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Low-flow characteristics of Kentucky streams - A preliminary report
R.V. Swisshelm Jr.
1974, Open-File Report 73-273
The U.S. Geological Survey has been gathering low-flow data on streams throughout Kentucky for several decades. Much of the data now have been analyzed to determine the frequency of the annual low flow on those streams. Knowledge of the magnitude and frequency of low flow is necessary for planning, managing,...
Economic geology of the Isla de Mona Quadrangle, Puerto Rico
Reginald Peter Briggs
1974, Open-File Report 74-226
Limiting this tableland In the northern part of Isla de Mona are sheer sea cliffs chiefly exposing the Isla de Mona Dolomite. Around the southern part of the island are Irregular cliffs and steep slopes that chiefly expose the Lirio Limestone. The structure of Isla de Mona consists of two...
Seismic investigations in Wyoming as part of the Wagon Wheel definition studies
Kenneth C. Bayer, Geraldine M. Wuollet
1974, Open-File Report 74-30
As part of the Wagon Wheel definition studies, seismic investigations were conducted in Wyoming by personnel of the United States Geological Survey, Las Vegas, Nevada. From March 22, 1973 to February 22, 1974, a seismograph station recorded seismic activity at five different areas in the vicinity of the proposed Project Wagon Wheel location in...
Time-dependent spectral analysis of thirty-one strong-motion earthquake records
Virgilio Perez
1974, Open-File Report 74-48
Velocity response spectral analysis as a function of time for 5 percent critical damping is presented for the horizontal components of thirty-one earthquake records (61 components). A nomograph that allows conversion of the velocity response envelope to a displacement response envelope and a pseudo-absolute acceleration response envelope spectrum is also...
Geology of the Harper Quadrangle, Liberia
M. R. Brock, A.H. Chidester, M.G.W. Baker
1974, Open-File Report 74-310
As part of a program undertaken cooperatively by the Liberian Geological Survey (LGS) and the U. S. Geological Survey (USGS), under the sponsorship of the Government of Liberia and the Agency for International Development, U. S. Department of State, Liberia was mapped by geologic and geophysical methods during the period...
Summary appraisals of the Nation's ground-water resources; Texas Gulf region
E. T. Baker Jr., James Ray Wall
1974, Open-File Report 74-331
Ground water in the Texas-Gulf Region is a large and important resource that can provide a more significant percentage of the total water supply of the region. Total water requirements within the region are projected to rise sharply from 14 million acre-feet (17 cubic kilometres) in 1970 to nearly 26...