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| Titel |
Analysis of landslide triggering conditions in the Sarno area using a physically based model |
| VerfasserIn |
G. Capparelli, P. Versace |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 18, no. 8 ; Nr. 18, no. 8 (2014-08-27), S.3225-3237 |
| Datensatznummer |
250120448
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| Publikation (Nr.) |
 copernicus.org/hess-18-3225-2014.pdf |
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| Zusammenfassung |
Rainfall is recognized as a major precursor of many types of slope
movements. The technical literature reports both study cases and models of
landslides induced by rainfall. Subsurface hydrology has a dominant role
since changes in the soil water content significantly affect the soil shear
strength. The analytical approaches used are very different, ranging from
statistical models to distributed and complete models. The latter take
several components into account, including specific site conditions,
mechanical, hydraulic and physical soil properties, local seepage conditions,
and the contribution of these to soil strength.
This paper reports a study using a complete model, named SUSHI (Saturated
Unsaturated Simulation for Hillslope Instability), to simulate the role of
subsurface hydrology in rain-induced landslides, on a case of great interest
both in terms of its complexity and its severity.
The landslide-prone area in question is located in Campania (southern Italy), where
disastrous mudflows occurred in May 1998. The region has long been affected
by rainfall-induced slope instabilities, which often involve large areas and
affect many people. The application allows a better understanding of the role
of rainfall infiltration and suction changes in the triggering mechanism of
the phenomena. These changes must be carefully considered when assessing
hazard levels and planning mitigation interventions regarding slope
stability. |
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