Ionic strength and DOC determinations from various freshwater sources to the San Francisco Bay
Y.R. Hunter, J.S. Kuwabara
1994, Bulletin of Environmental Contamination and Toxicology (52) 311-318
An exact estimation of dissolved organic carbon (DOC) within the salinity gradient of zinc and copper metals is significant in understanding the limit to which DOC could influence metal speciation. A low-temperature persulfate/oxygen/ultraviolet wet oxidation procedure was utilized for analyzing DOC samples adapted for ionic strength from major freshwater sources...
Isolation, growth, and metabolism of an obligately anaerobic, selenate- respiring bacterium, strain SES-3
Ronald S. Oremland, Jodi S. Blum, Charles W. Culbertson, P.T. Visscher, Laurence G. Miller, P. Dowdle, F.E. Strohmaier
1994, Applied and Environmental Microbiology (60) 3011-3019
A gram-negative, strictly anaerobic, motile vibrio was isolated from a selenate-respiring enrichment culture. The isolate, designated strain SES-3, grew by coupling the oxidation of lactate to acetate plus CO2 with the concomitant reduction of selenate to selenite or of nitrate to ammonium. No growth was observed on sulfate or selenite, but...
The feasibility of recharge rate determinations using the steady-state centrifuge method
J. R. Nimmo, David A. Stonestrom, K.C. Akstin
1994, Soil Science Society of America Journal (58) 49-56
The establishment of steady unsaturated flow in a centrifuge permits accurate measurement of small values of hydraulic conductivity (K). This method can provide a recharge determination if it is applied to an unsaturated core sample from a depth at which gravity alone drives the flow. A K value determined at the in...
Modeling the effects of climate change on water resources - a review
G.H. Leavesley
1994, Climatic Change (28) 159-177
Hydrologic models provide a framework in which to conceptualize and investigate the relationships between climate and water resources. A review of current studies that assess the impacts of climate change using hydrologic models indicates a number of problem areas common to the variety of models applied. These problem areas include...
Determination of alachlor and its sulfonic acid metabolite in water by solid-phase extraction and enzyme-linked immunosorbent assay
D.S. Aga, E.M. Thurman, M.L. Pomes
1994, Analytical Chemistry (66) 1495-1499
No abstract available. ...
Global Positioning System surveying to monitor land subsidence in Sacramento Valley, California, USA
M. E. Ikehara
1994, Hydrological Sciences Journal (39) 417-429
A subsidence research program began in 1985 to document the extent and magnitude of land subsidence in Sacramento Valley, California, an area of about 15 600 km2, using Global Positioning System (GPS) surveying. A brief description of GPS surveying is followed by a summary of each of four surveys between...
'The Kesterson effect'
T. S. Presser
1994, Environmental Management (18) 437-454
Hypothesized to be derived from Cretaceous marine sedimentary rocks, selenium contamination of the Kesterson National Wildlife Refuge is traced through irrigation drainage to the source bedrock of the California Coast Ranges. This biogeochemical pathway of selenium is defined here as the 'Kesterson effect.' At the refuge ponds, this effect culminated...
The effect of a confining unit on the geochemical evolution of ground water in the Upper Floridan aquifer system
C.M. Wicks, J.S. Herman
1994, Journal of Hydrology (153) 139-155
In west-central Florida, sections of the Upper Floridan aquifer system range in character from confined to leaky to unconfined. The confining unit is the Hawthorn Formation, a clay-rich sequence. The presence or absence of the Hawthorn Formation affects the geochemical evolution...
Assessment of nonpoint-source contamination of the High Plains Aquifer in south-central Kansas, 1987
John O. Helgesen, Lloyd E. Stullken, A. T. Rutledge
1994, Water Supply Paper 2381-C
Ground-water quality was assessed in a 5,000-square-mile area of the High Plains aquifer in south-central Kansas that is susceptible to nonpoint-source contamination from agricultural and petroleum-production activities. Of particular interest was the presence of agricultural chemicals and petroleum-derived hydrocarbons that might have been associated with brines that formerly were disposed...
Geohydrology and simulated ground-water flow in an irrigated area of northwestern Indiana
L. D. Arihood, M.E. Basch
1994, Water-Resources Investigations Report 92-4046
Water for irrigation in parts of Newton and Jasper Counties and adjacent areas of northwestern Indiana is pumped mostly from the carbonate- bedrock aquifer that underlies glacial drift. To help in managing the ground-water resources of the area, a three-dimensional ground-water model was developed and tested with hydrologic data collected...
National Water-Quality Assessment (NAWQA) Program, Long Island-New Jersey (LINJ) Coastal Drainages Study Unit : Scope of the Long Island-New Jersey Coastal Drainages Study-Unit investigation
Mark A. Ayers
1994, Fact Sheet 030-94
Scope of the Long Island-New Jersey Coastal Drainages Study-Unit InvestigationIn 1991, the U.S. Geological Survey (USGS) began a National Water-Quality Assessment (NAWQA) Program to document the status of and trends in quality of a large representative part of the Nation's water resources and to provide a sound scientific understanding of...
Hydraulic properties of a fractured-rock aquifer, Lee Valley, San Diego County, California
Charles A. Kaehler, Paul A. Hsieh
1994, Water Supply Paper 2394
No abstract available....
Potential effects of the Hawaii Geothermal Project on ground-water resources on the island of Hawaii
M.L. Sorey, E.M. Colvard
1994, Water-Resources Investigations Report 94-4028
In 1990, the State of Hawaii proposed the Hawaii Geothermal Project for the development of as much as 500 MW of electric power from the geothermal system in the East Rift Zone of Kilauea Volcano. This report uses data from 31 wells and 8 springs to describe the properties of...
Pore-water extraction from unsaturated tuff by triaxial and one-dimensional compression methods, Nevada Test Site, Nevada
Timothy E. Mower, Jerry D. Higgins, In C. Yang, Charles A. Peters
1994, Water-Resources Investigations Report 93-4144
Study of the hydrologic system at Yucca Mountain, Nevada, requires the extraction of pore-water samples from welded and nonwelded, unsaturated tuffs. Two compression methods (triaxial compression and one-dimensional compression) were examined to develop a repeatable extraction technique and to investigate the effects of the extraction method on the original pore-fluid...
Herbicides and nitrate in near-surface aquifers in the midcontinental United States, 1991
Dana W. Kolpin, Michael R. Burkart, E. Michael Thurman
1994, Water Supply Paper 2413
The occurrence and distribution of selected herbicides, atrazine metabolites, and nitrate were determined for near-surface aquifers (within 50 feet of land surface) in the corn- and soybean-producing region of the midcontinental United States. The study region included all or parts of Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North...
Ground-water-quality assessment of the Central Oklahoma Aquifer, Oklahoma; analysis of available water-quality data through 1987
David L. Parkhurst, Scott C. Christenson, Jamie L. Schlottmann
1994, Water Supply Paper 2357-B
No abstract available....
National Water-Quality Assessment (NAWQA) Program, Long Island-New Jersey (LINJ) Coastal Drainages Study Unit
Paul E. Stackelberg, Mark A. Ayers
1994, Fact Sheet 012-94
In 1991, the U.S. Geological Survey (USGS) began its National Water-Quality Assessment (NAWQA ) program to (1) document the quality of a large, representative part of the Nation's water resources; (2) define water-quality trends; and (3) identify major factors that affect water quality. In addressing these goals, the program will...
Operation of hydrologic data-collection stations by the U.S. Geological Survey in 1993
Alberto Condes de la Torre
1994, Open-File Report 94-84
Water-resources activities in New England, fiscal year 1993
M.F. Orlando
1994, Open-File Report 94-339
The U.S. Geological Survey has 82 active or complete-except-report projects of hydrologic investigations ongoing within the New England Program Area. Of this total, 23 are data projects. Data projects contain statistics and data on the conditions of surface water, ground water, water quality and (or) water use for the study...
Black Hills hydrology study
D.G. Driscoll
1994, Open-File Report 94-344
The Black Hills area of western South Dakota is a valuable resource center. The area has attracted numerous residents and industries because of the availability of mineral, timber, agricultural, recreational, and water resources. The water resources of the area have been stressed locally by increasing population, periodic drought, and...
Ground-water resources of southern Tangipahoa Parish and adjacent areas, Louisiana
T.R. Rapp
1994, Water-Resources Investigations Report 92-4182
Groundwater resources in southern Tangipahoa Parish and adjacent areas were studied to determine their potential for development as an alternative to the Mississippi River as a water-supply source for Jefferson Parish. Eight major aquifers consisting of thick sand units that underlie the study area are, in descending order: (1) shallow,...
Development of historic and synthesized unregulated streamflow for the James River in North Dakota and South Dakota, 1983-91
Douglas G. Emerson, Colin A. Niehus
1994, Water-Resources Investigations Report 94-4018
Operation of the Garrison Diversion Unit may have some affect on the hydrology of the James River in North Dakota and South Dakota. The Garrison Diversion Unit Monthly Operations Model was developed to analyze a wide range of streamflow conditions that could occur in the James River Basin. The purpose...
Lithologic descriptions of two cores and ground-water-quality data from five counties in the northeastern part of the coastal plain of South Carolina, 1988 and 1991
W. F. Falls
1994, Open-File Report 94-58
This report presents data collected as part of a hydrologic investigation of Darlington, Dillon, Florence, Marion, and Marlboro Counties in the northeastern part of the Coastal Plain of South Carolina. These data include lithologic descriptions of sediment recovered from two continuously cored boreholes and water-quality results for samples collected from...
U. S. Geological Survey Federal-State Cooperative Water-Resources Program Fiscal Year 1993
B.K. Gilbert
1994, Open-File Report 94-325
The Federal-State Cooperative Program is a part- nership between the U.S. Geological Survey and State and local agencies. It provides a balanced approach to the study and resolution of water- related problems and to acquiring hydrologic data. The principal program objectives are to: (1) collect, on a systematic basis, data...
Bibliography of publications from the Toxic Substances Hydrology Program, U.S. Geological Survey
David W. Morganwalp
1994, Open-File Report 94-91
The U.S. Geological Survey began the Toxic Substances Hydrology Program in 1982 to study, in an interdisciplinary atmosphere, the fate and effects of toxic substances in the environment. The objective of the Program is to provide the earth-science information needed to prevent or mitigate contamination of the Nation's ground and surface waters. To...
