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Page 5523, results 138051 - 138075

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Geology of the Zwedru Quadrangle, Liberia
Eric R. Force, Helen Marie Beikman
1974, Open-File Report 74-307
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...
Flashing flow in hot water geothermal wells
Manuel Nathenson
1974, Journal of Research of the U.S. Geological Survey (2) 743-751
The production characteristics of hot-water geothermal wells which flash to steam-water mixtures in the cased part of the hole were-analyzed. The flashing flow is assumed to be isenthalpic and, for purposes of calculating pressure drop, a finely dispersed mixture of equal average velocity. Water flow in the aquifer is treated...
East African seminar/workshop trip report
Morris Deutsch
1974, Open-File Report 74-193
Reports activities of U.S.G.S project leader and officer of AID sponsor, in Kenya, on trip made for preparation of plans for conduct of a East Africa Seminar/Workshop on applications of remote sensing and especially ERTS-1 data to resources analysis and management. Activities included orientation of officials of Kenyan agencies responsible...
Sediment characteristics of five streams near Harrisburg, Pa., before highway construction
Lloyd A. Reed
1974, Open-File Report 74-140
Rainfall, streamfiow, sediment, and turbidity data are being collected as part of a study to evaluate the effects of highway construction on sediment discharge. The study is also designed to determine the effectiveness of different erosion-control measures in reducing sediment discharges. The study area, near Enola, Pa., consists of five...
First EROS/AID International Course on remote sensing
Raymond W. Fary
1974, Open-File Report 74-195
The First International Training Course on Remote Sensing held at the Earth Resources Observations Systems (EROS) Data Center in Sioux Falls, South Dakota, was sponsored by the Agency for International Development (AID), U.S. Department of State, from June 4 to 27, 1973. This course was conducted by the U.S. Geological...
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...
Streamflow measurement network review for hydroelectric power applications in Brazil
Francis T. Schaefer
1974, Open-File Report 74-357
This review of selected segments of the stream-gaging network of Brazil was undertaken by the writer in March and April, 1973, pursuant to an agreement between Companhia de Pesquisa de Recursos Minerais (CPRM) and Centrais Eletricas Brasileiras S.A. (ELETROBRAS) as a part of the cooperative program of the U.S. Geological...
Preliminary report on the geology of the Solok Quadrangle, West Sumatra
Keith Robinson
1974, Open-File Report 74-216
This report is a brief description of the geology of the Solok quadrangle in West Sumatra. It is based on work done by the writer from April 27 to October 14, 1971, as part of the U. S. Geological Survey (USGS) Cooperative Project with the Geological Survey of Indonesia (GSI)....
Straight line fitting of an observation path by least normal squares
William H. Kirby
1974, Open-File Report 74-187
In curtain hydro graphic problems, and perhaps in other geophysical problems, information must be collected as profiles along straight-line courses. When the inevitable deviations from perfect linearity occur, one must then find the straight line course that best approximates the actual observation path. Classical least squares (regression) does not solve...
Effects of local geology on ground motion in the San Francisco Bay region, California: A continued study
James F. Gibbs, Roger D. Borcherdt
1974, Open-File Report 74-222
Measurements of ground motion generated by nuclear explosions in Nevada have been completed for 99 locations in the San Francisco Bay region, California. The seismograms, Fourier amplitude spectra, spectral amplification curves for the signal, and the Fourier amplitude spectra of the seismic noise are presented for 60 locations. Analog amplifications,...
Land-surface subsidence in the Houston-Galveston region, Texas
R.K. Gabrysch, C.W. Bonnet
1974, Open-File Report 74-123
The pumping of large amounts of ground water in the Houston-Galveston region, Texas, has resulted in water-level declines of as much as 200 feet (61 metres) in wells completed in the Chicot aquifer and as much as 325 feet (99 metres) in wells completed in the Evangeline aquifer during 1943-73....