TITLE

A time-space based approach for mapping rainfall-induced shallow landslide hazard

AUTHOR(S)
Xie, Mowen; Esaki, Tetsuro; Cai, Meifeng
PUB. DATE
October 2004
SOURCE
Environmental Geology;Oct2004, Vol. 46 Issue 6/7, p840
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A rainfall-induced shallow landslide is a major hazard in mountainous terrain, but a time-space based approach is still an unsettled issue for mapping rainfall-induced shallow landslide hazards. Rain induces a rise of the groundwater level and an increase in pore water pressure that results in slope failures. In this study, an integrated infinite slope analysis model has been developed to evaluate the influence of infiltration on surficial stability of slopes by the limit equilibrium method. Based on this new integrated infinite slope analysis model, a time-space based approach has been implemented to map the distributed landslide hazard in a GIS (Geographic Information Systems) and to evaluate the shallow slope failure induced by a particular rainfall event that accounts for the rainfall intensity and duration. The case study results in a comprehensive time-space landslide hazard map that illustrates the change of the safety factor and the depth of the wetting front over time.
ACCESSION #
15399385

 

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