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EARLY WARNING THRESHOLDS FOR PARTIALLY SATURATED SLOPES IN VOLCANIC ASHES (2013)
Rainfall-induced landslides in steep soil slopes of volcanic origin are a major threat to human lives and infrastructure. In the context of constructing early warning systems in regions where extensive data on landslide occurrences and associated rainfall are inexistent, physically-based tools offer the possibility to establish thresholds for measurable field quantities. In this paper, a combined finite element infinite slope model is presented to study the transient hydraulic response of volcanic ash slopes to a series of rainfall events and to estimate seasonal safety factors. Furthermore, analytical considerations of partially
saturated infinite slopes are made to define capillary stress thresholds for a landslide early warning system.
Computers and Geotechnics 49 (2013) 79–89
Laboratory for Soil Mechani cs (LMS), Switzerland