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Page 4944, results 123576 - 123600

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Potentiometric surface map of the Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1979
Charles P. Laughlin, E. C. Hayes, George R. Schiner
1980, Open-File Report 80-69
This map presents the potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity for May 1979. The Floridan aquifer is the principal source of potable water in the area. Water-level measurements were made on approximately 1200 wells and on several springs. The potentiometric...
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...
Bibliography of geology and hydrology, southwestern New Mexico
Ann Finley Wright
1980, Water-Resources Investigations Report 80-20
The southwestern part of New Mexico is recognized as a source of abundant and varied natural resources. This bibliography of over 2,700 references concerned with geology, hydrology, chemistry, and geography has been compiled to assist physical science researchers in their study and development of this region....
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...
Selected chemical quality characteristics in streams of Kentucky, 1970-1975
J.F. Santos
1980, Water-Resources Investigations Report 79-21
Generalized maps of average dissolved solids, hardness and nitrate concentrations of water in streams throughout Kentucky were prepared from data collected at more than 100 sites from 1970 to 1975. Average dissolved solids concentrations seldom exceed 250 milligrams per liter. Hardness, mostly of calcium magnesium origin, generally ranges from 60...
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...
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...
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...
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...
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...
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...
Effects of storm runoff on water quality in the Mill Creek drainage basin, Willingboro, New Jersey
James C. Schornick Jr., David K. Fishel
1980, Water-Resources Investigations Report 80-98
The effect of storm runoff on the quality of water in the the Mill Creek drainage basin in west-central New Jersey is described in this report. The study area (23.7 square kilometers) consists of agricultural and undeveloped land and the residential community of Willingboro. From October 1975 to September 1976,...
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...
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...
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...
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...
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...
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...