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Ikhsan, J.
Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta
Civil Engineering, Building, Construction & Architecture

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Influence of Rainfall Patterns on the Instability of Slopes Muntohar, A.S.; Ikhsan, J.; Liao, H.J.
Civil Engineering Dimension Vol. 15 No. 2 (2013): SEPTEMBER 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (657.952 KB) | DOI: 10.9744/ced.15.2.120-128

Abstract

The assessment of rainstorm-induced shallow landslides is still a research topic of wide concern for scientists and engineers. This paper examined the effect of rainfall intensity distribution on shallow landslides. Four synthetic rainfall distributions comprising uniformed, delayed, centralized, and advanced, were selected to examine the effect of rainstorm patterns on slope failure. The infiltration was modeled using Green-Ampt equation, while an infinite slope was selected to model the shallow landslide. Monte Carlo Simulation was applied to analyze the failure probability of the slopes. Two landslide cases were selected to examine the proposed model. The results indicated that among the four representative rainstorm patterns, the advanced rainfall pattern caused worst slope stability. The advanced rainfall pattern resulted in the shortest rainfall duration threshold for landslide occurrence, followed by the central, uniform, and then delayed rainfall pattern. The probabilistic analysis method was suitable to estimate the time of failure for the evaluated landslide cases.
Co-Authors Liao, H.J. Muntohar, A.S.