Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of the Efficiency of Non-point Source Pollution Managements Considering the Land Use Characteristics of Watersheds

유역의 토지이용 특성을 고려한 비점오염원 관리방안 적용에 따른 저감 효율 분석

  • Choi, Yujin (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lee, Seoro (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kum, Donghyuk (Korea Water Environment Research Institute) ;
  • Han, Jeongho (Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign) ;
  • Park, Woonji (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kim, Jonggun (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lim, Kyoungjae (Department of Regional Infrastructure Engineering, Kangwon National University)
  • 최유진 (강원대학교 지역건설공학과) ;
  • 이서로 (강원대학교 지역건설공학과) ;
  • 금동혁 (한국수계환경연구소) ;
  • 한정호 (일리노이대학교 어바나 샴페인 농업생물공학과) ;
  • 박운지 (강원대학교 지역건설공학과) ;
  • 김종건 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2020.04.01
  • Accepted : 2020.09.28
  • Published : 2020.09.30
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Abstract

Land use change by urbanization has significantly affected the hydrological process including the runoff characteristics. Due to this situation, it has been becoming more complicated to manage non-point source pollutions caused by rainfall. In order to effectively control non-point sources, it is necessary to identify the reduction efficiency of the various management method based on land use characteristics. Thus, the purpose of this study is to analyze the reduction efficiency of non-point source pollution management practices targeting three different watersheds with the different land use characteristics using the Soil and Water Assessment Tool (SWAT). To do this, the vulnerable subwatersheds to non-point source pollution occurrence within each watershed were selected based on the streamflow and water quality simulation results. Then, considering the land use, low impact development (LID) or best management practices (BMPs) were applied to the selected subwatersheds and the efficiency of each management was analyzed. As a result of analysis of the non-point source pollution reduction efficiency, when LID was applied to urban areas, the average reduction efficiencies of SS, NO3-N, and TP were 5.92%, 4.62%, and 10.35%, respectively. When BMPs were applied to rural areas, the average reduction efficiencies of SS, TN and TP were 35.45%, 4.37%, and 10.16%, respectively. The results of this study can be used as a reference for determining appropriate management methods for non-point source pollution in urban, rural, and complex watersheds.

Keywords

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