Predicting Rainfall-Induced Slope Instability.

Fourie, Andries

doi:10.1680/igeng.1996.28757

Cited by 92 publications

(36 citation statements)

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“…These occurrences often result in serious impacts such as economic loss, infrastructure damages, environmental deterioration, and fatalities. Although vast number of studies [1,2,3,4,5,6,7,8,9] have indicated rainfall events as a primary cause of slope failures, soil properties also contributed to this slope failure mechanism such as different failure mechanisms typically taking place between in Hong Kong and Singapore. The slope failures in Hong Kong generally occur under short and intense rainfall (Brand et al, 1984) but typically very long and less intense rainfall induces the slope instability in Singapore [8,10,11].…”

Section: Introductionmentioning

confidence: 99%

Rainfall-induced Failures of Residual Soil Slopes with Spatial Variability of Hydraulic Conductivity

Suradi¹

2016

Intek

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Abstract-The aim of this paper was to examine the effect of spatial variability of hydraulic conductivity, commonly existing in nature, on rainfall-induced failures of residual soil slopes. Parametric study was carried out at typically residual soil slopes with two distinctively different types of hydraulic conductivity, high (k s =10 -4 m/s) and low (k s =10 -6 m/s) conductivity, in Singapore. Finite element method was applied in this slope stability analysis using commercial SVFlux and SVSlope software in a couple manner. Rainfall intensity was varied as a fraction of the hydraulic conductivity. As a result, greater spatial variability of saturated hydraulic conductivity affects more noticeably the instability of both high and low-conductivity soil slopes exposed to high-rainfall intensity (I > 0.05 k s for high-conductivity slopes and I >1 k s for low-conductivity slopes). However, there was a negligible effect of spatial variability of hydraulic conductivity on the instability of slopes subjected to low-rainfall intensity, even this spatial variability tended to slightly increase the stability of high-conductivity slopes.

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Section: Introductionmentioning

confidence: 99%

Rainfall-induced Failures of Residual Soil Slopes with Spatial Variability of Hydraulic Conductivity

Suradi¹

2016

Intek

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“…There are many approaches in the literature to relate cumulative rainfall and landslides, diverging in the quantity of days to be considered (e.g. [2][3][4][5][6][7][8][9]). The surface soil layers behave as dynamic systems that interact with the atmosphere and the deeper layers, making it necessary to consider the climate-soilvegetation system, to understand the landslide problem.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic assessment of precipitation-triggered landslides: the role of vegetation

2016

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Abstract. Landslides triggered by rainfall are one of the most common causes of disaster in tropical regions, characterized by having deep weathering soil profiles, steep slopes and high-intensity storms. The increasing number of landslides during wet season evidences the close relationship between hydro-climatic conditions as a triggering factor for the occurrence of landslides. In addition, the type of vegetation covering the slope affects the soil shear strength by the roots reinforcement, plants weight and changes in soil moisture due to transpiration and interception. This paper proposes a probabilistic methodology to study the slope stability on the long-term, considering different hydro-climatic conditions and the effect of vegetation cover in the soil moisture. The ecohydrological model developed by Rodríguez-Iturbe et al.[1] was used to determine the boundary conditions of the problem. To generate the pore pressure field, the flow equation was solved using the Finite Element Method and Finite Differences Method. Finally, the Limit Equilibrium Method was used to find the Factor of Safety. The stability of a hypothetical slope under certain hydro-climatic conditions and two types of vegetation was evaluated. The analysis showed that it is more likely that a grass-covered slope slides than a tree-covered slope, and that the average FS of the slope during wet and dry season is very similar, but the FS dispersion is higher when the probability and intensity of rainfall events increases.

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“…Storm-induced landslides are common in many regions under tropical or subtropical climates, such as Hong Kong, Taiwan, Singapore, Japan and Brazil (Brand, 1984;Fourie, 1996). These slope failures may occur on natural slopes in a variety of materials, including residual and colluvial soils (Dai et al, 2003;Fourie, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…These slope failures may occur on natural slopes in a variety of materials, including residual and colluvial soils (Dai et al, 2003;Fourie, 1996). Fill slopes, cut slopes and embankments may also be prone to this type of slope failure (Chen et al, 2004;Day and Axten, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Stability analysis of rainfall-induced slope failure: a review

Zhang

et al. 2011

Proceedings of the Institution of Civil Engineers - Geotechnica

229

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Rainfall is one of the most significant triggering factors for slope failures in many regions around the world.Numerous research studies have been conducted to investigate infiltration of rainwater into a slope, and the effect of water infiltration on slope stability. In this paper, a review of existing research on infiltration analysis and slope stability analysis under rainfall infiltration is presented. Studies on infiltration analysis with conceptual models, analytical analysis and numerical modelling are first reviewed. The typical pore water pressure profiles in the slope are then discussed. Subsequently, recent developments in analyses of slope instabilities under rainfall conditions using the limit equilibrium method and coupled hydro-mechanical modelling are summarised, and major findings on critical hydrological factors related to rainfall-induced landslides are summarised and discussed. Finally, several research topics are suggested for further study.

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Predicting Rainfall-Induced Slope Instability.

Cited by 92 publications

References 0 publications

Rainfall-induced Failures of Residual Soil Slopes with Spatial Variability of Hydraulic Conductivity

Rainfall-induced Failures of Residual Soil Slopes with Spatial Variability of Hydraulic Conductivity

Probabilistic assessment of precipitation-triggered landslides: the role of vegetation

Stability analysis of rainfall-induced slope failure: a review

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