New investigations to update the model of the Premana (LC) landslide

Deep seated landslides have historically caused extensive damage to land and structures. These large failures are usually controlled by several triggering factors, and one of the most important is deemed to be the change in pore-water pressure inside the slope. To define the 3D geological model of complex landslides an integrated approach which combines the results of surface and subsurface surveys is often mandatory. This paper aims to present the integrated approach adopted to study the Premana landslide, a deep seated landslide in the North of Italy. The outputs of the geophysical surveys have been combined with geological observations and have been used to model slope stability related to different water table levels in order to define the critical thresholds of pore-water pressure. Considering the complexity of the landslide, the heterogeneity of the geological features and the limitations inherent to each methodology, different approaches were used to study the Premana landslide. © Springer-Verlag Berlin Heidelberg 2013.