Critical evaluation and selection of standard state thermodynamic properties for chromium metal and its aqueous ions, hydrolysis species, oxides, and hydroxides
James W. Ball, D. Kirk Nordstrom
1998, Journal of Chemical & Engineering Data (43) 895-918
This review critically evaluates the reported thermodynamic data on chromium metal, oxides, hydroxides, free aqueous ions, and hydrolysis species. Several discrepancies and inconsistencies have been uncovered and resolved to improve equilibrium calculations for chemical modeling and related engineering purposes. A revised set of data is derived from evaluation of electrochemical...
Geologic controls on the formation of lakes in north-central Florida
Jack L. Kindinger, Jeffrey B. Davis, James G. Flocks
Janet K. Pitman, Alan R. Carroll, editor(s)
1998, Report, Modern and Ancient Lake Systems: New Problems and Perspectives, 1998
Fluid exchange between surficial waters and groundwater, as well as the processes that control this exchange, are of critical concern to water management districts and planners. Digital high-resolution seismic systems were used to collect geophysical data from 30 lakes of north-central Florida. Although using seismic profile data in the past...
Seasonal variation in habitat use by marsh fishes
F. Jordan, K. J. Babbitt, C. C. McIvor
1998, Ecology of Freshwater Fish (7) 159-166
We used I-m2 throw traps to examine habitat use by smallsized fishes within a mosaic of wet prairies and sloughs in the headwaters of the St. Johns River, Florida between August 1992 and November 1995. Estimates of total fish density and biomass varied temporally, but did not differ significantly between...
Reply to comment by E. Holzbecher on "Constant-concentration boundary condition: Lessons from the HYDROCOIN variable-density groundwater benchmark problem"
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...
Hydrologic investigation of the Ophir Creek watershed near Yakutat, Alaska
Edward G. Neal
1998, Open-File Report 98-199
Data on streamflow and ground-water levels were collected in the Ophir Creek watershed in southeast Alaska to obtain information about the relations between streamflow, ground-water levels, and precipitation. In addition, the possible effect of an experimental channel excavation to increase flows in Ophir Creek was evaluated. Stream discharges were monitored...
Acid-neutralizing potential of minerals in intrusive rocks of the Boulder batholith in northern Jefferson County, Montana
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...
Addition of MOC3D solute-transport model capability to the U.S. Geological Survey MODFLOW-96 graphical-user interface using Argus open numerical environments
G.Z. Hornberger, Leonard F. Konikow
1998, Open-File Report 98-188
No abstract available....
A reconnaissance for selected herbicides, metabolites, and nutrients in streams of nine Midwestern States, 1994-95
E.A. Scribner, D. A. Goolsby, T.E. Michael, W.A. Battaglin
1998, Open-File Report 98-181
No abstract available....
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
Jennifer G. Savoie, Denis R. LeBlanc
1998, Water-Resources Investigations Report 97-4269
No abstract available....
Mass balance, meteorological, ice motion, surface altitude, and runoff data at Gulkana Glacier, Alaska, 1994 balance year
Rod S. March
1998, Water-Resources Investigations Report 97-4251
The 1994 measured winter snow, maximum winter snow, net, and annual balances in the Gulkana Glacier basin were evaluated on the basis of meteorological, hydrological, and glaciological data obtained in the basin. Averaged over the glacier, the measured winter snow balance was 1.34 meters on April 29, 1994, 0.9 standard...
Anaerobic benzene oxidation in the Fe(III) reduction zone of petroleum-contaminated aquifers
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...
Anaerobic oxidation of [1,2-14C]dichloroethene under Mn(IV)-reducing conditions
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....
Factors influencing cattail abundance in the northern Everglades
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...
Enhanced dissolution of cinnabar (mercuric sulfide) by dissolved organic matter isolated from the Florida Everglades
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...
Hydrogeology and simulation of the effects of reclaimed-water application in west Orange and southeast Lake counties, Florida
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...
Effects of landcover, water redistribution, and temperature on ecosystem processes in the South Plate Basin
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...
Bedrock geologic map of the Yucca Mountain area, Nye County, Nevada
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....
Methods for comparing water-quality conditions among National Water-Quality Assessment Study Units, 1992-1995
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...
Hydrology of the Bonneville Salt Flats, northwestern Utah, and simulation of ground-water flow and solute transport in the shallow-brine aquifer
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...
Methods for collection of dissolved sulfate and sulfide and analysis of their sulfur isotopic composition
R.W. Carmody, Niel Plummer, Eurybiades Busenberg, T.B. Coplen
1998, Open-File Report 97-234
No abstract available. ...
Evaluation of geophysical logs, phase I, for Crossley Farms Superfund Site, Berks County, Pennsylvania
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...
Use of 13C NMR and FTIR for elucidation of degradation pathways during natural litter decomposition and compositing. II. Changes in leaf composition after senescence
Robert L. Wershaw, K. R. Kennedy, J.E. Henrich
1998, Book chapter, Humic substances structures, properties, and uses
No abstract available. ...
An empirical method for estimating travel times for wet volcanic mass flows
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...
Analysis and simulation of reactive transport of metal contaminants in ground water in Pinal Creek Basin, Arizona
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...
Detection of conduit-controlled ground- water flow at selected sites in northwestern Puerto Rico
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
