Debris flow susceptibility mapping using the Rock Engineering System (RES) method: a case study

Abstract The main purpose of the present study is to develop a debris flow susceptibility map mountain area (Susa Valley, Western Italian Alps) by using an upgraded version Bonetto et al. ( Journal Mountain Science 18, 2021) approach based on Rock Engineering System (RES) method. In particular, under investigation was discretized in 5 × 5-m grid which GIS-based analyses were performed. Starting from available databases, several geological, geo-structural, morphological and hydrographical predisposing parameters identified codified into two interaction matrices (one for outcropping lithologies one Quaternary deposits), evaluate their mutual interactions weight estimation. result each point propensity index (DfPI), that estimates cell be potential source. obtained compared with those expedited universally recognized methods, i.e. Regional Qualitative Heuristic Susceptibility Mapping (RQHSM) Likelihood Ratio (LR). Each validated Prediction Rate Curve limitations strong points approaches analysed are discussed, focus innovativeness uniqueness RES. fact, site, RES method most efficient detection source areas. These results prove its robustness, cost-effectiveness speed application identification mapping sectors capable triggering flow.