Early warning thresholds for partially saturated slopes in volcanic ashes
نویسندگان
چکیده
0266-352X/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.compgeo.2012.11.002 ⇑ Corresponding author. Tel.: +41 21 693 23 14; fax E-mail addresses: [email protected] (J. [email protected] (A. Ferrari), [email protected] (L. Laloui). 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. 2012 Elsevier Ltd. All rights reserved.
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