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Page 5413, results 135301 - 135325

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Not all publications have extents, not all extents are completely accurate
Hydrologic effects of stress-relief fracturing in an Appalachian Valley
Granville G. Wyrick, James W. Borchers
1981, Water Supply Paper 2177
A hydrologic study at Twin Falls State Park, Wyoming County, West Virginia, was made to determine how fracture systems affect the occurrence and movement of ground water in a typical valley of the Appalachian Plateaus Physiographic Province. Twin Falls was selected because it is generally unaffected by factors that would...
Digital seismograms of aftershocks of the Imperial Valley, California, earthquake of October 15, 1979
Joe B. Fletcher, Ricardo L. Zepeda, David M. Boore
1981, Open-File Report 81-655
This report presents the digital seismograms collected for the aftershocksof the Imperial Valley, California earthquake (ML = 6.6) that occurred onL October 15, 1979. A short summary follows that describes the field procedures, instrumentation, and routine computer analysis that was used to produce the ground motion time histories. Boore and...
Computer simulation of the steady-state flow system of the Tertiary limestone (Floridan) aquifer system in east-central Florida
C. H. Tibbals
1981, Open-File Report 81-681
The predevelopment steady-state ground-water flow system for 13 ,700 square miles of the Tertiary limestone aquifer system (known as the Florida aquifer in Florida) in east-central Florida is simulated by means of a digital computer model. The model results indicate that about 1,900 cubic feet per second recharges the aquifer...
Potentiometric surface of the Floridan Aquifer, Southwest Florida Water Management District, May 1981
D. K. Yobbi, W. M. Woodham, George R. Schiner
1981, Open-File Report 81-1006
A May 1981 potentiometric-surface map of the Southwest Florida Water Management District depicts the annual low water-level period. Potentiometric levels decreased 10 to 45 feet between September 1980 and May 1981 in the citrus and farming sections of southern Hillsborough, northern Hardee, southwestern Polk, northwestern DeSoto, and Manatee Counties. Water...
Potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1981
George R. Schiner, E. C. Hayes
1981, Open-File Report 82-118
This map presents the potentiometric surface of the Floridan acquifer in the St. Johns River Water Management District and vicinity for September 1981. The Floridan acquifer is the principal source of potable water in the area. Water-level measurements were made on approximately 1,000 wells and on several springs. The potentiometric...
Quality of surface water in the coal-mining areas of western Maryland and adjacent areas of Pennsylvania and West Virginia from April 1979 to June 1980
W. W. Staubitz
1981, Open-File Report 81-812
The U.S. Geological Survey is studying the water quality of streams within the Eastern Coal Province. This report contains streamflow, water-quality, and biologic data collected in the North Branch Potomac River basin and in the Maryland portion of the Youghiogheny and Casselman River basins. Data collected from 64 streams from...