Automatic procedure for landslide hazard mapping through GRASS

The present work proposes a new automatic procedure that, taking into account only easily available data (Landslide Inventory map, DTM, land use map and geological map), allows the creation of landslide hazard maps over large areas using multivariate statistical analysis. The procedure is devoted to slides and flows. The factors of instability are slope, lithotype and land use, attributes of proven importance in the genesis process of landslides and often available on extensive areas. The features of the study region are implicitly taken into account using, as test areas of the statistical model, areas pertinent to the region itself and previously subjected to landslides. Alternatively, the procedure can be calibrated in regions which are similar to the analysed one from the morphological, lithological and vegetation cover point of view, and in which landslides occurred. The procedure is implemented in the GRASS GIS software by a shell script.