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A microcomputer-based data acquisition and control system for the direct shear, ring shear, triaxial shear, and consolidation tests
Philip S. Powers
1983, Open-File Report 83-491
This report is intended to provide internal documentation for the U.S. Geological Survey laboratory's automatic data acquisition system. The operating procedures for each type of test are designed to independently lead a first-time user through the various stages of using the computer to control the test. Continuing advances in computer...
FFTFIL; a filtering program based on two-dimensional Fourier analysis of geophysical data
T.G. Hildenbrand
1983, Open-File Report 83-237
The filtering program 'fftfil' performs a variety of operations commonly required in geophysical studies of gravity, magnetic, and terrain data. Filtering operations are carried out in the wave number domain where the Fourier coefficients of the input data are multiplied by the response of the selected filter. Input grids can...
Water-resources investigations of the U.S. Geological Survey in the Souris-Red Rivers basin in Minnesota, North Dakota, and South Dakota
J. E. Heisel
1983, Open-File Report 83-218
Information obtained on water resources by Federal and State agencies in the Souris-Red Rivers basin along the Canadian border in the midwestern United States is available for analysis to address flood, drought, and supply problems. It consists of streamflows, ground water measurements, and quality of water determinations. This summary contains...
Evidence of tectonic stability along the middle Columbia River, Washington, in Quaternary time
William Henry Hays, Robert L. Schuster
1983, Open-File Report 83-365
Observations of outcrops and Pleistocene-age surfaces along the Columbia River, between Priest Rapids Dam and Richland, Washington, provide evidence for recent tectonic stability that may be significant to planning of earthquake-sensitive engineered structures in the vicinity. Apparent continuity of layering in the Yakima Basalt (Miocene), Ringold Formation (Pliocene), and calcrete...
The oil and gas industry of coastal Louisiana and its effects on land use and other socioeconomic patterns
Donald W. Davis, John L. Place
1983, Open-File Report 83-118
Louisiana's coastal wetlands, alone with their well-drained urbanized strips, have been significantly affected by the oil and gas industry. Onshore, more than 6,300 exploratory wells and more than 21,000 development wells were drilled in Louisiana's eight southernmost parishes between 1937 and 1977. Nearly all those wells were in wetlands or...