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Page 4982, results 124526 - 124550

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Not all publications have extents, not all extents are completely accurate
Development of a digital model of ground-water flow in deeply weathered crystalline rock, Chester County, Pennsylvania
Laurence J. McGreevy, Ronald A. Sloto
1980, Water-Resources Investigations Report 80-2
The model developed in this study simulates .recharge to, flow through, and discharge from the water-table aquifer in the upper Pickering Creek basin, a 5.98-square-mile basin representative of most of Chester County, Pennsylvania. The two-dimensional finite-difference model of Trescott, Pinder, and Larson was used with slight modification. The way ground-water...
Hydrologic setting of wetlands in the Cottonwood Lake area, Stutsman County, North Dakota
Thomas C. Winter, Mark R. Carr
1980, Water-Resources Investigations Report 80-99
Because of growing interest in the role of lakes and wetlands in the hydrology of the prairie environment, a group of wetlands in the Cottonwood Lake area, Stutsman County, are being instrumented for long-term hydrologic studies. The study site is on a regional topographic high near the eastern edge of...
Plan of study for the Northern Atlantic Coastal Plain Regional Aquifer System Analysis
Harold Meisler
1980, Water-Resources Investigations Report 80-16
Sediments of Cretaceous to Holocene age compose the Northern Atlantic Coastal Plain aquifer system in an area of 50,000 square miles in parts of New York, New Jersey, Delaware, Maryland, Virginia, and North Carolina. The aquifer system is a major source of water supply in the area. About 1.4 billion...
Nutrient yield of the Apalachicola River flood plain, Florida; water-quality assessment plan
H. C. Mattraw Jr., John F. Elder
1980, Water-Resources Investigations Report 80-51
The Apalachicola River in northwestern Florida is the location of one of four current U.S. Geological Survey National River Quality Assessments. The investigation of the Apalachicola River and flood plain is designed to quantify the organic detritus and nutrient yield to the productive, estuarine Apalachicola Bay. The extensive riverine flood...
Ground-water hydrology of the Dade City area, Pasco County, Florida, with emphasis on the hydrologic effects of pumping from the Floridan aquifer
C. H. Tibbals, Warren Anderson, Charles P. Laughlin
1980, Water-Resources Investigations Report 80-33
The Dade City area, northeast Pasco County, Florida, is an area of about 260 square miles. Of the approximately 32 million gallons per day pumped from the Floridan aquifer in the area in 1975, about 16 million gallons per day were pumped from an area of about 0.25 square miles...
Physical environment and hydrologic characteristics of coal-mining areas in Missouri
J. E. Vaill, James H. Barks
1980, Water-Resources Investigations Report 80-67
Hydrologic information for the north-central and western coal-mining regions of Missouri is needed to define the hydrologic system in these areas of major historic and planned coal development. This report describes the physical setting, climate, coal-mining practices, general hydrologic system, and the current (1980) hydrologie data base in these two...
Evaluation of remote hydrologic data-acquisition systems, west-central Florida
J.F. Turner Jr., W. M. Woodham
1980, Water-Resources Investigations Report 79-102
The study provides an evaluation of the hydrologic applications of a land-line and two satellite data-relay systems operated during 1977-78 in the Southwest Florida Water Management District. These systems were tested to evaluate operational and reliability characteristics. Telephone lines were used to relay data in the land-line system, and the...
Ground-water availability near Fort Wayne, Allen County, Indiana
Michael Planert
1980, Water-Resources Investigations Report 80-34
A 3-year study to determine the groundwater potential of confined glacial aquifers in a large part of Allen County, Ind., was begun in July 1974 by the U.S. Geological Survey. Mapping of outwash sands and gravels delineated two distinct layers of sand and gravel in the southern and eastern parts...
Sediment transport of streams tributary to San Francisco, San Pablo, and Suisun Bays, California, 1909-66
George Porterfield
1980, Water-Resources Investigations Report 80-64
A review of historical sedimentation data is presented, results of sediment-data collection for water years 1957-59 are summarized, and long-term sediment-discharge estimates from a preliminary report are updated. Comparison of results based on 3 years of data to those for the 10 water years, 1957-66, provides an indication of the...
Hydrology of selected basins in the Warrior coal field, Alabama — A progress report
Celso Puente, John G. Newton, Thomas J. Hill
1980, Water-Resources Investigations Report 80-22
Hydrologic data are being collected in four basins in the Warrior coal field in Alabama to provide baseline information to aid in determining the effect mining will have on water resources. Basins monitored are in two different geologic and hydrologic environments. Two basins are underlain predominantly by relatively impermeable indurated...
Limnology of Lago Loiza, Puerto Rico
Ferdinand Quinones-Marquez
1980, Water-Resources Investigations Report 79-97
The principal chemical, physical and biological characteristics of Lago Loize, P.R., and its main tributaries were studied from 1973-74. The lake supplies an average of 300,000 cubic meters per day of water to metropolitan San Juan. Flows from Rio Grande de Loize and Rio Gurabo contribute 84.0 percent of the...
Preliminary analysis of regional-precipitation periodicity
Charles A. Perry
1980, Water-Resources Investigations Report 80-74
Precipitation variability plays a major role in nearly every aspect of the hydrologic cycle. Precipitation is not a random event, but it occurs after a sequence of prerequi-sites has been fulfilled. Recent investigations have shown that activity of the sun can affect atmospheric vorticity, an important factor in precipitation formation....
Baseline water quality of Schmidt, Hornbeam, and Horseshoe Lakes, Dakota County, Minnesota
G. A. Payne
1980, Water-Resources Investigations Report 80-3
Three lakes in Dakota County were sampled five times during an 18-month period to determine baseline water quality prior to construction of an interstate highway. Results of physical measurements and chemical analyses showed that the lakes were shallow, nonstratified, and nutrient enriched. Considerable seasonal variations in dissolved solids, nutrient, and...
Analysis of stream quality in the Yampa River Basin, Colorado and Wyoming
Dennis A. Wentz, Timothy Doak Steele
1980, Water-Resources Investigations Report 80-8
Historic data show no significant water-temperature changes since 1951 for the Little Snake or Yampa Rivers, the two major streams of the Yampa River basin in Colorado and Wyoming. Regional analyses indicate that harmonic-mean temperature is negatively correlated with altitude. No change in specific conductance since 1951 was noted for...
Preliminary investigation of a shallow ground-water flow system associated with Connetquot Brook, Long Island, New York
Keith R. Prince
1980, Water-Resources Investigations Report 80-47
Under natural conditions, about 95 percent of the flow in Long Island streams is derived from ground-water seepage. The ground-water system that feeds the streams is a shallow subsystem that overlies the regional subsurface flow system. The Connetquot Brook basin was selected for study because it has not been appreciably...
Ground water in the Piedmont Upland of central Maryland
Claire A. Richardson
1980, Water-Resources Investigations Report 80-18
Aquifers in a 130-square-mile area of the central Maryland and Piedmont, are shown to be the sole or principal source of water. The study area is underlain chiefly by crystalline rocks and partly by unaltered sandstones and siltstones. The groundwater is derived from local precipitation and generally occurs under water-table...
Quality of urban runoff, Tecolote Creek drainage area, San Diego County, California
James G. Setmire, Wesley L. Bradford
1980, Water-Resources Investigations Report 80-70
The quality of storm runoff from a 9.2-square-mile urbanized watershed, Tecolote Creek, San Diego County, Calif., was studied during nine storms from September 1976 through May 1977. Specific conductance reached 2,100 micromhos and total residue concentrations reached 2,770 milligrams per liter. The chemical oxygen demand concentration in 95% of the...
Geohydrology of the Delta-Clearwater area, Alaska
Dorothy E. Wilcox
1980, Water-Resources Investigations Report 80-92
The alluvial aquifer in the Delta-Clearwater area, Alaska, is composed of lenticular, interbedded deposits of silt, sand, and gravel. Ground water occurs under both confined and unconfined conditions in the area. The potentiometric surface slopes approximately northward at gradients ranging from about 1 to 25 feet per mile. The aquifer...
Streamflow characteristics of the Yellowstone River Basin, Montana, through 1976
L. Grady Moore, Ronald R. Shields
1980, Water-Resources Investigations Report 80-41
Statistical summaries of streamflow data for selected stream-gaging and crest-stage gage sites are presented in this report to aid in appraising the hydrology of the Yellowstone River basin, Montana. Streamflow records presented for 45 gaging stations and 45 crest-stage gages for the period of record. Streamflow record collection in the...
Three-dimensional digital-computer model of the Ferron sandstone aquifer near Emery, Utah
Daniel J. Morrissey, Gregory C. Lines, Scott D. Bartholoma
1980, Water-Resources Investigations Report 80-62
A three-dimensional finite-difference computer model of the Ferron sand-stone aquifer was used to simulate ground-water flow in the Emery coal field in east-central Utah. The model also was used to predict the effects of pro-posed surface mining and the resulting mine dewatering on potentiometric sur-faces of the aquifer. The model...
The effects of using ground water to maintain water levels of Cedar Lake, Wisconsin
R.S. McLeod
1980, Water-Resources Investigations Report 80-23
Cedar Lake, a kettle lake with no surface inlet or outlet, was studied to evaluate the feasibility of maintaining water levels of lakes in the glaciated kettle moraine area of eastern Wisconsin by pumping ground water into them. The general hydrogeology of the area around the lake was defined and...