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Page 5621, results 140501 - 140525

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Ground-water hydrology of prairie potholes in North Dakota
C. E. Sloan
1972, Professional Paper 585-C
Prairie potholes (sloughs) are water-holding depressions of glacial origin in the prairies of the Northern United States and southern Canada. Water is supplied to the potholes by precipitation on the water surface, basin runoff, and seepage inflow of ground water. Depleticn of pothole water results from evapotranspiration, overflow, and seepage...
Vegetation of prairie potholes, North Dakota, in relation to quality of water and other environmental factors
R. E. Stewart, H.A. Kantrud
1972, Professional Paper 585-D
Measurements of specific conductance provide an adequate indication of the average salinity of surface waters in natural ponds and lakes of the northern .prairie region. Yearly and seasonal variations in specific conductance were much greater in brackish and subsaline wetlands than in fresh-water areas. The principal vegetational types. Land-use practices...
Geological Survey research 1972, Chapter C
Water Resources Division, U.S. Geological Survey
1972, Professional Paper 800-C
This collection of 37 short papers is the second published chapter of "Geological Survey Research 1972." The papers report on scientific and economic results of current work by members of the Conservation, Geologic, and Water Resources Divisions of the U.S. Geological Survey.Chapter A, to be published later in the year,...
Population ecology of the mallard: I. A review of previous studies and the distribution and migration from breeding areas
David R. Anderson, Charles J. Henny
1972, Resource Publication 105
This report, the first of a series of reports on a comprehensive analysis of population data on the? millIard at? the continental level, provides background information including a review of the history of waterfowl management and a resume of previous studies of the mallard. The breeding range of the mallard...
Recent activity of glaciers of Mount Rainier, Washington
Robert S. Sigafoos, E. L. Hendricks
1972, Professional Paper 387-B
Knowing the ages of trees growing on recent moraines at Mount Rainier, Wash., permits the moraines to be dated. Moraines which are ridges of boulders, gravel, sand, and dust deposited at the margins of a glacier, mark former limits of a receding glacier. Knowing past glacial activity aids our understanding...