The Rosone landslide (Orco river valley, western italian alps): an updated model

Abstract

The Rosone landslide (Western Italian Alps) is a major sliding phenomenon affecting a metamorphic basement and periodically damaging the structures (tunnels and penstocks) of a nearby hydro-power plant. This paper presents the results of a recent study including field geology, seismic surveys and deep boreholes, investigating the poorly known deep structure of the sliding mass, as well as the geometry of the sliding surfaces. A synthetic comparison is made with another large landslide at Mt. Castello, showing some analogies with the Rosone landslide.