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Water Quality Modeling of Youngju Dam Reservoir by HSPF, EFDC and WASP

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2010, 19(5), pp.465-473
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

Jae Chung Park 1 최재훈 2 Youngil Song 3 DONGIL SEO 4 송상진 1

1한국수자원공사
2㈜엠큐빅
3한국환경정책·평가연구원
4충남대학교

Accredited

ABSTRACT

This study was carried out to investigate the effect of EFDC hydrodynamic result on the WASP7.3 water quality modeling result in accordance with the change of number of grid for the dam reservoir to be constructed. The simulated flow and BOD, T-N and T-P loads by the HSPF watershed model was used for boundary conditions and the hydrodynamic modeling results was linked with WASP model to predict future water quality after dam construction. The scenarios for EFDC modeling were composed of Scenario 1(141 grid cells) and Scenario 2(568 grid cells). The results of Scenario 2 showed that BOD, T-N, T-P and Chl-a concentrations were decreased 0.073mg/L(8.5%), 0.032mg/L(2.6%), 0.003mg/L(6.8%), 0.644mg/L(4.2%)compared with those of Scenario 1, respectively. As number of grid cell increased, water quality concentrations were decreased and also it caused the longer running time. Therefore, this study suggests that the consideration of the geometry of water body is more important than the number of grid cells for the prediction of water quality of a dam reservoir in EIA.

Citation status

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