Influence of Rainfall Patterns on the Instability of Slopes
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.
Author: Muntohar, A.S.,
Ikhsan, J., Liao, H.J
Journal Code: jptsipilgg130020
