Multi-stage statistical landslide hazard analysis: Rain-induced landslides

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

3 Scopus citations

Abstract

Recurrence of rain-induced landslides is controlled by the repetition of rain events. Therefore, rainfall induced landslide hazard analysis is more complicated than a conventional rainfall frequency analysis, and requires multi-stage procedures. It requires a susceptibility analysis to divide a region into successive classes at the first stage. Then, the relationship between the probability of landslide failure and rainfall intensity and/or total rainfall of an event for each susceptibility classes may be constructed, and further fit a probability of failure surface using the susceptibility value, rainfall intensity and/or total rainfall as independent variables. Then, frequency analysis for rainfall parameters at different return periods is performed. Finally, an analysis of the spatial probability of landslide failure under a certain return-period rainfall is drawn. This study selects data for Typhoon Haitang induced landslides in the Kaopin river basin as the training data set to perform a susceptibility analysis and a probability of failure surface analysis. A rainfall frequency analysis is also conducted to map different return-period rainfall intensity and 3-day rainfalls. Finally, a rainfall landslide hazard map is provided.

Original languageEnglish
Title of host publicationLandslide Science for a Safer Geoenvironment
Subtitle of host publicationVolume 3: Targeted Landslides
PublisherSpringer International Publishing
Pages291-298
Number of pages8
ISBN (Electronic)9783319049960
ISBN (Print)9783319049953
DOIs
StatePublished - 1 Jan 2014

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