Modeled Effects of Hydraulic Mixing Devices on Reservoir Water Qualityby Russ T. Brown, Tennessee Technological Univ, Cookeville, TN, USA,
Chris Nubbe, Tennessee Technological Univ, Cookeville, TN, USA,
Abstract: A two-dimensional reservoir water quality model was used to evaluate effects of hydraulic mixing devices on release and water quality. Seasonal simulations of Douglas Reservoir water quality were calibrated using a 2-D mass balance model for flows, temperatures, and several water quality variables including dissolved oxygen. Douglas Reservoir experiences significant dissolved oxygen depletion during the summer months so releases are low in dissolved oxygen and impact tailwater fishery resources. Several hydraulic mixing devices were evaluated as alternatives to turbine venting. Garton pumps, selective withdrawal, and air bubble columns were the devices considered.
Subject Headings: Water quality | Hydrologic models | Dissolved oxygen | Hydraulic models | Two-dimensional models | Reservoirs | Flow simulation | Two-dimensional flow
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