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Two-Dimensional Hydrodynamic and Water Quality Simulations for a Coinjunctive System of Daecheong Reservoir and Its Downstream  

Jung, Yong Rak (Department of Environmental Engineering, Chungbuk National University)
Chung, Se Woong (Department of Environmental Engineering, Chungbuk National University)
Ryu, In Gu (Department of Environmental Engineering, Chungbuk National University)
Choi, Jung Kyu (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society on Water Environment / v.24, no.5, 2008 , pp. 581-591 More about this Journal
Abstract
Most of our rivers are fragmented by the presence of at least one large dam. Dams are often the most substantial controller of the flow regimes and aquatic environments of natural river system. The quality of downstream water released from a stratified reservoir is highly dependent on upstream reservoir water quality. Thus, an integrated modeling approach is more efficient, compared to fragmented modeling approach, and necessary to better interpret the impact of dam operation on the down stream water quality. The objectives of this study were to develop an integrated reservoir-river modeling system for Daecheong Reservoir and its downstream using a two-dimensional laterally averaged hydrodynamic and water quality model, and evaluate the model's performance against field measurement data. The integrated model was calibrated and verified using filed data obtained in 2004 and 2006. The model showed satisfactory performance in predicting temporal variations of water stage, temperature, and suspended solid concentration. In addition, the reservoir-river model showed efficient computation time as it took only 3 hours for one year simulation using personal computer (1.88 Ghz, 1.00 GB RAM). The suggested modeling system can be effectively used for assisting integrated management of reservoir and river water quality.
Keywords
CE-QUAL-W2; Dam release water quality; Reservoir-river system; Suspended sediment; Water temperature;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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