Hydrologic Atlas 746-C
Urban areas commonly rely on ground water for at least part of the municipal water supply, and as population increases, urban areas expand and require larger volumes of water. However, the expansion of an urban area can reduce ground-water availability. This may occur through processes of depletion (withdrawal of most...
Data and applications for study of the water cycle in Africa
James Verdin
2000, Conference Paper
There are a number data set development, data dissemination, and applications activities at the U.S. Geological Survey (USGS) that contribute to the study of the water cycle in Africa. Some of these stem from global change research initiatives, while others are the result of technical assistance provided to international...
Geohydrology of the shallow aquifers in the Boulder-Longmont area, Colorado
Stanley G. Robson, Janet S. Heiny, L. R. Arnold
2000, Hydrologic Atlas 746-D
Urban areas commonly rely on ground water for at least part of the municipal water supply, and as population increases, urban areas expand and require larger volumes of water. However, the expansion of an urban area can reduce ground-water availability. This may occur through processes of depletion (withdrawal of most...
Simulation of nitrous oxide and nitric oxide emissions from tropical primary forests in the Costa Rican Atlantic Zone
Shu-Guang Liu, William A. Reiners, Michael Keller, Davis S. Schimel
2000, Environmental Modelling and Software (15) 727-743
Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases participating in the regulation of global climate and environment. Predictive models on the emissions of N2O and NO emissions from soil into the atmosphere are required. We modified the CENTURY model (Soil Sci. Soc. Am. J., 51...
Effects of animal feeding operations on water resources and the environment; proceedings of the technical meeting, Fort Collins, Colorado, August 30-September 1, 1999
Franceska D. Wilde, L. J. Britton, C.V. Miller, D.W. Kolpin
2000, Open-File Report 2000-204
No abstract available....
Water-quality assessment of the Eastern Iowa Basins: Hydrologic and biologic data, October 1996 through September 1998
Kimberlee K. Akers, Denise L. Montgomery, Daniel E. Christiansen, Mark E. Savoca, Douglas J. Schnoebelen, Kent Becher, Eric M. Sadorf
2000, Open-File Report 2000-67
Hydrologic and biologic data collected from October 1996 through September 1998 in the Eastern Iowa Basins study unit of the U.S. Geological Survey National Water-Quality Assessment Program are presented in this report. Monthly data collected from 12 sites on rivers and streams included measurements of physical properties and determinations of...
Stable hydrogen and oxygen isotope ratios for selected sites of the U.S. Geological Survey's NASQAN and benchmark surface-water networks
Tyler B. Coplen, Carol Kendall
2000, Open-File Report 2000-160
Increasingly, hydrologic studies require information on the isotopic composition of natural waters. This report presents stable hydrogen (delta2H) and oxygen isotope ratios (delta18O) from 391 selected sites of the U.S. Geological Survey's National Stream Quality Accounting Network (NASQAN) and BENCHMARK surface water networks collected during the years 1984-1987. Depth-integrated samples...
Water-quality data for streams in the Boulder River Watershed, Jefferson County, Montana
David A. Nimick, Thomas E. Cleasby
2000, Open-File Report 2000-99
Chemical data were collected in the Boulder River watershed of southwestern Montana during 1996-99 as part of a detailed interdisciplinary study characterizing the effects of historical inactive mines on streams in the watershed. This report presents water-quality data collected by the U.S. Geological Survey for physical properties, major ions, nutrients,...
Geohydrology and numerical simulation of groundwater flow in the central Virgin River Basin of Iron and Washington Counties, Utah
V.M. Heilweil, G. W. Freethey, C.D. Wilkowske, Bernard J. Stolp, Dale E. Wilberg
2000, Technical Publication 116
Because rapid growth of communities in Washington and Iron Counties, Utah, is expected to cause an increase in the future demand for water resources, a hydrologic investigation was done to better understand ground-water resources within the central Virgin River basin. This study focused on two of the principal ground-water reservoirs...
Forces dictating colloidal interactions between viruses and soil
Sandip Chattopadhyay, Robert W. Puls
2000, Chemosphere (41) 1279-1286
The fate and transport of viruses in soil and aquatic environments were studied with respect to the different forces involved in the process of sorption of these viruses on soil particles. In accordance with the classical DLVO theory, we have calculated the repulsive electrostatic forces and the attractive van der...
Selected hydrologic data, through water year 1998, Black Hills Hydrology Study, South Dakota
Daniel G. Driscoll, Wendell L. Bradford, Michael J. Moran
2000, Open-File Report 2000-70
This report presents water-level and water-quality data that have been collected or compiled, through water year 1998, for the Black Hills Hydrology Study. This study is a long-term coop-erative effort between the U.S. Geological Survey, the South Dakota Department of Environment and Natural Resources, and the West Dakota Water Development...
Preliminary release of scientific reports on the acidic drainage in the Animas River watershed, San Juan County, Colorado
S. E. Church
2000, Open-File Report 2000-34
No abstract available....
check_picks_x: A program for checking the travel time picks of crosswell seismic and radar data
Karl Ellefsen
2000, Open-File Report 2000-109
No abstract available....
Analytical results for total-digestions, EPA-1312 leach, and net acid production for twenty-three abandoned metal-mining related wastes in the Boulder River watershed, northern Jefferson County, Montana
David L. Fey, George A. Desborough, Christopher J. Finney
2000, Open-File Report 2000-114
IntroductionMetal-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 during snow melt and storm water runoff events. This degradation of water quality is defined chiefly by...
Mercury studies in the Florida Everglades
David P. Krabbenhoft
2000, Fact Sheet 166-96
Public concern for wildlife and human health problems due to mercury (Hg) toxicity has increased substantially since the mid-1980's. These concerns are manifested primarily by the issuance of fish consumption advisories in the majority of U.S. states, Canada, and several European countries because of high levels of mercury in game...
Ecosystem history of Biscayne Bay and the southeast coast
Scott E. Ishman
2000, Fact Sheet 145-96
OverviewThe U.S. Geological Survey is participating in a multi-institutional effort to assess, monitor, and restore the ecosystem of South Florida. Federal, State and local agencies are collaborating to establish a firm scientific basis for land management and water policy issues. Historical changes in South Florida related to rapid population growth...
Relationships among sea-floor structure and benthic communities in Long Island Sound at regional and benthoscape scales
Roman N. Zajac, Ralph S. Lewis, Larry J. Poppe, David C. Twichell, Joseph Vozarik, Mary L. DiGiacomo-Cohen
2000, Journal of Coastal Research (16) 627-640
Long Island Sound is comprised of a rich and spatially heterogeneous mix of sea-floor environments which provide habitat for an equally diverse set of assemblages of soft-sediment communities. Information from recent research on the geomorphological and chemical attributes of these environments, as well as from studies of the hydrodynamics of...
Ecogeochemistry of the subsurface food web at pH 0–2.5 in Iron Mountain, California, U.S.A.
Eleanora I. Robbins, Teresa M. Rodgers, Charles N. Alpers, D. Kirk Nordstrom
2000, Hydrobiologia (433) 15-23
Pyrite oxidation in the underground mining environment of Iron Mountain, California, has created the most acidic pH values ever reported in aquatic systems. Sulfate values as high as 120 000 mg l−1 and iron as high as 27 600 mg l−1 have been measured in the mine water, which also...
Contrasting patterns of habitat use by prawns and crayfish in a headwater marsh of the St. Johns River, Florida
Frank Jordan, Kimberly J. Babbitt, Carole C. McIvor, Steven J. Miller
2000, Journal of Crustacean Biology (20) 769-776
We compared seasonal patterns of habitat use by the prawn Palaemonetes paludosus and the crayfish Procambarus alleni in Blue Cypress Marsh Conservation Area, Florida. Prawn densities were similar to those found in other oligotrophic wetlands of southern Florida, whereas crayfish densities were much greater than reported previously for other wetlands...
Nutrient pollution of coastal rivers, bays, and seas
Robert Howarth, Donald Anderson, James Cloern, Chris Elfring, Charles Hopkinson, Brian Lapointe, Tom Malone, Nancy Marcus, Karen McGlathery, Andrew N. Sharpley, Dan Walker
2000, Issues in Ecology (7) 1-15
Over the past 40 years, antipollution laws have greatly reduced discharges of toxic substances into our coastal waters. This effort, however, has focused largely on point-source pollution of industrial and municipal effluent. No comparable effort has been made to restrict the input of nitrogen (N) from municipal effluent, nor to...
