Debris flow danger evaluation in the Eastern Alps by integration of numerical simulation and GIS techniques

A methodology for evaluating debris flow danger is proposed. The methodology consist of three steps: (i) field and desk analyses, (ii) numerical simulations of flows based on single-phase model with different rehologies and, (iii) GIS-based danger mapping. In desk and field analyses all the data input for the numerical simulations have been collected. Successively, in the simulations the use of different rehologies allowed account for temporal and spatial variations of debris flow behavior. Finally, outputs of the modelling have been combined by GIS techniques in order to assess debris flow danger. In the next future, research will investigate new combinations of the outputs of numerical simulations for assessing debris flow hazard and the use of codes based on two-phase models will be tested