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Page 5558, results 138926 - 138950

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Geology and mineral deposits of an area in the Departments of Antioquia and Caldas (Subzone IIB), Colombia
Tomas Feininger, Dario Barrero L., Nestor Castro, R.B. Hall
1973, Open-File Report 73-69
The Inventario Minero National (IMN), a four-year cooperative geologic mapping and mineral resources appraisal project, was accomplished under an agreement between the Republic of Colombia and the U. S. Agency for International Development from 1964 through 1969. Subzone IIB, consisting essentially of the east half of Zone comprises nearly 20,000...
Preparative free-flow electrophoresis as a method of fractionation of natural organic materials
J.A. Leenheer, Ronald L. Malcolm
1973, Water Supply Paper 1817-D
Preparative free-flow electrophoresis was found to be an efficient method of conducting large-scale fractionations of the natural organic polyelectrolytes occurring in many surface waters and soils. The method of free-flow electrophoresis obviates, the problem of adsorption upon a supporting medium and permits the use of high potential gradients and currents...
The Pine-Popple River basin — Hydrology of a wild river area, northeastern Wisconsin
Edward L. Oakes, Stephen J. Field, Lawrence P. Seeger
1973, Water Supply Paper 2006
The Pine and Popple Rivers, virtually unaltered by man, flow through a semiprimitive area of forests, lakes, and glacial hills. White-water streams, natural lakes, fish and animal life, and abundant vegetation contribute to the unique recreational and aesthetic characteristics of the area. Resource planning or development should recognize the interrelationships...
Improvement of trout streams in Wisconsin by augmenting low flows with ground water
R.P. Novitzki
1973, Water Supply Paper 2017
Approximately 2 cubic feet per second of ground water were introduced into the Little Plover River in 1968 when natural streamflow ranged from 3 to 4 cubic feet per second. These augmentation flows were retained undiminished through the 2-mile reach of stream monitored. Maximum stream temperatures were reduced as much...
Water resources and geology of Mount Rushmore National Memorial, South Dakota
J.E. Powell, James Jennings Norton, D. G. Adolphson
1973, Water Supply Paper 1865
Ground water suitable for public supply can be obtained from fractured metamorphic and igneous rooks at Mount Rushmore National Memorial, S. Dak. The memorial comprises three main drainage basins: Starling basin, Lafferty Gulch basin, and East Boundary basin. Ground water is most prevalent in Lafferty Gulch basin but Starling basin contributes...
Ground water in the Eugene-Springfield area, southern Willamette Valley, Oregon
F. J. Frank
1973, Water Supply Paper 2018
The cities of Eugene and Springfield and their outlying suburban and rural districts constitute an area of rapid population growth where progressively greater volumes of ground water are being required for irrigation and industrial and public supplies. The area is also one of diverse geologic and hydrologic conditions. As used...
Chemical quality of surface water in the Flaming Gorge Reservoir area, Wyoming and Utah
R. J. Madison, Kidd M. Waddell
1973, Water Supply Paper 2009-C
Construction of Flaming Gorge Dam on the Green River by the U.S. Bureau of Reclamation started in 1959, and storage began in November 1962. A reconnaissance study was made during the period 1966-68 to determine the effects of the reservoir on the chemical quality of the effluent water and to...
A national study of the streamflow data-collection program
Manuel A. Benson, Rolland William Carter
1973, Water Supply Paper 2028
The streamflow data program of the U.S. Geological Survey was evaluated in a nationwide study during 1970. The principal elements of the study were (1) establishing the objectives and goals of the program, (2) analyzing all available data to determine which of the goals have already been met, (3) considering...
Fractionation and characterization of natural organic matter from certain rivers and soils by free-flow electrophoresis
J.A. Leenheer, Ronald L. Malcolm
1973, Water Supply Paper 1817-E
Soluble river organic matter and soil fulvic acids from a variety of environments were compared by examining the free-flow electrophoretic fractionation curves of organic carbon, color, and polysaccharides. Significant amounts of virtually colorless organic material were found in both the soil and the river preparations. Polysaccharides comprised 20-75 percent of...
Characteristics of water quality and streamflow, Passaic River basin above Little Falls, New Jersey
Peter W. Anderson, Samuel Denton Faust
1973, Water Supply Paper 2026
The findings of a problem-oriented river-system investigation of the water-quality and streamflow characteristics of the Passaic River above Little Falls, N.J. (drainage area 762 sq mi) are described. Information on streamflow duration, time-of-travel measurements, and analyses of chemical, biochemical, and physical water quality are summarized. This information is used to...
Water resources of the Big Sioux River Valley near Sioux Falls, South Dakota
Donald G. Jorgensen, Earl A. Ackroyd
1973, Water Supply Paper 2024
The major sources of water in the Big Sioux River valley between Sioux Falls and Dell Rapids, S.Dak., are the Big Sioux River and the glacial outwash aquifer beneath the flood plain. The river and the aquifer are hydraulically connected. The Big Sioux River has an average annual discharge of 246...