ABSTRACT
This chapter presents a sensitivity analysis to a statistically-based landslide susceptibility model, performed for shallow translational slides occurred in a test site located north of Lisbon. Assessment of landslide susceptibility is always based on the assumption that future mass movements are more probable to occur in areas with conditions similar to those that originate slope instability in the past. The quality of the landslide inventory and of the landslide predisposing factors database are of crucial importance for the quality of prediction results, independently on the statistical tools used for the modelling procedure. The sensitivity evaluation of landslide susceptibility models to the type and number of landslide predisposing factors was performed in a test site of 20 km2 located northward of Lisbon. The landslide susceptibility model was applied, in a first step, to each landslide predisposing factor considered individually, and seven prediction rate curves were constructed.
