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Modeling of Surface Water Pumps in TVA Reservoirs

by Boualem Hadjerioua,
Mark H. Mobley,
Gary E. Hauser,
W. Gary Brock,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

This paper describes the numerical simulation of surface water pump perforniance at Cherokee and Douglas Dams. The modeling objective was to determine the surface water pump initial velocities that optimize the improvement of dissolved oxygen (DO) content in hydropower plant releases without disturbing reservoir bottom sediment. This was accomplished for various thermal stratification conditions and reservoir elevations. The PHOENICS numerical model was used to predict the flow field using two-dimensional Cartesian coordinates. Turbulence was accounted for by using the K-? turbulence model, and the Boussinesq approximation was used to include buoyancy effects. The model was calibrated with field data from Cherokee Reservoir. As part of this study, a case-book was developed for recommended surface water pump operating speeds under various scenarios of reservoir elevation and thermal stratification for Cherokee and Douglas Reservoirs.

Subject Headings: Reservoirs | Numerical models | Surface water | Pumps | Dissolved oxygen | Water stratification | Two-dimensional models

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