Landslide Propagation Modelling for Hazard Assessment

Using funds from the Austrian Programme for Rural Development, hazard maps for landslides in the municipality of Feldbach (Styria, Austria) were compiled. The main objective was to develop a hazard information system for landslides providing hazard maps for spatial planning purposes. Due to geological as well as meteorological conditions, landslides are among the dominant geomorphological processes in almost the entire southeast of Styria. The area is characterized by loose neogenic sediments with alternating layers of sands, silts, clays, marls and gravels as well as a high intensity of local precipitation events. While the majority of landslides have rather low velocities, in the area of steep slopes there is also the probability of shallow mudslide-like, rapid movements (hillslope debris flows)