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Page 3178, results 79426 - 79450

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Ground-water quality and vulnerability to contamination in selected agricultural areas of southeastern Michigan, northwestern Ohio, and northeastern Indiana
Mary Ann Thomas
2000, Water-Resources Investigations Report 2000–4146
Ground-water quality was assessed in the northeastern part of the Corn Belt, where tile-drained row crops are underlain by fractured glacial till. Data were collected from 30 shallow monitor wells and 18 co-located domestic wells as part of the U.S. Geological Survey’s National Water- Quality Assessment in the Lake Erie-Lake...
Status and trends in suspended-sediment discharges, soil erosion, and conservation tillage in the Maumee River basin: Ohio, Michigan, and Indiana
Donna N. Myers, Kevin D. Metzker, Steven Davis
2000, Water-Resources Investigations Report 2000–4091
The relation of suspended-sediment discharges to conservation-tillage practices and soil loss were analyzed for the Maumee River Basin in Ohio, Michigan, and Indiana as part of the U.S. Geological Survey’s National Water-Quality Assessment Program. Cropland in the basin is the largest contributor to soil erosion and suspended-sediment discharge to the...
Water-quality and ground-water-level trends, 1990-99, and data collected from 1995 through 1999, East Mountain area, Bernalillo County, central New Mexico
D.R. Rankin
2000, Open-File Report 2000-476
Bernalillo County officials recognize the importance of monitoring water quality and ground-water levels in rapidly developing areas. For this reason, water-quality and ground-water- level data were collected from 87 wells, 3 springs, and the Ojo Grande Acequia in the east mountain area of Bernalillo County between January 1990 and June 1999....
Principal facts for gravity stations in the vicinity of San Bernardino, Southern California
Megan L. Anderson, Carter W. Roberts, Robert C. Jachens
2000, Open-File Report 2000-193
New gravity measurements in the vicinity of San Bernardino, California were collected to help define the characteristics of the Rialto-Colton fault. The data were processed using standard reduction formulas and parameters. Rock properties such as lithology, magnetic susceptibility and density also were measured at several locations. Rock property measurements will...
Interactive 3-D visualization: A tool for seafloor navigation, exploration and engineering
L. A. Mayer, M. Paton, L. Gee, S. V. Gardner, C. Ware
2000, Conference Paper, OCEANS 2000 MTS/IEEE conference and exhibition. Conference proceedings
Recent years have seen remarkable advances in sonar technology, positioning capabilities, and computer processing power that have revolutionized the way we image the seafloor. The massive amounts of data produced by these systems present many challenges but also offer tremendous opportunities in terms of visualization and analysis. The authors have...
Hydrogeology and simulation of ground-water flow at Dover Air Force Base, Delaware
Kurt C. Hinaman, Frederick J. Tenbus
2000, Water-Resources Investigations Report 99-4224
Dover Air Force Base in Kent County, Delaware, has many contaminated sites that are in active remediation. To assist in this remediation, a steady-state model of ground-water flow was developed to aid in understanding the hydrology of the system, and for use as a ground-watermanagement tool. This report describes the...
The relation of fish community composition to riparian cover and runoff potential in the Minnesota River basin, Minnesota and Iowa, 1997
Paul E. Hanson
2000, Fact Sheet 105-00
The relation of fish community composition to riparian cover and runoff potential was investigated in 20 streams in the Minnesota River Basin during the summer of 1997 as part of the U.S. Geological Survey’s National Water-Quality Assessment (NAWQA) Program (fig.1). Analysis of variance statistics indicated significant differences in the composition...
Water-quality assessment of part of the Upper Mississippi River Basin, Minnesota and Wisconsin - Ground-water quality in an agricultural area of Sherburne County, Minnesota, 1998
James F. Ruhl, Alison L. Fong, Paul E. Hanson, William J. Andrews
2000, Water-Resources Investigations Report 2000-4107
The quality of shallow ground water in a 75-mi2 agricultural area of the Anoka Sand Plain aquifer in central Minnesota is described as part of the National Water Quality Assessment (NAWQA) Program - a national-scale assessment of the quality of water resources within large study units in various hydrologic settings....
Sea floor topography and backscatter intensity of the Historic Area Remediation Site (HARS), offshore of New York, based on multibeam surveys conducted in 1996, 1998, and 2000
Bradford Butman, W. W. Danforth, S.C. Knowles, Brian May, Laurie Serrett
2000, Open-File Report 2000-503
An area offshore of Sandy Hook, New Jersey, has been used extensively for disposal of dredged and other materials, derived from the New York/New Jersey Harbor and surrounding areas, since the late 1800's (Figure 1). Between 1976 and 1995, the New York Bight Dredged Material Disposal Site, also known as...
Nutrients and suspended sediment in snowmelt runoff from part of the Upper Mississippi River Basin, Minnesota and Wisconsin, 1997
James D. Fallon, Ryan P. McNellis
2000, Water-Resources Investigations Report 2000-4165
The U.S. Geological Survey sampled snowmelt runoff from 42 stream sites during March and April 1997 in part of the Upper Mississippi River Basin, Minnesota and Wisconsin, to characterize nutrient and suspended-sediment concentrations, yields, and loads. Ancillary data from 12 sites provided data to estimate constituent loads delivered during snowmelt...
Use of biological characteristics of common carp (Cyprinus carpio) to indicate exposure to hormonally active agents in selected Minnesota streams, 1999
Kathy Lee, Vicki Blazer, Nancy D. Denslow, Robert M. Goldstein, Philip J. Talmage
2000, Water-Resources Investigations Report 2000-4202
The presence of hormonally active agents (HAAs) was determined in selected Minnesota streams using biological characteristics (measures of endocrine disruption) of common carp (Cyprinus carpio) exposed to wastewater treatment plant (WWTP) effluent and runoff from agricultural and forested land. Four biological characteristics of common carp were used as indicators of...
Water quality of lakes in Voyageurs National Park, northern Minnesota, 1999
Gregory A. Payne
2000, Water-Resources Investigations Report 2000-4281
Water-quality samples were collected during July 1999 from selected lakes and bays, and the mouths of two rivers that flow into Voyageurs National Park in northern Minnesota. Results of laboratory analyses and field measurements of chemical and physical properties were compared to similar data collected during 1977-83. Water-quality data were...
Pesticides in streams in part of the Upper Mississippi River Basin, Minnesota and Wisconsin, 1974-94
James D. Fallon
2000, Fact Sheet 066-00
Analysis of historical pesticide information by the National Water-Quality Assessment (NAWQA) Program indicates that land use and pesticide use affect detections of pesticides in streams in part of the Upper Mississippi River Basin (UMIS). Agricultural pesticide use was greatest in the Minnesota River Basin. Greater than twenty-seven times more herbicides...
Water-quality assessment of part of the Upper Mississippi River Basin, Minnesota and Wisconsin - Ground-water quality in three different land-use areas, 1996-98
Alison L. Fong
2000, Water-Resources Investigations Report 2000-4131
The surficial sand and gravel aquifer is susceptible to effects from land-use in the Upper Mississippi River Basin study unit of the National Water-Quality Assessment (NAWQA) Program. The purpose of this report is to describe the ground-water quality and the assessment of how different land-uses affect the shallow ground-water quality...
Map and database of Quaternary faults and folds in Colombia and its offshore regions
Gabriel Paris, Michael N. Machette, Richard L. Dart, Kathleen M. Haller
2000, Open-File Report 2000-284
As part of the International Lithosphere Program’s “World Map of Major Active Faults,” the U.S. Geological Survey (USGS) is assisting in the compilation of a series of digital maps of Quaternary faults and folds in Western Hemisphere countries. The maps show the locations, ages, and activity rates of major earthquake-related...