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Quantitative Estimation of Pollution Loading from Hwaseong Watershed using BASINS/HSPF

BASINS/HSPF를 이용한 화성유역 오염부하량의 정량적 평가

  • 정광욱 (건국대학교 대학원 환경과학과) ;
  • 윤춘경 (건국대학교 환경과학과) ;
  • 장재호 (건국대학교 대학원 환경과학과) ;
  • 김형철 (건국대학교 대학원 환경과학과)
  • Published : 2007.03.31

Abstract

A mathematical modeling program called Hydrological Simulation Program-FORTRAN (HSPF) developed by the United States Environmental Protection Agency (EPA) was applied to Hwaseong watershed. It was run under BASINS (Better Assessment Science for Integrating Point and Nonpoint Sources) program, and the model was validated using monitoring data of $2002{\sim}2005$. The model efficiency of runoff ranged from good to fair in comparison between simulated and observed data, while it was from very good to poor in the water quality parameters. But its reliability and performance were within the expectation considering complexity of the watershed and pollutant sources. The nonpoint source (NPS) loading for T-N and T-P during the monsoon rainy season (June to September) was about 80% of total NPS loading, and runoff volume was also in a similar range. However, NPS loading for BOD ($55{\sim}60%$) didn't depend on rainfall because BOD was mostly discharged from point source (more than 70%). And water quality was not necessarily high during the rainy season, and showed a decreasing trend with increasing water flow. BASINS/HSPF was applied to the Hwaseong watershed successfully without difficulty, and it was found that the model could be used conveniently to assess watershed characteristics and to estimate pollutant loading including point and nonpoint sources in watershed scale.

Keywords

References

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