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Statistical analyses of flood frequency, low-flow frequency, and flow duration of streams in the Philadelphia Area, Pennsylvania
Andrew Voytik
1986, Water-Resources Investigations Report 85-4008
Flood frequency, low-flow frequency, and flow-duration characteristics were computed for 26 stream-gaging stations in and near Philadelphia. Data were obtained from 21 continuous-recording stations and five stations that were initially continuous-recording stations, but which were subsequently converted to crest-stage stations. The annual peak flows were fitted to the three-parameter log-Pearson...
Plan of study for the Regional Aquifer-System Analysis, Columbia Plateau, Washington, northern Oregon, and northwestern Idaho
J. J. Vaccaro
1986, Water-Resources Investigations Report 85-4151
The U.S. Geological Survey began a 4-year study of the regional aquifer system underlying the Columbia Plateau, in central and eastern Washington, northern Oregon, and northwestern Idaho in October 1983, as part of the Regional Aquifer System Analysis program. The study will describe the geohydrology, geochemistry, and quality of water...
Three-dimensional steady-state simulation of flow in the sand-and-gravel aquifer, southern Escambia County, Florida
Henry Trapp, L.H. Geiger
1986, Water-Resources Investigations Report 85-4278
The sand-and-gravel aquifer is the only freshwater aquifer in southern Escambia County, Florida and is the source of public water supply for the area, including the City of Pensacola. The aquifer was simulated by a two-layer, digital model to provide hydrologic information for water resource planning. The lower layer represents...
Geologic map of southern Prince of Wales Island, southeastern Alaska
George E. Gehrels, Jason B. Saleeby
1986, Open-File Report 86-275
Southern Prince of Wales Island is underlain by stratified, intrusive, and metamorphic rocks of Cretaceous through pre-Middle Ordovician age and by surficial deposits. The region was mapped originally in reconnaissance fashion by Buddington and Chapin (1929) and subsequently by W.H. Condon and I.L. Tailleur (unpublished U.S.G.S. report, 1960) primarily with...
Ground-water levels in observation wells in Oklahoma, period of record to March 1985
Robert L. Goemaat, Lionel D. Mize, Ambrose J. Madaj, Dannie E. Spiser
1986, Open-File Report 86-314
During the 1984-85 climatic years, the U.S. Geological Survey, in cooperation with the Oklahoma Water Resources, collected ground-water level data in Oklahoma from 1,018 sites in 76 of the State's 77 counties. This report is a compilation of all available data through March 1985 for each well currently in the...
Genesis and evolution of the Baid al Jimalah tungsten deposit, Kingdom of Saudi Arabia
Robert J. Kamilli
1986, Open-File Report 86-588
The Baid al Jimalah tungsten deposit flat 25°09 N., long 42°41' E.) is a swarm of steeply dipping, sheeted, tungsten-bearing quartz veins. It is spatially, temporally, and genetically associated with a 569 Ma, highly differentiated, porphyritic granite that intrudes late Proterozoic, immature sandstones of the Murdama group. The bulk of the...