A particularly dangerous hazard is represented by flow-like mass movements involving volcanic soils. Notwithstanding their similar consequences, such phenomena can be characterised by different first and post-failure mechanisms, in relation with regional, seasonal and local features, triggering factors and mechanisms, soil properties, boundary conditions and so on. The present paper analyses the first-failure stage of landslides triggered by rainfall, focusing the attention on Southern Italy, where a large area is covered by pyroclastic soils originated by different volcanic apparata. On the basis of the available data set, the landslides intensity, frequency and consequences proved to be strictly related to the geological setting, where the triggering mechanisms result quite different during the hydrological year. Hence, referring to the spring season and to a sample area where several triggering mechanisms have been recognised, the paper evidences the potentialities of a multidisciplinary approach towards an appropriate back-analysis of occurred phenomena, that represents a fundamental step for an adequate hazard assessment.
A particularly dangerous hazar …
AUTORI: Cascini L., Cuomo S., Sorbino G. RIG ANNO: 2004 NUMERO: 4 Numero di pagina: 11