Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Simulation of Turbid Water in the Stratified Daecheong Reservoir during Gate Operation

댐 배수조작에 따른 저수지내 탁수변화 모의 - 대청댐을 대상으로 -

  • Lee, Jae-Yil (Department of Urban Engineering, Chungbuk National University) ;
  • Seo, Se-Deok (Department of Urban Engineering, Chungbuk National University) ;
  • Lee, Gyu-Sung (Department of Urban Engineering, Chungbuk National University) ;
  • Ha, Sung-Ryong (Department of Urban Engineering, Chungbuk National University)
  • Received : 2009.10.08
  • Accepted : 2009.12.21
  • Published : 2009.12.31
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Abstract

Due to severe flooding, the long-term residence of turbidity flows within the stratified Daecheong Reservoir have lengthened. A long-term residence of turbidity flows within the stratified Daecheong Reservoir after floods has been major environmental issue. The objective of this study was to assess the impact to water supply from the hydrodynamics and turbidity outflow. Two gate operation scenarios were investigated. Scenario A refers to gate operations according to rainfall events, and scenario B refers to gate operations according to inflow. From the results of secenario A, the SS concentrations decreased from 0.44mg/l to 0.54mg/l at the front of the dam, whereas SS concentrations increased from 0.24mg/l to 1.24mg/l at the intake points at Munhi and Daejeon. From the results of scenario B, the SS concentrations decreased from 0.61mg/l to 0.83mg/l at the front of Dam; howeve, SS concentrations also decreased from 0.16mg/l to 0.48mg/l at the intake points at Munhi and Daejeon. It seems that it may be more efficient to control turbidity by creating additional outflows of generated discharge after intensive rainfalls than not.

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