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A Study on Water Quality Modeling for Autochthonous BOD Effect in Namgang Dam Downstream

자생 BOD 영향에 따른 남강댐 하류부 수질모델링 연구

  • Hwang, Soo Deok (Korea Institute of Water end Environment, K-water) ;
  • Lee, Sung Jun (Water Environment Research Dept., National Institute of Environmental Research) ;
  • Kim, Young Do (Department of Environmental Engineering, Inje University) ;
  • Kwon, Jae Hyun (Department of Environmental Engineering, Inje University)
  • 황수덕 (한국수자원공사 K-water연구원) ;
  • 이성준 (국립환경과학원 물환경연구부) ;
  • 김영도 (인제대학교 환경공학과(낙동강유역환경연구센터)) ;
  • 권재현 (인제대학교 환경공학과)
  • Received : 2012.02.12
  • Accepted : 2013.01.07
  • Published : 2013.04.30

Abstract

The TMDL, the watershed-oriented water quality management policy, was introduced to inhibit the total amount of pollutant loading generation, and to develop the region environmentally friendly. However, despite the implementation of TMDL, the water quality of Nam river downstream has worsened continuously since 2005. Diverse pollution sources such as cities and industrial zone are scattered around the Nam river. Eutrophication are caused due to deterioration of water quality by low velocity. BOD concentrations in the eutrophic waters affected by the incoming BOD and the autochthonous BOD by the production of phytoplankton. In this study, the quantitative relation of incoming BOD and autochthonous BOD was analyzed for water quality management. The influence of autochthonous BOD was analyzed using QUALKO2 and QUAL2E. Considering the effects of Chl.a, BOD concentration from QUALKO2 model simulations is higher than BOD concentration from QUAL2E model. The results of QUALKO2 showed higher correlation with the measured data. Autochthonous BOD needs to be managed to solve the water pollution problem of Nam river downstream, which is looking for ways to reduce Chl.a by using the increase of the dam outflow and the improvement of the water quality from WWTP.

Acknowledgement

Grant : 남강하류 정체수역의 자생BOD 기여도 및 수질영향 평가

Supported by : 경남녹색환경지원센터

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