Numerical Simulations of Water Quality in ManKyong River

QUAL-II E 모델에 의(依)한 만경강(萬頃江)의 수질예측(水質豫測)

  • Shim, Jae-Hwan (Environmental Research Laboratory, Rural Research Institute, Rural Development Corporation) ;
  • Choi, Moon-Sul (Department of Marine Development, Kumsan National University)
  • 심재환 (농어촌진흥공사 농어촌연구원 환경연구실) ;
  • 최문술 (군산대학교 해양개발학과)
  • Published : 1991.06.30

Abstract

The QUAL-II E Model was applied to predict the water quality of the Mankyong drainage System, and lead to following conclusion. 1. The difference between computed and measured BOD at the M-3 (Bakgugeong) station was within 10%, indicating that the application of the QUAL-IIE Model for the prediction of water quality was satisfactory thus far. 2. The application of the model states that the discharge of concentrated pollutants at the M-1 station on the Jeonju stream, located 41Km upstream from the estuary, causes the worst problems. The sluice which extends residence time and enlarges watery surface improves water quality by a Self-purification process at the M-3 station, 28km upstream from the estuary. 3. The accuracy of the model diminished when this model was applied on the estuary downstream of the sluice. Hence, the application of the model on the estuary needs to be used with caution. 4. Among the conputed water quality parameters, BOD is the worst problem. At the M-3 station, BOD is computed to be 26.6 mg/1 in 1996, 30.7 mg/1 in 2,001, 33.0 mg/l in 2006, and 37.5 mg/1 in 2011. When preventive measures against water pollution are not properly exercised, severe problems in irrigation and water resources are expected. This study will be of used in the selection of irrigation water intake points, the criteria of effluent treatment, the management of water resources, and the establishment of water quality managemont policy.

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