A GIS framework for prediction of basin‐wide post‐failure geometry of confined subaqueous landslides

Stability analysis of submarine and sub-lacustrine slopes requires special attention to the strain-softening nature clay-rich sediments. Utilizing often-used infinite slope assumption using peak strength is inadequate for task at hand as well-known limit equilibrium method may provide non-conservative estimate marine slopes’ stability. In this paper, a GIS based framework developed account more suitable shear band propagation slope-failure criterion basin-wide stability calculations. After determining slab failure prone areas, employs analytical retrogressive above depth-integrated finite element calculating size confined slides toe. This allows predicting landslide's post-failure configuration overall landslide coverage zone. The first benchmarked prove its competence then applied well documented Zinnen Slide southeastern banks Küssnacht Basin, Lake Lucerne, Switzerland. results application show good agreement with observed basin geomorphology.