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Page 5558, results 138926 - 138950

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Finite-difference model to simulate the areal flow of saltwater and fresh water separated by an interface
James W. Mercer, S. P. Larson, Charles R. Faust
1980, Open-File Report 80-407
Model documentation is presented for a two-dimensional (areal) model capable of simulating ground-water flow of salt water and fresh water separated by an interface. The partial differential equations are integrated over the thicknesses of fresh water and salt water resulting in two equations describing the flow characteristics in the areal...
Histograms and correlation table for selected elements in samples of the ash of black spruce needles from the Tanacross Quadrangle, Alaska
Gary C. Curtin, G.W. Day, R. B. Tripp
1980, Open-File Report 80-655
These histograms and correlation table show the distribution and abundance of, and correlations between, the populations of 21 elements in the ash of black spruce (Picea Mariana B.S.P.) needles collected throughout most of the Tanacross 1:250,000-scale quadrangle. The samples were collected during reconnaissance geochemical studies as part of the U.S....
Mount St. Helens ash fall in the Bull Run watershed, Oregon, May-June 1980
Michael V. Shulters, Daphne G. Clifton
1980, Open-File Report 80-593
On May 25-26, May 30-June 2, and June 12-13, 1980, strong, high-altitude winds from the north occurred during periods of volcanic-ash eruption at Mount St. Helens in southwestern Washington. As a result, ash fell in the Bull Run watershed, Oregon, some 50 miles to the south, the principal water-supply source...
Water-resources investigations of the U.S. Geological Survey in Montana, October 1979 through September 1980
Water Resources Division, U.S. Geological Survey
1980, Open-File Report 80-222
This report describes water-resources investigations of the U.S. Geological Survey in Montana, October 1979 through September 1980. Programs consist of (1) collecting hydrologic data on a continuing basis, (2) conducting water-resources appraisals of surface and ground water, (3) conducting supportive research in hydrology and related fields, (4) disseminating water data...
Geologic and operational summary, COST no. G-1 well, Georges Bank area, North Atlantic OCS
Roger V. Amato, John W. Bebout, editor(s)
1980, Open-File Report 80-268
The first Continental Offshore Stratigraphic Test (COST) well on the U.S. North Atlantic Outer Continental Shelf (OCS) was drilled by Ocean Production Company between April 6 and July 26, 1976, and designated the COST No. G-1. Geological and engineering data obtained from this deep well in the Georges Bank Basin...
Index to active hydrologic data collection sites in Florida, 1978-79
James D. Simmons
1980, Open-File Report 80-220
There are about 5,000 active data-collection sites in Florida operated by the U.S. Geological Survey in cooperation with State , local and Federal agencies. This index shows the location of each site, the cooperator(s) supporting the data-collection activities, the type and frequency of the data collected, and the U.S. Geological...
Hydrology and geochemistry of thermal ground water in southwestern Idaho and north-central Nevada
H.W. Young, R.E. Lewis
1980, Open-File Report 80-2043
In southwestern Idaho and north-central Nevada, thermal groundwater occurs under artesian conditions in igneous or sedimentary rocks of Tertiary age. Temperatures of the groundwater range from 30 degrees to more than 80 degrees Celsius. Thermal waters are a sodium carbonate or bicarbonate type; nonthermal waters are a calcium bicarbonate. Chemical...
Estimated oil and gas reserves, Gulf of Mexico outer continental shelf, January 1, 1979
Floyd T. Bryan, John H. Knipmeyer, E. Kenneth Schluntz
1980, Open-File Report 80-644
Remaining recoverable reserves of oil* and as in the Gulf of Mexico Outer Continental Shelf area have been estimated to be about 2.76 billion barrels of oil and 37.2 trillion cubic feet of gas, as of January 1, 1979. These reserves are recoverable from 370 studied fields under the Federal...
Surface-water data for Idaho, 1971-75
S.C. Cordes
1980, Open-File Report 80-2041
Surface-water data collection began in Idaho in 1889 with the establishment of three gaging stations: Snake River at Eagle Rock (now Idaho Falls), Big Wood River near Hailey, and Bear River at Preston. Following passage of the National Reclamation Act of 1902, a notable increase in investigations of water resources...