Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Improvement of Stream Water Quality by Applying Best Management Practices to Chungjudam Watershed using SWAT Model

SWAT 모형을 이용한 최적관리기법 적용에 따른 충주댐 유역의 하천수질 개선연구

  • 유영석 (건국대학교 대학원 사회환경시스템공학과) ;
  • 박종윤 (건국대학교 대학원 사회환경시스템공학과) ;
  • 신형진 (건국대학교 사회환경시스템공학과) ;
  • 김샛별 (건국대학교 대학원 사회환경시스템공학과) ;
  • 김성준 (건국대학교 사회환경시스템공학과)
  • Received : 2011.08.05
  • Accepted : 2011.12.19
  • Published : 2012.01.31
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Abstract

This study is to assess the reduction of nonpoint source pollution by applying Best Management Practice (BMP) in Chungju-dam watershed (6,585.1 $km^2$) using Soil and Water Assessment Tool (SWAT). The model was calibrated using 3 years (1998-2000) daily streamflow at 3 locations and monthly water quality of sediment (SS), total nitrogen (T-N) and total phosphorus (T-P) data at 2 locations and validated for another 3 years (2001-2003) data. The 5 BMPs of streambank stabilization, porous gully plugs, recharge structures, terrace, and contour farming were applied to stream and area with the specific criteria of previous researches. Through the parameter sensitivity analysis, the farming practice P-factor and Manning's roughness of stream were sensitive. Overall, the NPS reduction effect was high for streambank stabilization, terrace, and contour farming. At the watershed outlet, the SS, T-P, and T-N were reduced by 64.4 %, 62.8 % and 17.6 % respectively.

Keywords

References

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