Mapping of Landslide Risk Zones Using the Analytic Hierarchy Process (AHP) in the Vicinity of National Road RN16 between Bouchegouf and Souk-Ahras ( Algeria)
DOI:
https://doi.org/10.22399/ijcesen.4466Keywords:
Landslide susceptibility, AHP, GIS, RN16, Bouchegouf–Souk-Ahras, multi-criteria analysisAbstract
Landslides are among the most damaging natural hazards in northeastern Algeria, particularly along transport corridors traversing complex terrain. This study focuses on mapping the landslide susceptibility zones along the RN16 road section connecting Bouchegouf and Souk-Ahras using a multi-criteria decision-making approach based on the Analytic Hierarchy Process (AHP) integrated with Geographic Information Systems (GIS). Fourteen conditioning factors were selected, including topographic, hydrological, geological, and anthropogenic parameters. Thematic maps were generated for each factor, including a Digital Terrain Model (DTM), slope, aspect, elevation, plan curvature, profile curvature, Topographic Wetness Index (TWI), hydrographic network, distance to rivers, land use, land cover, road network, precipitation, lithology, and geology. The AHP was applied to compute the relative weights of these factors. The final susceptibility map was classified into five zones: very low, low, moderate, high, and very high susceptibility. Validation using known landslide occurrences demonstrated that all of the inventoried landslides fall within high and very high susceptibility classes. The results highlight the dominant influence of slope, lithology, precipitation, and land use in slope instability. The resulting map serves as a valuable tool for land-use planning, infrastructure protection, and disaster risk reduction along the RN16 corridor
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