Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Saturation Depth and Slope Stability considering Unsteady Rainfall in Natural Slope

비정상강우를 적용한 자연사면에서의 포화깊이 산정 및 사면안정성 평가

  • 김상훈 (서울대학교 대학원) ;
  • 김성필 (서울대학교 농업생명과학연구원) ;
  • 손영환 (서울대학교 농업생명과학연구원) ;
  • 허준 (서울대학교 대학원) ;
  • 장병욱 (서울대학교 지역시스템공학과)
  • Published : 2007.01.31
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Abstract

In Korea, most landslides occurr during the rainy season and have shallow failure planes parallel to the slope. For these types of rainfall-induced failures, the most important factor triggering slope unstability is decrease in the matric suction of unsaturated soils with increasing saturation depth by rainfall infiltration. For this reason, estimation of cumulative infiltration has a significance. In this study, infiltration rate and cumulative infiltration are estimated by using both Mein & Larson model based on Green-Ampt infiltration model and using modified Mein & Larson model to which unsteady rainfall is applied. According to the results, the modified model is more reasonable than Mein & Larson method itself in estimation of infiltration rate and saturation depth because of considering real pending condition.

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References

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