DO Model for Discharges from Deep Impoundments

by John M. Higgins, (M.ASCE), Environmental Engr.; Tennessee Valley Authority, 248 401 Bldg., Chattanooga, Tenn. 37401,
Byung R. Kim, (A.M.ASCE), Asst. Prof.; Georgia Inst. of Technology, Atlanta, Ga 30332,

Serial Information: Journal of the Environmental Engineering Division, 1982, Vol. 108, Issue 1, Pg. 107-122

Document Type: Journal Paper


A simple model is presented for the annual dissolved oxygen (DO) cycle of releases from the hypolimnion of deep impoundments. The model includes mathematical formulations and rate constants for the processes of BOD decay, atmospheric reaeration, and thermal stratification. It was used to characterize the DO cycle of releases from 17 Tennessee Valley Authority reservoirs, using three years of weekly DO and temperature data. Rate constants were estimated using the quasilinearizatin technique for estimating unknown parameters in a system of ordinary differential equations. The results indicate that the model can reasonably simulate annual DO variations of turbine discharges from hypolimnetic waters. Since the model is a simple formulation of complex reservoir processes, it is best suited for preliminary analyses.

Subject Headings: Water storage | Mathematical models | Hydrologic models | Dissolved oxygen | Thermal analysis | Reservoirs | Water discharge | Decomposition | Tennessee | United States

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