ABSTRACT
This chapter is concerned with different kinds of debris flows that have occurred in the pyroclastic deposits of the Campania region. According to other researchers, three main types of landslides have been detected: un-channelled, channelled and mixed debris flows. It discusses the results of the back-analyses of the propagation of debris flows in pyroclastic code with two different rheological models: the frictional model and the Voellmy model. Rapid long runout landslides represent a difficult challenge in hazard studies because they endanger areas situated far from the source. Predictions of the runout distance, flow velocity and depth are necessary for planning and designing protective measures and are a key requirement for delineating the hazard zone. 57 well-documented case histories which were suitable for back-analysis were selected.
