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Page 5914, results 147826 - 147850

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Saltwater intrusion in the Floridan aquifer, coastal Citrus and Hernando Counties, Florida, 1975
L. R. Mills, Paul D. Ryder
1977, Water-Resources Investigations Report 77-100
The coastal parts of Citrus and Hernando Counties, Fla., are undergoing extensive urban development along U.S. Highway 19. The Floridan aquifer, a thick sequence of limestone and dolomite , is the principal source of water supply for the coastal parts of these two counties. The construction of canals that penetrate...
Digital-model evaluation of the ground-water resources in Ocotillo-Coyote Wells Basin, Imperial County, California
James A. Skrivan
1977, Water-Resources Investigations Report 77-30
A flow model using finite-element techniques has been constructed for an alluvial aquifer in the Ocotillo-Coyote Wells Basin, Imperial County, Calif. Natural recharge is about 2,600 acre-feet per year, and estimated ground water in storage is 640 ,000 acre-feet. Pumpage totaled 880 acre-feet in 1975. The computed decline from steady-state...
Experimental study of artificial recharge alternatives in northwest Hillsborough County, Florida
William C. Sinclair
1977, Water-Resources Investigations Report 77-13
Extensive water withdrawal from the Floridan aquifer in the urban Tampa Bay area has induced leakage from the overlying surficial aquifer adversely effecting the water table and lake levels. Artificial recharge could reduce the impact of these effects. Four experiments were conducted to investigate possible recharge alternatives; sinkhole recharge, water-spreading,...
Bedrock geologic map of the southern part of the Diorite and Champion 7 1/2 minute quadrangles, Marquette County, Michigan
William F. Cannon, John S. Klasner
1977, IMAP 1058
This map illustrates the bedrock geology of part of the Marquette iron range in the Diorite and Champion 7 ½-minute quadrangles. The area includes part of the Marquette trough, a synclinorium containing rocks of the Marquette Range Supergroup (Precambrian X) and older Precambrian W basement gneiss. Among the Precambrian X...
Geologic map of the Eridania Quadrangle of Mars
R. A. De Hon
1977, IMAP 1008
The Eridania quadrangle is located within the densely cratered terrain of the southern hemisphere of Mars, east of the large circular Hellas Basin. The areas contain three distinct physiographic provinces that divide...
The Alaskan Mineral Resource Assessment Program; background information to accompany folio of geologic and mineral resource maps of the McCarthy Quadrangle, Alaska
E. M. MacKevett, N. R. D. Albert, D.F. Barnes, J. E. Case, Keith Robinson, D.A. Singer
1977, Circular 739
The McCarthy 1? by 3? quadrangle, in eastern south-central Alaska, contains potentially significant resources of copper and possibly of a few other commodities. This circular and a companion folio of maps represent results of integrated field and laboratory studies in the disciplines of geology, geophysics, geochemistry, and satellite imagery that...
Sediment transport to the Fox Chain of Lakes, Illinois
Timothy P. Brabets
1977, Open-File Report 77-867
Two main tributaries to the Fox Chain of Lakes, the Fox River and Nippersink Creek, were sampled twice weekly and during periods of high runoff to determine the amount of suspended inorganic sediment being transported into the Chain of Lakes. Sediment yields were determined by using the transport-duration technique. It...