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Page 4925, results 123101 - 123125

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Rainfall-runoff relationships and water-quality assessment of Coon Creek watershed, Anoka County, Minnesota
A.D. Arntson, L. H. Tornes
1985, Water-Resources Investigations Report 84-4013
Rainfall-runoff relationships and results of water-quality analyses were studied to develop an understanding of flooding problems and to assess present and potential water-quality problems in the 96.9-square-mile Coon Creek watershed, Anoka County, Minnesota. Rainfall, runoff, and water-quality data were collected from March 1979 to November 1980 at five continuously recording...
Effects of coal mining on the water quality and sedimentation of Lake Tuscaloosa and selected tributaries, North River basin, Alabama
E. F. Cole
1985, Water-Resources Investigations Report 84-4310
Lake Tuscaloosa, a reservoir on North River, is the primary source of water supply for the city of Tuscaloosa, Alabama, and surrounding areas. Between October 1982 and September 1983, 14 sites in the North River basin were sampled to determine if surface coal mining has impacted the quality of water...
Hydrogeology of the southwestern part of the Town of Hempstead, Nassau County, New York
R.K. Krulikas
1985, Water-Resources Investigations Report 85-4288
The groundwater resources of the southwestern part of the Town of Hempstead in Nassau County, NY were investigated in 1984. The area studied encompasses 85 sq mi, or 68% of the town 's 125-sq mi area. The groundwater reservoir underlying the area consists of unconsolidated gravel, sand, silt, and clay...
The hydrologic bench-mark program; a standard to evaluate time-series trends in selected water-quality constituents for streams in Georgia
G. R. Buell, S.C. Grams
1985, Water-Resources Investigations Report 84-4318
Significant temporal trends in monthly pH, specific conductance, total alkalinity, hardness, total nitrite-plus-nitrite nitrogen, and total phosphorus measurements at five stream sites in Georgia were identified using a rank correlation technique, the seasonal Kendall test and slope estimator. These sites include a U.S. Geological Survey Hydrologic Bench-Mark site, Falling Creek...
Effects of sanitary sewers on ground-water levels and streams in Nassau and Suffolk Counties, New York; part 2: Development and application of southwest Suffolk County model
H. T. Buxton, T. E. Reilly
1985, Water-Resources Investigations Report 83-4209
By 1990, sanitary sewers in Nassau County Sewage Disposal Districts 2 and 3 and Suffolk County Southwest Sewer District will discharge to the ocean 140 cu ft of water/sec that would otherwise be returned to the groundwater system through septic tanks and similar systems. To evaluate the effects of this...
Estimating average base flow at low-flow partial-record stations on the south shore of Long Island, New York
H. T. Buxton
1985, Water-Resources Investigations Report 84-4240
Base flows of the 29 major streams in southeast Nassau and southwest Suffolk Counties, New York, were statistically analyzed to discern the correlation among flows of adjacent streams. Concurrent base-flow data from a partial-record and a nearby continuous-record station were related; the data were from 1968-75, a period near hydrologic...
Evaluation of techniques for mapping land and crops irrigated by center pivots from computer-enhanced Landsat imagery in part of the James River basin near Huron, South Dakota
K.E. Kolm
1985, Water-Resources Investigations Report 85-4021
The objective of this study was to evaluate remote sensing techniques for mapping irrigated crop types and acreages in part of the James River basin of South Dakota, using Landsat imagery. The results demonstrated that a subtraction (band 7 minus band 4) method was best for identifying the location of...
Quality of the Arkansas River and irrigation-return flows in the lower Arkansas River Valley, Colorado
Doug Cain
1985, Water-Resources Investigations Report 84-4273
Irrigation-return flows in the lower Arkansas River valley of Colorado were investigated using one-time data at 59 sites, monthly data at 4 sites, and intensive data in a small irrigated area. Specific conductance of return flows increased downstream, paralleling specific conductance of irrigation water. During July 1977, Arkansas River streamflow...
Summary of northern Atlantic Coastal Plain hydrology and its relation to disposal of high-level radioactive waste in buried crystalline rock – A preliminary appraisal
O. B. Lloyd, J. D. Larson, R. W. Davis
1985, Water-Resources Investigations Report 85-4146
Interpretation of available hydrologic data suggests that some areas beneath the Coastal Plain in the States of Delaware, Maryland, New Jersey, North Carolina, and Virginia might have some potential for the disposal of nuclear waste in crystalline rock that is buried beneath the Coastal Plain sediments. The areas of major...
Cost-effectiveness of the stream-gaging program in North Carolina
R.R. Mason, N.M. Jackson
1985, Water-Resources Investigations Report 85-4036
This report documents the results of a study of the cost-effectiveness of the stream-gaging program in North Carolina. Data uses and funding sources are identified for the 146 gaging stations currently operated in North Carolina with a budget of $777,600 (1984). As a result of the study, eleven stations are...
Development and calibration of a two-dimensional digital model for the analysis of the ground-water flow system in the San Antonio Creek Valley, Santa Barbara County, California
Peter Martin
1985, Water-Resources Investigations Report 84-4340
A two-dimensional finite-difference model was used to simulate ground-water flow conditions in San Antonio Creek valley. The model was calibrated to simulate steady-state conditions as approximated by ground-water conditions in 1943 and transient conditions during the period 1944-77. The transmissivity of the aquifer and the vertical hydraulic conductivity of the...