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Sustainability 2017, 9(7), 1280; doi:10.3390/su9071280

Analysis of Rainfall-Induced Landslide on Unsaturated Soil Slopes

1
Department of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
2
Civil and Environmental engineering, Nanyang Technological University, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
Received: 30 May 2017 / Revised: 14 July 2017 / Accepted: 20 July 2017 / Published: 21 July 2017
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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. View Full-Text
Keywords: landslide; unsaturated soil; matric suction; rainfall; Umyeonsan landslide; unsaturated soil; matric suction; rainfall; Umyeonsan
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Jeong, S.; Lee, K.; Kim, J.; Kim, Y. Analysis of Rainfall-Induced Landslide on Unsaturated Soil Slopes. Sustainability 2017, 9, 1280.

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