Uncertainty of rainfall-induced landslides considering spatial variability of parameters

Jing Sen Cai; Tian-Chyi J Yeh; E. Chuan Yan; Yong Hong Hao; Shao Yang Huang; Jet Chau Wen

doi:10.1016/j.compgeo.2017.02.009

Uncertainty of rainfall-induced landslides considering spatial variability of parameters

Jing Sen Cai, Tian-Chyi J Yeh, E. Chuan Yan, Yong Hong Hao, Shao Yang Huang, Jet Chau Wen

Hydrology and Water Resources

Research output: Contribution to journal › Article

8 Scopus citations

Abstract

A cross-correlation analysis is conducted to determine the impacts of the heterogeneity of hydraulic conductivity K_s, soil cohesion c′ and soil friction angle (tan φ′) on the uncertainty of slope stability in time and space during rainfall. We find the relative importance of tan φ′ and c′ depends on the effective stress. While the sensitivity of the stability to the variability of K_s is small, the large coefficient of variation of K_s may exacerbate the variability of pore-water pressure. Therefore, characterizing the heterogeneity of hydraulic properties and pore-water distribution in the field is critical to the stability analysis.

Original language	English (US)
Pages (from-to)	149-162
Number of pages	14
Journal	Computers and Geotechnics
Volume	87
DOIs	https://doi.org/10.1016/j.compgeo.2017.02.009
Publication status	Published - Jul 1 2017

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Keywords

Cross correlation
Hydraulic conductivity
Rainfall infiltration
Shear strength
Slope stability uncertainty
Spatial variability

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Computer Science Applications

Cite this

Cai, J. S., Yeh, T-C. J., Yan, E. C., Hao, Y. H., Huang, S. Y., & Wen, J. C. (2017). Uncertainty of rainfall-induced landslides considering spatial variability of parameters. Computers and Geotechnics, 87, 149-162. https://doi.org/10.1016/j.compgeo.2017.02.009

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abstract = "A cross-correlation analysis is conducted to determine the impacts of the heterogeneity of hydraulic conductivity Ks, soil cohesion c′ and soil friction angle (tan φ′) on the uncertainty of slope stability in time and space during rainfall. We find the relative importance of tan φ′ and c′ depends on the effective stress. While the sensitivity of the stability to the variability of Ks is small, the large coefficient of variation of Ks may exacerbate the variability of pore-water pressure. Therefore, characterizing the heterogeneity of hydraulic properties and pore-water distribution in the field is critical to the stability analysis.",

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AU - Yan, E. Chuan

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AU - Huang, Shao Yang

AU - Wen, Jet Chau

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AB - A cross-correlation analysis is conducted to determine the impacts of the heterogeneity of hydraulic conductivity Ks, soil cohesion c′ and soil friction angle (tan φ′) on the uncertainty of slope stability in time and space during rainfall. We find the relative importance of tan φ′ and c′ depends on the effective stress. While the sensitivity of the stability to the variability of Ks is small, the large coefficient of variation of Ks may exacerbate the variability of pore-water pressure. Therefore, characterizing the heterogeneity of hydraulic properties and pore-water distribution in the field is critical to the stability analysis.

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KW - Hydraulic conductivity

KW - Rainfall infiltration

KW - Shear strength

KW - Slope stability uncertainty

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10.1016/j.compgeo.2017.02.009