In a wide area of Campania, characterised by mountain ridges covered by pyroclastic deposits, landslides occur after intense rainstorms that follow an accumulation of a certain amount of prestorm seasonal rainfall. Instabilities begin as soil slides, and evolve to debris avalanche-flow along steep slopes. This study extends the hydrological analyses carried out by FIORILLO & WILSON (2004) on these landslides. Further 10-years of rainfall records allow to verify a previous hypothesis on the soil moisture accumulation into the soil. Analyses have been focused in the Sarno area (P.zzo d’Alvano), where a high-elevation rain-gauge is available since 1998, which allows also to compare data with lowelevation rain gauges. Analyses show that numerous large-scale debris flows induced by the May 1998 storm depend heavily on the antecedent rainfall distribution and on the soil moisture storage characteristics.

Further hydrological analyses on landslide initiation in the Sarno area (Italy)

Fiorillo F;Esposito L;Revellino P;Guadagno FM
2013

Abstract

In a wide area of Campania, characterised by mountain ridges covered by pyroclastic deposits, landslides occur after intense rainstorms that follow an accumulation of a certain amount of prestorm seasonal rainfall. Instabilities begin as soil slides, and evolve to debris avalanche-flow along steep slopes. This study extends the hydrological analyses carried out by FIORILLO & WILSON (2004) on these landslides. Further 10-years of rainfall records allow to verify a previous hypothesis on the soil moisture accumulation into the soil. Analyses have been focused in the Sarno area (P.zzo d’Alvano), where a high-elevation rain-gauge is available since 1998, which allows also to compare data with lowelevation rain gauges. Analyses show that numerous large-scale debris flows induced by the May 1998 storm depend heavily on the antecedent rainfall distribution and on the soil moisture storage characteristics.
Landslide; rainfall; pyroclastic deposit, Campania
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12070/636
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