Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Estimation of Soil Erosion using SATEEC and USPED and Determination of Soil Erosion Hot Spot Watershed

SATEEC과 USPED를 이용한 토양 유실량 산정 및 우선관리 유역 선정 평가

  • Seo, Il Kyu (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Park, Youn Sik (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kim, Nam Won (Korea Institute of Construction Technology) ;
  • Moon, Jong Pil (National Academy of Agriculture Science) ;
  • Ryu, Ji Chul (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Ok, Yong Sik (Department of Biological Environment, Kangwon National University) ;
  • Kim, Ki-Sung (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lim, Kyoung Jae (Department of Regional Infrastructure Engineering, Kangwon National University)
  • 서일규 (강원대학교 지역건설공학과) ;
  • 박윤식 (강원대학교 지역건설공학과) ;
  • 김남원 (한국건설기술연구원) ;
  • 문종필 (농촌진흥청 국립농업과학원) ;
  • 류지철 (강원대학교 지역건설공학과) ;
  • 옥용식 (강원대학교 바이오자원환경학과) ;
  • 김기성 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2010.01.14
  • Accepted : 2010.03.22
  • Published : 2010.05.30
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Abstract

Severe muddy water problem has been the hot issue in Korea. Because of increased nonpoint source pollutions at Kangwon province, best soil erosion management system is required to reduce inflow of nonpoint source pollutions into the waterbodies. The USLE-based SATEEC system have been developed and enhanced for soil erosion and sediment yield estimation. However, the SATEEC cannot estimate soil depositions depending on topography in the watershed, while the USPED estimates soil erosion and deposition using sediment transport capacity of the surface runoff. In this study, the SATEEC and USPED were used to determine soil erosion hot spot subbasins. For this, 54 subbasins were delineated. In general, soil erosion hot spot subbasins were identified similarly with SATEEC and USPED. However, depending on erosion and deposition patterns in each subbasin. USPED estimated soil erosion hot spot subbasins didn't match those estimated with SATEEC. For some subbasins, much deposition was expected than erosion. This indicates that SATEEC estimated soil erosion values may be overestimated for these subbasins. Thus, care should be taken when understanding soil erosion status in the watershed based on USLE-based SATEEC results. In addition, the USPED results could be used to identify the site-specific soil erosion best management practices. If the USPED and USLE-based SATEEC are combined, it would help determining soil erosion hot spot subwatersheds in economic and environmental perspectives.

Keywords

References

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