Evaluation of factors influencing the inorganic water-quality regimen of Carson River, Carson Valley, Nevada-California
AuthorSpane, Frank A., Jr.
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Carson River exhibits a significant increase with respect to dissolved solids concentration as it flows through Carson Valley. The increase in dissolved solids is particularly evident during late summer and early fall months. Causes for increases in concentration are attributable to dispersed and point source inputs within Carson Valley basin. Natural and man-related factors which have discernible impact on the inorganic water-quality regimen of Carson River include: Carson River inflow, precipitation, intra-basin runoff, evapotranspiration, sewage treatment plant effluent, agricultural practices, thermal waters, and ground-water base flow. Methods are presented which outline procedures utilized in estimating various factors' input and impact on the Carson River system during water years 1973 and 1974. A chemical budget was developed for Carson River to evaluate impact on individual chemical constituents. Water-quality analyses were conducted on a monthly basis on selected surface and ground-water sources to ascertain chemical composition and spatial and time-variant behavior for factors examined in Carson Valley. Water-quality parameters examined include: alkalinity, chloride, sulfate, sodium, potassium, calcium, magnesium, silica, and total dissolved solids (sum).
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