Proceedings of the Korea Water Resources Association Conference (한국수자원학회:학술대회논문집)

Korea Water Resources Association (한국수자원학회)
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Soil Erosion Modeling Using RUSLE and GIS on the Imha Watershed

RUSLE 모형을 이용한 임하댐 유역에서의 토양유실량 평가

  • 김현식 (한국수자원공사 수자원관리처) ;
  • ;
  • 염경택 (한국수자원공사 수자원관리처)
  • Published : 2007.05.17
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Abstract

The Imha watershed is vulnerable to severe erosion due to the topographical characteristics such as mountainous steep slopes. The RUSLE model was combined with GIS techniques to analyze the mean annual erosion losses and the soil losses caused by typhoon "Maemi". The model is used to evaluate the spatial distribution of soil loss rates under different land uses. The mean annual soil loss rate and soil losses caused by typhoon "Maemi"were predicted as $3,450\;tons/km^2/year$ and $2,920\;ton/km^2/"Maemi"$, respectively. The sediment delivery ratio was determined to be about 25% from the mean annual soil loss rate and the surveyed sediment deposits in the Imha reservoir in 1997.

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