ABSTRACT
This chapter deals with a tool for landslides susceptibility mapping as a function of the hydrogeological setting. For this purpose, a groundwater parametrical modelling was coupled with a slope stability analysis; the simulation has been carried out changing the values of the main hydrogeological parameters. Usually, the hydrogeological susceptibility to landslides is aimed to point out the pluviometrical thresholds, that can be assessed either through a deterministic approach or through a statistic one. The parametrical modelling was carried out changing some hydrogeological parameters very significant for the slope instability. To summarize the results of parametrical analysis, the safety factor has been plotted versus the piezometrical level simulated with the different hydrogeological settings. The knowledge of the slope hydrogeological setting is very important to study the effects of the groundwater flow on landslide susceptibility. The groundwater rising along the fault brings about a piezometrical level into the coarse sediments, sometimes with a great discharge along high permeability layers.
