Analysis of Rainfall-Induced Landslide on Unsaturated Soil Slopes

Sangseom Jeong, Kwangwoo Lee, Junghwan Kim and Yongmin Kim
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Sangseom Jeong: Department of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
Kwangwoo Lee: Department of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
Junghwan Kim: Department of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
Yongmin Kim: Civil and Environmental engineering, Nanyang Technological University, Singapore 639798, Singapore

Sustainability, 2017, vol. 9, issue 7, 1-20

Abstract: This paper investigates rainfall-induced landslides on partially saturated soil slopes using the 2011 Umyeonsan landslides at the center of Seoul, Korea. An integrated analysis of rainfall-induced landslide was carried out through laboratory tests, field tests, and numerical analysis. The results of comprehensive investigations in the Umyeonsan region demonstrate that landslide activity is closely related primarily to rainfall and soil properties and slope geometry, and vegetation. Numerical analysis was also performed to confirm the effect of these factors on landslide occurrence. Special attention was given to rainfall penetration analysis to determine the wetting band depth for shallow and deep-seated slope failure in watershed-scale landslide. The simulated results agree closely with the investigation results, which indicates that the applied method is appropriate for use in the simulation of landslides in unsaturated soils.

Keywords: landslide; unsaturated soil; matric suction; rainfall; Umyeonsan (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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