Simulation of the Pit 3, 4 and 5 Hydroelectric Project Using the USFWS Instream Temperature Model

by W. S. Lifton, Woodward-Clyde Consultants, Walnut, Creek, CA, USA,
K. A. Voos, Woodward-Clyde Consultants, Walnut, Creek, CA, USA,
D. A. Gilbert, Woodward-Clyde Consultants, Walnut, Creek, CA, USA,

Document Type: Proceeding Paper

Part of: Waterpower '85


The Pit River in Shasta County, California, is the site of the Pit 3, 4, and 5 Project (Project). A two-year Bald Eagle and Fish Study was initiated in March 1983. As part of the overall study, the Instream Flow Incremental Methodology (IFIM) was used to determine the relationship between instream flows and habitat for both nongame fish and trout. It was also necessary to determine how alternate flow releases would affect the temperature and water quality of the Pit River, since these factors can influence the quality of the fishery. The U. S. Fish and Wildlife Service (USFWS) Instream Temperature Model (SNTEMP) was used to predict water temperature that would occur along the Pit River at different flow releases under normal and extreme hydrological and meteorological conditions. The primary emphasis of this paper is on the use of the SNTEMP.

Subject Headings: Water quality | Hydro power | Federal government | Temperature effects | Simulation models | Hydrologic models | Temperature measurement | Temperature distribution | California | United States

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