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Evaluation of SELECT Model for the Quality Prediction of Water Released from Stratified Reservoir  

Lee, Heung Soo (Department of Environmental Engineering, Chungbuk National University)
Chung, Se Woong (Department of Environmental Engineering, Chungbuk National University)
Shin, Sang Il (Department of Environmental Engineering, Chungbuk National University)
Choi, Jung Kyu (Department of Environmental Engineering, Chungbuk National University)
Kim, Yu Kyung (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society on Water Environment / v.23, no.5, 2007 , pp. 591-599 More about this Journal
Abstract
The quality of water released from a stratified reservoir is dependent on various factors such as the location and shape of intake facility, structure of reservoir stratification, profile of water quality constituent, and withdrawal flux. Sometimes, selective withdrawal capabilities can provide the operational flexibility to meet the water quality demands both in-reservoir and downstream. The objective of this study was to evaluate the performance of a one-dimensional reservoir selective withdrawal model (SELECT) as a tool for supporting downstream water quality management for Daecheong and Imha reservoirs. The simulated water quality variables including water temperature, dissolved oxygen (DO), conductivity, turbidity were compared with the field data measured in tailwater. The model showed fairly satisfactory results and high reliability in simulating observations. The coefficients of determinant between simulated and observed turbidity values were 0.93 and 0.95 for Daecheong and Imha reservoirs, respectively. The outflow water quality was significantly influenced by water intake level under fully stratified condition, while the effect of intake amount was minor. In conclusion, the SELECT is simple but effective tool for supporting downstream water quality prediction and management for both reservoirs.
Keywords
Daecheong reservoir; Imha reservoir; Outflow water quality; Selective withdrawal model; Stratification;
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