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Evaluation of SWAT Flow and Sediment Estimation and Effects of Soil Erosion Best Management Practices

SWAT모형을 이용한 유량 및 유사 예측 정확성 평가 및 최적관리 기법 효과 분석

  • 이지민 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 류지철 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 강현우 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 강형식 (한국환경정책.평가연구원) ;
  • 금동혁 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 장춘화 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 최중대 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2011.11.28
  • Accepted : 2012.01.17
  • Published : 2012.01.31

Abstract

Soil erosion and sediment from agricultural farmland has caused various negative impacts on environment in recent years. The effect of rice straw mat on soil erosion has been investigated by many researchers these days. In this study, the SWAT model was applied to Hongcheon watershed to evaluate SWAT flow and sediment, and the effect of rice straw mat on sediment yield at watershed outlet was evaluated. The Nash-Sutcliffe model efficiency (NSE) and coefficient of determination ($R^2$) values for flow simulation (calibration period) were 0.66 and 0.67, and the NSE values for sediment was 0.90. The calibrated parameters were used to analyze the reduction of sediment yield in the farmland with rice straw mat. Average daily sediment yield without rice straw mat was 49.8 ton/day and sediment yield with rice straw mat was 25.5 ton/day, and the reduction rate was 38.7 %. Also, average daily sediment yield with/without rice straw mat were 97.5 ton/day and 190.7 ton/day during the rainy season (Jun. 2008 - Aug. 2009), with the reduction rate 46.3 %.

Keywords

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  2. Using the SWAT model to improve process descriptions and define hydrologic partitioning in South Korea vol.18, pp.2, 2014, https://doi.org/10.5194/hess-18-539-2014