Instability of partially saturated soil slopes due to alteration of rainfall pattern

Jaehong Kim, Sang Seom Jeong, Richard A. Regueiro

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The influence of climate change on rainfall patterns has the potential to alter stability of partially saturated soil slopes. Changes in rainfall patterns have a strong influence on stability of partially saturated soil slopes, which recently have resulted in shallow landslides. In this paper, slope stability is assessed using a monolithically-coupled finite element model for a deformable partially saturated soil subjected to surface infiltration of water. Numerical analysis solves for the matric suction distribution over a two-dimensional cross-section of a soil slope while varying permeability, and considering a surface layer of soil with different permeability. The formulation of hydraulic conductivity for a coupled analysis includes dependence on porosity and degree of saturation to illustrate the effects of water infiltration and deformation behavior in partially saturated soils. Numerical examples demonstrate that change in rainfall patterns may trigger slope instability earlier in the rainfall event than for rainfall events of the past. Assessment of these simulations can provide an indication of the potential influence of climate change on shallow landslides in many mountainous areas in South Korea.

Original languageEnglish
Pages (from-to)28-36
Number of pages9
JournalEngineering Geology
Volume147-148
DOIs
Publication statusPublished - 2012 Oct 12

Fingerprint

Rain
Soils
rainfall
soil
Landslides
Infiltration
Climate change
landslide
infiltration
permeability
climate change
Slope stability
Hydraulic conductivity
slope stability
suction
Numerical analysis
hydraulic conductivity
Water
surface layer
cross section

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

@article{376ca9184a3c4da08187cfe1570e675d,
title = "Instability of partially saturated soil slopes due to alteration of rainfall pattern",
abstract = "The influence of climate change on rainfall patterns has the potential to alter stability of partially saturated soil slopes. Changes in rainfall patterns have a strong influence on stability of partially saturated soil slopes, which recently have resulted in shallow landslides. In this paper, slope stability is assessed using a monolithically-coupled finite element model for a deformable partially saturated soil subjected to surface infiltration of water. Numerical analysis solves for the matric suction distribution over a two-dimensional cross-section of a soil slope while varying permeability, and considering a surface layer of soil with different permeability. The formulation of hydraulic conductivity for a coupled analysis includes dependence on porosity and degree of saturation to illustrate the effects of water infiltration and deformation behavior in partially saturated soils. Numerical examples demonstrate that change in rainfall patterns may trigger slope instability earlier in the rainfall event than for rainfall events of the past. Assessment of these simulations can provide an indication of the potential influence of climate change on shallow landslides in many mountainous areas in South Korea.",
author = "Jaehong Kim and Jeong, {Sang Seom} and Regueiro, {Richard A.}",
year = "2012",
month = "10",
day = "12",
doi = "10.1016/j.enggeo.2012.07.005",
language = "English",
volume = "147-148",
pages = "28--36",
journal = "Engineering Geology",
issn = "0013-7952",
publisher = "Elsevier",

}

Instability of partially saturated soil slopes due to alteration of rainfall pattern. / Kim, Jaehong; Jeong, Sang Seom; Regueiro, Richard A.

In: Engineering Geology, Vol. 147-148, 12.10.2012, p. 28-36.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Instability of partially saturated soil slopes due to alteration of rainfall pattern

AU - Kim, Jaehong

AU - Jeong, Sang Seom

AU - Regueiro, Richard A.

PY - 2012/10/12

Y1 - 2012/10/12

N2 - The influence of climate change on rainfall patterns has the potential to alter stability of partially saturated soil slopes. Changes in rainfall patterns have a strong influence on stability of partially saturated soil slopes, which recently have resulted in shallow landslides. In this paper, slope stability is assessed using a monolithically-coupled finite element model for a deformable partially saturated soil subjected to surface infiltration of water. Numerical analysis solves for the matric suction distribution over a two-dimensional cross-section of a soil slope while varying permeability, and considering a surface layer of soil with different permeability. The formulation of hydraulic conductivity for a coupled analysis includes dependence on porosity and degree of saturation to illustrate the effects of water infiltration and deformation behavior in partially saturated soils. Numerical examples demonstrate that change in rainfall patterns may trigger slope instability earlier in the rainfall event than for rainfall events of the past. Assessment of these simulations can provide an indication of the potential influence of climate change on shallow landslides in many mountainous areas in South Korea.

AB - The influence of climate change on rainfall patterns has the potential to alter stability of partially saturated soil slopes. Changes in rainfall patterns have a strong influence on stability of partially saturated soil slopes, which recently have resulted in shallow landslides. In this paper, slope stability is assessed using a monolithically-coupled finite element model for a deformable partially saturated soil subjected to surface infiltration of water. Numerical analysis solves for the matric suction distribution over a two-dimensional cross-section of a soil slope while varying permeability, and considering a surface layer of soil with different permeability. The formulation of hydraulic conductivity for a coupled analysis includes dependence on porosity and degree of saturation to illustrate the effects of water infiltration and deformation behavior in partially saturated soils. Numerical examples demonstrate that change in rainfall patterns may trigger slope instability earlier in the rainfall event than for rainfall events of the past. Assessment of these simulations can provide an indication of the potential influence of climate change on shallow landslides in many mountainous areas in South Korea.

UR - http://www.scopus.com/inward/record.url?scp=84865049646&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865049646&partnerID=8YFLogxK

U2 - 10.1016/j.enggeo.2012.07.005

DO - 10.1016/j.enggeo.2012.07.005

M3 - Article

AN - SCOPUS:84865049646

VL - 147-148

SP - 28

EP - 36

JO - Engineering Geology

JF - Engineering Geology

SN - 0013-7952

ER -