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Page 6142, results 153526 - 153550

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An assessment of areal and temporal variations in streamflow quality using selected data from the National Stream Quality Accounting Network
Timothy Doak Steele, Edward J. Gilroy, Richard O. Hawkinson
1974, Open-File Report 74-217
Streamflow chemical-quality data and stream-temperature data at 88 stations throughout the United States and Puerto Rico were analyzed to develop and to evaluate methodologies for the general assessment of the variation of the Nation's streamflow-quality conditions in space and over time. The spatial variation is described by the use of...
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...
Geothermal gas sampling methods
Alfred Hemingway Truesdell, K.L. Pering
1974, Open-File Report 74-361
The following method of geothermal gas collection meets our needs for chemical and isotopic gas analyses, requires a minimum of special equipment in the field, and provides field analytical data of assistance in a sampling program....
Geology of the Juazohn Quadrangle, Liberia
Russell G. Tysdal
1974, Open-File Report 74-309
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...
Preliminary report on the geology of the continental borderland of Southern California
J. G. Vedder, L. A. Beyer, A. Junger, G. W. Moore, A. E. Roberts, J. C. Taylor, H. C. Wagner
1974, Miscellaneous Field Studies Map 624
Appraisal of the mineral resource potential and assessment of environmental problems of any specific area require an understanding of the regional geology. The geology of t he coastal zone and offshore islands from Point Conception to the Mexican boundary serves as a frame of reference from which rock units and...
Water resources data for Mississippi, water year 1973
Water Resources Division, U.S. Geological Survey
1974, Water Data Report MS-73-1
Water resources data for the 1973 water year for Mississippi including records of streamflow or reservoir storage at gaging stations, partial-record stations, and miscellaneous sites, and records of water-quality data on the chemical and physical characteristics of surface water, are given in this report. In Part 1, records are included...