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Simulation of Turbid Water According to Watershed Runoff and Withdrawal Type in a Constructing Reservoir

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2010, 19(3), pp.247-257
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

Jae Chung Park 1 최재훈 2 Youngil Song 3 유경미 4 강보승 1 송상진 1

1한국수자원공사
2㈜엠큐빅
3한국환경정책·평가연구원
4(주)엠큐빅

Accredited

ABSTRACT

Watershed runoff and turbid water dynamics were simulated in the Youngju Dam, being constructed. The runoff flow and suspended solids were simulated and then thermal stratification and turbid water current in the reservoir were predicted by HSPF and CE-QUALW2model, respectively. Considering selective withdrawal, we hypothesized 3 withdrawal types from the dam, i.e. surface layer, middle layer and the lowest layer. The maximum concentration of SS was 400mg/L in reservoir and it was decreased by the withdrawal. The inflowed turbid water fell to 30 NTU after 12 days regardless of the withdrawal types, but the surface layer withdrawal was a better type at turbid water discharge than the others. In current environmental impact assessment(EIA), we concluded that runoff and reservoir water quality predicted by HSPF and CE-QUAL-W2 was desirable, and appropriate parameters were selected by continous monitoring after EIA.

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