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Page 5717, results 142901 - 142925

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Field verification of reconstructed dam-break flood, Laurel Run, Pennsylvania
Cheng-lung Chen, Jeffrey T. Armbruster
1979, Open-File Report 79-1483
A one-dimensional dam-break flood routing model is verified by using observed data on the flash flood resulting from the failure of Laurel Run Reservoir Dam near Johnstown, Pennsylvania. The model has been developed on the basis of an explicit scheme of the characteristics method with specified time intervals. The model...
Structural controls of hot-spring systems on southwestern Montana
Robert A. Chadwick, Robert Benjamin Leonard
1979, Open-File Report 79-1333
Thermal waters that issue as hot (more than 38C) springs in southwestern Montana appear to circulate to depth along Cenozoic block faults, deep fractures penetrating the dominantly crystalline rock crust, or major structural lineaments. At individual hot springs, rising thermal waters are transmitted along conduits formed by the intersection of...
Pliocene intrusive rocks and mineralization near Rico, Colorado
Charles W. Naeser, C. G. Cunningham, R. F. Marvin, J. D. Obradovich
1979, Open-File Report 79-1093
Fission-track and potassium-argon studies of intrusive rocks in the vicinity of Rico, Colorado, have shown that at least two periods of igneous activity occurred and that significant ore mineralization is associated with alaskites and latites that are 3 to 5 million years old. Discordant fission-track ages of apatite and zircon...
Hydrogeologic features of the alluvial deposits in the Nowood River drainage area, Bighorn Basin, Wyoming
M. E. Cooley, William J. Head
1979, Open-File Report 79-1291
In the Nowood River drainage area, Wyoming, the principal deposits comprising the alluvial aquifer include the flood-plain and younger (generally undissected) alluvial-fan deposits and a unique boulder-fan gravel. Other deposits mapped, but virtually nonwater yielding, are the older (dissected) alluvial-fan, pediment, and terrace deposits. Terraces are capped by gravel and...
General geology and mines of the East Tintic mining district, Utah and Juab counties, Utah, with sections on the geology of the Burgin mine and the geology of the Trixie mine
H. T. Morris, Thomas Seward Lovering, A. P. Mogensen, W.M. Shepard, L. I. Perry, S. M. Smith
1979, Professional Paper 1024
This report is a study of the rocks, geologic structures, and mines of a highly productive silver, gold, and base-metal mining district in the east-central Great Basin. The East Tintic mining district is in the east-central part of the East Tintic Mountains, near the east margin of the Basin and...
Sediment transport in the Tanana River in the vicinity of Fairbanks, Alaska, 1977-78
Robert L. Burrows, Bruce Parks, William W. Emmett
1979, Open-File Report 79-1539
Measurements of the sediment load of the Tanana River in the vicinity of Fairbanks, Alaska, show that suspended-sediment transport rate in tons per day, relates to water discharge, in cubic feet per second, as: Suspended-sediment transport rate (tons/day) = 5.717 x 10 to the minus 8th power x water discharge...
Water resources of the Santa Rosa Indian Reservation and vicinity, Riverside County, California
Anthony Buono, W. R. Moyle, Patricia Dana
1979, Open-File Report 79-1172
Additional water for irrigation is needed by the Santa Rosa Indian Reservation, Riverside County, California. Water in the area is derived from precipitation, which averages 12 inches annually, on three subbasins nearly surrounding the 17-square-mile reservation. No ground water flows in from outside the area. A supply well that taps...
An appraisal of pumping effects on the Edgeley Aquifer, La Moure County, North Dakota, as determined by a digital model
M. R. Burkart
1979, Open-File Report 79-748
A finite-difference digital model simulated hydrologic conditions in the Edgeley aquifer, which is an unconfined glacial-drift aquifer. The calibrated model supported the hypothesis that under natural steady-state conditions, recharge is from precipitation and discharge is through evapotranspiration. This hypothesis was further supported by comparing simulated water levels to observed water...
Ground-water data in the Baker County-northern Malheur County area, Oregon
C. A. Collins
1979, Open-File Report 79-695
Ground-water data for the Baker County-northern Malheur area, Oregon, are tabulated for the Bureau of Land Management. The data include well and spring records, a well-location map, drillers' logs of wells, observation-well hydrographs, and chemical analyses of ground-water samples. The reported yields of wells and springs in the area ranged...
Selected Geological Survey, U.S. Bureau of Mines, and Alaska Division of Geological and Geophysical surveys reports and maps on Alaska released during 1978, indexed by quadrangle
Edward Huntington Cobb
1979, Open-File Report 79-706
This open—file report lists all Geological Survey, U.S. Bureau of Mines, and State of Alaska Division of Geological and Geophysical Surveys reports and maps on the geology, geophysics, and mineral and water resources of Alaska published or released to open files in 1978. They are listed by the quadrangles (scale...
A summary of measured hydraulic data for the series of steady and unsteady flow experiments over patterned roughness
Dannie L. Collins, Kathleen M. Flynn
1979, Open-File Report 79-1260
This report summarizes and makes available to other investigators the measured hydraulic data collected during a series of experiments designed to study the effect of patterned bed roughness on steady and unsteady open-channel flow. The patterned effect of the roughness was obtained by clear-cut mowing of designated areas of an...
Plan of study for the northern Midwest regional aquifer-system analysis
W. L. Steinhilber, H. L. Young
1979, Water-Resources Investigations Report 79-44
Sedimentary rocks of Cambrian and Ordovician age form a major aquifer system in most of Wisconsin and Iowa, northern Illinois, northwestern Indiana, southeastern Minnesota, and northern Missouri. Many metropolitan areas depend on the aquifer for all or part of their water supplies. Declines in potentiometric head have been large in...