Basin Sediments Geometry and Strength as Controls for Post?Failure Emplacement Style of Alpine Sub?Lacustrine Landslides

Predicting the evolution of underwater mass movements in their post-failure stage is vital for risk assessment offshore structures and ensuring safety coastal communities threatened by tsunami waves. In absence sedimentological geotechnical data, variability behavior a specific marine or lacustrine setting often attributed to predisposition factors such as slope height-drop depth basal shear surface. this paper, contribution other geometrical parameters inclination relative thickness frontal basin sediments investigated using coupled Eulerian-Lagrangian finite element framework. An emphasis given important role strength difference between sediments. The suggested framework first validated against well-documented Zinnen slide Lake Lucerne (Switzerland), successfully reproducing geometry capturing main features observed published seismic profiles. It then applied parametric study illustrate decisive determining wasting similar settings.