Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Application of Water-Quality Management Model for Upstream Basin of Hoengsung Dam

횡성댐 상류유역에 대한 수질관리모형의 적용

  • Kim, Sang Ho (Department of Civil Engineering, Sangji University) ;
  • Lee, Eul Rae (Hydroinformatics Research Center, KIWE, Kwater)
  • 김상호 (상지대학교 이공과대학 건설시스템공학과) ;
  • 이을래 (한국수자원공사 수자원연구원 물정보화연구소)
  • Received : 2008.01.23
  • Accepted : 2008.03.14
  • Published : 2008.03.30
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Abstract

In this study, an optimized deterministic water-quality model was constructed to estimate water quality of a river and lake in the upstream basin of a dam. A stochastic water-quality analysis using reliability analysis technique was applied to the model. The model was tested in the 13.9 km reach from Maeil stage station of Kyechun to Hoengsung Dam of Sum River. After finding hydraulic characteristics from nonuniform flow analysis, Broyden-Fletcher-Goldfarb-Shanno (BFGS) optimization technique for model calibration was applied to determine optimum reaction parameters, and model verification was performed based on these. The stochastic model, using Mean First­Order Second­-Moment (MFOSM) and Monte-Carlo methods, was applied to the same reach as the deterministic study. Variations of discharge and water quality in headwater were considered, as well as variations of hydraulic coefficients and reaction coefficients. The statistical results of output variables from MFOSM were similar to those from the Monte-Carlo method. Risk analysis using MFOSM and Monte-Carlo methods presented the probabilities of some locations in the Hoengsung Lake violating existing water-quality standards in terms of DO and BOD.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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