GIS-Based Expert Knowledge for Landslide Susceptibility Mapping (LSM): Case of Mostaganem Coast District, West of Algeria

Landslides are one of the natural disasters that affect socioeconomic wellbeing. Accordingly, this work aimed to realize a landslide susceptibility map in coastal district Mostaganem (Western Algeria). For purpose, we applied knowledge-driven approach and Analytical Hierarchy Process (AHP) Geographical Information System (GIS) environment. We combined landslide-controlling parameters, such as lithology, slope, aspect, land use, curvature plan, rainfall, distance stream fault, using two GIS tools: Raster calculator Weighted Overlay Method (WOM). Locations with elevated were close urban nucleus national road (RN11); both sites, registered presence strong water streams. The quality modeled maps has been verified ground truth Area Under Curve (AUC) Receiver Operating Characteristic curve (ROC). study results confirmed excellent reliability produced maps. In regard, validation based on ROC indicates an accuracy 0.686 for approach. AHP WOM showed high (0.753).