Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Comparison of Annual Soil Loss using USLE and Hourly Soil Erosion Evaluation System

USLE모형과 시강우를 고려한 토양유실 평가 시스템을 이용한 연간 토양유실량 비교 분석

  • Kum, Dong-Hyuk (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Ryu, Ji-Chul (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Kang, Hyun-Woo (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) ;
  • Shin, Dong-Shuk (National Institute of Environmental Research) ;
  • Choi, Joong-Dae (Department of Regional Infrastructures Engineering, Kangwon National University) ;
  • Lim, Kyoung-Jae (Department of Regional Infrastructures Engineering, Kangwon National University)
  • 금동혁 (강원대학교 지역건설공학과) ;
  • 류지철 (강원대학교 지역건설공학과) ;
  • 강현우 (강원대학교 지역건설공학과) ;
  • 장춘화 (강원대학교 지역건설공학과) ;
  • 신민환 (강원대학교 지역건설공학과) ;
  • 신동석 (국립환경과학원 수질총량연구과) ;
  • 최중대 (강원대학교 지역건설공학과) ;
  • 임경재 (강원대학교 지역건설공학과)
  • Received : 2011.11.18
  • Accepted : 2011.12.13
  • Published : 2011.12.31
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Abstract

Soil erosion and sediment has been known as one of pollutants causing water quality degradation in water bodies. With global warming issues worldwide, various soil erosion studies have been performed. Although on-site monitoring of sediment loss would be an ideal method to evaluate soil erosion condition, modeling approaches have been utilized to estimate soil erosion and to evaluate various best management practices on soil erosion reduction. Although the USLE has been used in soil erosion estimation for the last 40 years, the USLE model has limitations in estimating event-based soil erosion reflecting rainfall intensity and rainfall duration for long-term period. Thus, the calibrated model, capable of simulating soil erosion using hourly rainfall data, was utilized in this study to evaluate the effects of rainfall amount and rainfall intensity on soil erosion. It was found that USLE soil erosion value is $3.06ton\;ha^{-1}\;yr^{-1}$, while soil erosion values from 2006~2010 were $2.469ton\;ha^{-1}\;yr^{-1}$, $0.882ton\;ha^{-1}\;yr^{-1}$, $1.489ton\;ha^{-1}\;yr^{-1}$, $2.158ton\;ha^{-1}\;yr^{-1}$, $1.602ton\;ha^{-1}\;yr^{-1}$, respectively. Especially, soil erosion from single storm event for 2008-2010 would be responsible for 30% or more of annual soil loss. As shown in this study, hourly soil erosion estimation system would provide more detailed output from the study area. In addition, the effects of rainfall intensity on soil erosion could be evaluated with this system.

Keywords

References

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