Probabilistic analysis of landslide potential of an inclined uniform soil layer of infinite length: theorem

Chen, Jinn Chyi; Jan, Chyan Deng

doi:10.1007/s00254-006-0417-8

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…Since a large amount of loose sediment with lower soil strength was deposited on streambeds or hillsides after the earthquake, much lower pore water pressure or rainfall was required to initiate the movement of this sediment (Lin et al, 2003;Chen et al, 2007;Chen and Jan, 2008). Therefore, the critical RI for debris flow occurrence dropped sharply in the subsequent early years, to 2 cm 2 h −1 .…”

Section: Influence Of Rainfall Variation On Debris Flows Occurrencementioning

confidence: 99%

Characteristics of rainfall triggering of debris flows in the Chenyulan watershed, Taiwan

Chen

Jan

Huang

2013

Nat. Hazards Earth Syst. Sci.

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This paper reports the variation in rainfall characteristics associated with debris flows in the Chenyulan watershed, central Taiwan, between 1963 and 2009. The maximum hourly rainfall I_m, the maximum 24 h rainfall R_d, and the rainfall index RI (defined as the product R_dI_m) were analysed for each rainfall event that triggered a debris flow within the watershed. The corresponding number of debris flows initiated by each rainfall event (N) was also investigated via image analysis and/or field investigation. The relationship between N and RI was analysed. Higher RI of a rainfall event would trigger a larger number of debris flows. This paper also discusses the effects of the Chi-Chi earthquake (CCE) on this relationship and on debris flow initiation. The results showed that the critical RI for debris flow initiation had significant variations and was significantly lower in the years immediately following the CCE of 1999, but appeared to revert to the pre-earthquake condition about five years later. Under the same extreme rainfall event of RI = 365 cm² h⁻¹, the value of N in the CCE-affected period could be six times larger than that in the non-CCE-affected periods

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Section: Influence Of Rainfall Variation On Debris Flows Occurrencementioning

confidence: 99%

Characteristics of rainfall triggering of debris flows in the Chenyulan watershed, Taiwan

Chen

Jan

Huang

2013

Nat. Hazards Earth Syst. Sci.

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“…To improve efficiency, the first-order second-moment method and the point-estimate method have been used to estimate failure probability. Chen et al (2007) applied the first-order second-moment method to assess the probability of an infinite slope failure. Park et al (2012) used the point-estimate method to evaluate the failure probability of a rock wedge.…”

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confidence: 99%

Probabilistic modeling of rainfall-induced shallow landslide using a point-estimate method

Tsai

Yang

2014

Environ Earth Sci

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The assessment of rainfall-induced shallow landslides using a physical-based model requires accounting for the uncertainty of soil parameters that cannot be accurately quantified. In this study, the modified Iverson model was integrated with the Rosenblueth point-estimate method to probabilistically model rainfall-induced shallow landslides, while simultaneously considering the uncertainty and correlation of soil parameters. Using various soil parameters, hillslope conditions, and hydrological conditions, the applicability of the Rosenblueth point-estimate method was compared with that of the Monte Carlo simulation method. The simulated results indicated that the Rosenblueth point-estimate method can accurately and efficiently assess the probability of rainfall-induced shallow landslides. A lognormal distribution of the safety factor can be assumed when the soil parameters are lognormally distributed random variables. Accounting for the correlation of soil parameters decreases the standard deviation of the safety factor, but does not affect the mean of the safety factor. Neglecting the correlation of soil parameters could substantially misestimate the probability of rainfall-induced shallow landslides.

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Probabilistic analysis of landslide potential of an inclined uniform soil layer of infinite length: application

Chen¹,

Jan²

2007

Environ Geol

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Probabilistic analysis of landslide potential of an inclined uniform soil layer of infinite length: theorem

Cited by 6 publications

References 4 publications

Characteristics of rainfall triggering of debris flows in the Chenyulan watershed, Taiwan

Characteristics of rainfall triggering of debris flows in the Chenyulan watershed, Taiwan

Probabilistic modeling of rainfall-induced shallow landslide using a point-estimate method

Probabilistic analysis of landslide potential of an inclined uniform soil layer of infinite length: application

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