Italy is highly subject to geo-hydrological risk, and in particular to landslide risk. Even though slope movements may be caused by several causes, most of landslide events in Italy are triggered by rainfall. Determining the amount of precipitation needed to cause landslides is therefore a fundamental task (GUZZETTI et al., 2008). Landslides triggered by intense rainfall are generally shallow and develop in a short period of activity (from few minutes to few days - GUZZETTI et al., 2007). For a given study area, the determination of empirical rainfall thresholds can be carried out through the analysis of rainfall events that induced landslides. Such thresholds can be defined in terms of duration (D, in h), intensity (I in mm/h) and cumulated rainfall (E, in mm). An empirical threshold can be defined as the amount of rainfall that, when reached or exceeded, is likely to trigger landslides. Thresholds can be identified both through process-based models or statistical analysis (COROMINAS, 2000; CROSTA & FRATTINI, 2001; ALEOTTI, 2004; WIECZOREK & GLADE, 2005).
Preliminary rainfall thresholds for shallow landslides in Calabria
Vennari C.;Brunetti M. T.;Peruccacci S.;Luciani S.;Valigi D.;Antronico L.;Gariano S. L.;Iovine G.;Terranova O. G.;Guzzetti F.
2012
Abstract
Italy is highly subject to geo-hydrological risk, and in particular to landslide risk. Even though slope movements may be caused by several causes, most of landslide events in Italy are triggered by rainfall. Determining the amount of precipitation needed to cause landslides is therefore a fundamental task (GUZZETTI et al., 2008). Landslides triggered by intense rainfall are generally shallow and develop in a short period of activity (from few minutes to few days - GUZZETTI et al., 2007). For a given study area, the determination of empirical rainfall thresholds can be carried out through the analysis of rainfall events that induced landslides. Such thresholds can be defined in terms of duration (D, in h), intensity (I in mm/h) and cumulated rainfall (E, in mm). An empirical threshold can be defined as the amount of rainfall that, when reached or exceeded, is likely to trigger landslides. Thresholds can be identified both through process-based models or statistical analysis (COROMINAS, 2000; CROSTA & FRATTINI, 2001; ALEOTTI, 2004; WIECZOREK & GLADE, 2005).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
