Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

Determination of Model Parameters of Surface Cover Materials in Evaluation of Sediment Reduction and Its Effects at Watershed Scale using SWAT

토양유실 저감을 위한 지표피복 저감효과 변수 결정 및 SWAT 모형 유역단위 효과 분석

  • Kum, Donghyuk (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Jang, Chun Hwa (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Shin, Min Hwan (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Choi, Joong-Dae (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Kim, Bomchul (Department of Environmental science, Kangwon National University) ;
  • Jeong, Gyo-Cheol (Department of Earth and Environmental Sciences, Andong National University) ;
  • Won, Chul Hee (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Lim, Kyoung Jae (Department of Regional Infrastructures Engineering, Kangwon National University)
  • 금동혁 (강원대학교 지역건설공학과) ;
  • 장춘화 (강원대학교 지역건설공학과) ;
  • 신민환 (강원대학교 지역건설공학과) ;
  • 최중대 (강원대학교 지역건설공학과) ;
  • 김범철 (강원대학교 환경과학과) ;
  • 정교철 (안동대학교 지구환경과학과) ;
  • 원철희 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Published : 2012.11.30
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Abstract

The purpose of this study was to determine parameters of surface cover materials and evaluation the effects on runoff and sediment reductions with rice straw mat with PAM at watershed scale using the SWAT model. In this study, 1) regression equation of CN for rice straw mat + PAM using SCS curve number method was developed, 2) the USLE P factor, being able to reflect simulation of rice straw mat + PAM in the agricultural field, was estimated for various slope scenarios with VFSMOD-w. Then regression equation for CN and USLE P factor were used as input data in the SWAT model. Assuming rice straw mat + PAM is applied to radish and potato fields, occupying 24% of agricultural fields at the study watershed. Result of direct runoff without rice straw mat + PAM was $65,964,368\;m^3,$ with rice straw mat + PAM, direct runoff was $65,637,336\;m^3$, $327,031.8\;m^3$ reductions compared without it. Also, result of sediment without rice straw mat + PAM was 163,531 ton, with rice straw mat + PAM, sediment was 84,779 ton, 78,752 ton reduction compared without it. This analysis showed that about 48% sediment reductions would be expected with rice straw mat + PAM. As shown in this study, rice straw mat + PAM would be used as an efficient site-specific BMPs to reduce runoff and sediment discharge from field.

Keywords

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