Hydro-mechanical features of landslide reactivation in weak clayey rock masses

In the northern Apennines, four representative large and deep seated landslides affecting weak rock masses have been studied before, during and after reactivation events. Semi-continuous and continuous monitoring in the 2004-2006 period included the dormancy, reactivation and suspension phases, allowing some comments to be put forward as regards the hydro-mechanical conditions that drive the reactivations. The data have highlighted the interactions between groundwater and displacement rates in different sections of the slope.