Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Evaluation of the Dam Release Effect on Water Quality using Time Series Models

시계열 모형의 적용을 통한 댐 방류의 수질개선 효과 검토

  • Kim, Sangdan (Department of Environmental Policy, Gyeoggi Research Institute) ;
  • Yoo, Chulsang (Department of Civil and Environmental Engineering, Korea University)
  • 김상단 (경기개발연구원 환경정책연구부) ;
  • 유철상 (고래대학교 사회환경시스템공학과)
  • Received : 2004.10.11
  • Accepted : 2004.10.22
  • Published : 2004.11.30
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Abstract

Water quality forecasting with long term flow is important for management and operation of river environment. However, it is difficult to set up and operate a physical model for water quality forecasting due to large uncertainty in the data required for model setting. Therefore, relatively simpler stochastic approaches are adopted for this problem. In this study we try several multivariate time series models such as ARMAX models for the possible substitute for water quality forecasting. Those models are applied to the BOD and COD levels at Noryangin station, Han river, and also evaluated the effect of release from Paldang dam on them. Monthly BOD and COD data from 1985 to 1991 (7 years) are used for model building and another two year data for model testing. As a result of the study, the effect of improvement on water quality is much more effective combining with the water quality improvement of dam release than considering only increment of dam release in the downstream Han river.

Keywords

References

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