Articles | Volume 22, issue 10
Research article
05 Oct 2022
Research article |  | 05 Oct 2022

Finite-hillslope analysis of landslides triggered by excess pore water pressure: the roles of atmospheric pressure and rainfall infiltration during typhoons

Lucas Pelascini, Philippe Steer, Maxime Mouyen, and Laurent Longuevergne

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Cited articles

Baum, R. L., Godt, J. W., and Savage, W. Z.: Estimating the timing and location of shallow rainfall-induced landslides using a model for transient, unsaturated infiltration, J. Geophys. Res.-Earth, 115, F03013,, 2010. 
Bernard, T. G., Lague, D., and Steer, P.: Beyond 2D landslide inventories and their rollover: synoptic 3D inventories and volume from repeat lidar data, Earth Surf. Dynam., 9, 1013–1044,, 2021. 
Berti, M. and Simoni, A.: Observation and analysis of near-surface pore-pressure measurements in clay-shales slopes, Hydrol. Process., 26, 2187–2205,, 2012. 
Budhu, M. and Gobin, R.: Slope instability from ground-water seepage, J. Hydraul. Eng., 122, 415–417,, 1996. 
Calcaterra, D. and Parise, M.: Weathering as a predisposing factor to slope movements: An introduction, Geol. Soc. Eng. Geol. Spec. Publ., 23, 1–4,, 2010. 
Short summary
Landslides represent a major natural hazard and are often triggered by typhoons. We present a new 2D model computing the respective role of rainfall infiltration, atmospheric depression and groundwater in slope stability during typhoons. The results show rainfall is the strongest factor of destabilisation. However, if the slope is fully saturated, near the toe of the slope or during the wet season, rainfall infiltration is limited and atmospheric pressure change can become the dominant factor.
Final-revised paper