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Page 5424, results 135576 - 135600

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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...
Use of flow-duration curves to evaluate effects of urbanization on streamflow patterns on Long Island, New York
Keith R. Prince
1981, Water-Resources Investigations Report 80-114
Streamflow patterns on Long Island, N.Y., have been changing over the last three decades in response to eastward population growth and urbanization. Flow-duration curves for nine streams in Nassau and Suffolk Counties indicate that, during this time, streams in urbanized areas have had increased peak flows and decreased base flows,...
Floods in Maine, April-May 1979
Richard A. Fontaine, C. Richard Haskell
1981, Water-Resources Investigations Report 81-68
Heavy rainfall during April 27-30, 1979, resulted in moderate to record flooding in much of northern and western Maine. During this period, rainfall totals of as much as 6 inches were measured. This period was preceded by up to 10 days of seasonally warm temperatures and snowmelt, which helped create...
Identification codes for organizations listed in computerized data systems of the U.S. Geological Survey
Melvin D. Edwards, Beverly M. Myers
1981, Open-File Report 81-904
This report contains codes for the identification of public and private organizations listed in computerized data systems. These codes are used by the U.S. Geological Survey 's National Water Data Exchange (NAWDEX), National Water Data Storage and Retrieval System (WATSTORE), National Cartographic Information Center (NCIC), and Office of Water Data...
Annotated bibliography of remote sensing methods for monitoring desertification
A. S. Walker, Charles J. Robinove
1981, Circular 851
Remote sensing techniques are valuable for locating, assessing, and monitoring desertification. Remotely sensed data provide a permanent record of the condition of the land in a format that allows changes in land features and condition to be measured. The annotated bibliography of 118 items discusses remote sensing methods that may...
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...
Erodibility of selected soils and estimates of sediment yields in the San Juan Basin, New Mexico
Rebecca M. Summer
1981, Water-Resources Investigations Report 81-44
Onsite rainfall-simulation experiments were conducted to derive field-erodibility indexes for rangeland soils and soils disturbed by mining in coal fields of northwestern New Mexico. Mean indexes on rangeland soils range from 0 grams (of detached soil) on dune soil to 121 grams on wash-transport zones. Mean field-erodibility-index values of soils...
Flow model of Saginaw River near Saginaw, Michigan
David J. Holtschlag
1981, Open-File Report 81-1061
An unsteady-flow simulation model was applied to a 19.5-mile reach of Saginaw River. The model provides a method of determining instantaneous discharge for flows from -8,000 to 12,000 cubic feet per second. The currently used slope-rating method can be utilized to compute discharge only under steady and high-flow conditions. Unsteady...
Hydrology of area 32, Eastern Region, Interior Coal Province, Indiana
David J. Wangsness, R. L. Miller, Z. C. Bailey, Charles G. Crawford
1981, Open-File Report 81-498
Hydrologic and water-quality information from the coal region in parts of 11 counties in southwestern Indiana are summarized. Pennsylvanian and Mississippian bedrock are overlain by drift and till from the Kansan, Illinoian, and Wisconsinan glaciers that covered two-thirds of the area. Most of the coal is mined from Pennsylvanian coal...
Preliminary hydrologic evaluation of the North Horn Mountain coal-resource area, Utah
M.J. Graham, John E. Tooley, Don Price
1981, Open-File Report 81-141
North Horn Mountain is part of a deeply dissected plateau in central Utah which is characterized by deep, narrow, steep-walled canyons with local relief of more than 1,000 feet. Geologic units exposed in the North Horn Mountain area range in age from Late Cretaceous to Holocene and contain two mineable...