G.Z. Hornberger, Leonard F. Konikow
1998, Open-File Report 98-188
No abstract available....
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Publication Extents
Not all publications have extents, not all extents are completely accurateE.A. Scribner, D. A. Goolsby, T.E. Michael, W.A. Battaglin
1998, Open-File Report 98-181
No abstract available....
Leonard F. Konikow, W. E. Sanford
1998, Water Resources Research (34) 2779-2780
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...
Jennifer G. Savoie, Denis R. LeBlanc
1998, Water-Resources Investigations Report 97-4269
No abstract available....
George A. Desborough, Paul H. Briggs, Nilah Mazza, Rhonda Driscoll
1998, Open-File Report 98-364
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...
Robert T. Anderson, Juliette N. Rooney-Varga, Catherine V. Gaw, Derek R. Lovley
1998, Environmental Science & Technology (32) 1222-1229
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...
Paul Bradley, James Landmeyer, Richard S. Dinicola
1998, Applied and Environmental Microbiology (64) 1560-1562
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....
S. Newman, J. Schuette, James B. Grace, K. Rutchey, T. Fontaine, K.R. Reddy, M. Pietrucha
1998, Aquatic Botany (60) 265-280
Since the early 1900s, the Everglades have been influenced by anthropogenic actions including altered hydrology and increased nutrient loading. In the northern Everglades an apparent effect of these disturbances has been the development and proliferation of dense cattail (Typha spp. ) stands in areas previously dominated by sawgrass (Cladium jamaicense Crantz) and...
Mahalingam Ravichandran, George R. Aiken, Michael M. Reddy, Joseph N. Ryan
1998, Environmental Science & Technology (32) 3305-3311
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...
Robert J. Gilliom, David K. Mueller, Lisa H. Nowell
1998, Open-File Report 97-589
The National Water-Quality Assessment is based on intensive investigations of stream and ground-water quality in selected major hydrologic basins (study units) of the United States. One objective of the national assessment is to comparatively evaluate water-quality conditions within and among the different study units. Methods were developed to compare the...
James L. Mason, Kenneth L. Kipp
1998, Professional Paper 1585
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...
Andrew M. O’Reilly
1998, Water-Resources Investigations Report 97-4199
Wastewater reclamation and reuse has become increasingly popular as water agencies search for alternative water-supply and wastewater-disposal options. Several governmental agencies in central Florida currently use the land-based application of reclaimed water (wastewater that has been treated beyond secondary treatment) as a management alternative to surface-water disposal of wastewater. Water...
Randall W. Conger
1998, Open-File Report 98-62
Twenty-one wells were drilled at Crossley Farms Superfund Site between December 15, 1987, and May 1, 1988, to define and monitor the horizontal and vertical distribution of ground-water contamination emanating from a suspected contaminant source area (Blackhead Hill). Eight well clusters were drilled on or near the Crossley Site and...
R.W. Carmody, Niel Plummer, Eurybiades Busenberg, T.B. Coplen
1998, Open-File Report 97-234
No abstract available. ...
Jill Baron, M.D. Hartman, Timothy G.F. Kittel, L.E. Band, D. S. Ojima, R.B. Lammers
1998, Ecological Applications (8) 1037-1051
Over one-third of the land area in the South Platte Basin of Colorado, Nebraska, and Wyoming, has been converted to croplands. Irrigated cropland now comprises 8% of the basin, while dry croplands make up 31%. We used the RHESSys model to compare the changes in plant productivity and vegetation-related hydrological...
Warren C. Day, Robert P. Dickerson, Christopher J. Potter, Donald S. Sweetkind, Carma A. San Juan, Ronald M. Drake II, Christopher J. Fridrich
1998, IMAP 2627
Yucca Mountain, Nye County, Nevada, has been identified as a potential site for underground storage of high-level radioactive nuclear waste. Detailed bedrock geologic maps form an integral part of the site characterization program by providing the fundamental framework for research into the geologic hazards and hydrologic behavior of the mountain....
Robert L. Wershaw, K. R. Kennedy, J.E. Henrich
1998, Book chapter, Humic substances structures, properties, and uses
No abstract available. ...
Thomas C. Pierson
1998, Bulletin of Volcanology (60) 98-109
Travel times for wet volcanic mass flows (debris avalanches and lahars) can be forecast as a function of distance from source when the approximate flow rate (peak discharge near the source) can be estimated beforehand. The near-source flow rate is primarily a function of initial flow volume, which should be...
James G. Brown, R. L. Bassett, Pierre D. Glynn
1998, Journal of Hydrology (209) 225-250
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...
Jesus Rodriguez-Martinez, R.T. Richards
1998, Conference Paper, Proceedings : tropical hydrology and Caribbean water resources : Third International Symposium on Tropical Hydrology, and Fifth Caribbean Islands Water Resources Congress
T.H. Wiedemeier, M.A. Swanson, D.E. Moutoux, E.K. Gordon, J.T. Wilson, B.H. Wilson, D.H. Kampbell, P.E. Haas, R.N. Miller, J.E. Hansen, Francis H. Chapelle
1998, Report
This Protocol is designed to evaluate the fate in ground water of chlorinated aliphatic hydrocarbons and/or fuel hydrocarbons. Documentation of natural attenuation requires detailed site characterization. The data collected under this protocol can be used to compare the relative effectiveness of other remedial options. and natural attenuation. This protocol should...
Thomas C. Winter, Judson W. Harvey, O. Lehn Franke, William M. Alley
1998, Circular 1139
The importance of considering ground water and surface water as a single resource has become increasingly evident. Issues related to water supply, water quality, and degradation of aquatic environments are reported on frequently. The interaction of ground water and surface water has been shown to be a significant concern in...
Kathleen A. McCarthy, Michael R. Lilly, Joan F. Braddock, Larry D. Hinzman
1998, Open-File Report 98-198
Natural attenuation processes include biological degradation, by which microorganisms break down contaminants into simpler product compounds; adsorption of contaminants to soil particles, which decreases the mass of contaminants dissolved in ground water; and dispersion, which decreases dissolved contaminant concentrations through dilution. The primary objectives of this study are to (1)...
George A. Desborough, Paul H. Briggs, Nilah Mazza
1998, Open-File Report 98-40
No abstract available....
Joseph D. White, Steven W. Running, Peter E. Thornton, Robert E. Keane, Kevin C. Ryan, Daniel B. Fagre, Carl H. Key
1998, Ecological Applications (8) 805-823
Glacier National Park served as a test site for ecosystem analyses that involved a suite of integrated models embedded within a geographic information system. The goal of the exercise was to provide managers with maps that could illustrate probable shifts in vegetation, net primary production (NPP), and hydrologic responses associated...