Rapid prediction for rainfall-induced landslides in wide area using surrogate model of slope stability analysis

Abstract

This study presents a framework for rapid landslide prediction over a wide area using pre-computed results of infiltration analysis, surface flow analysis, and three-dimensional limit equilibrium-based slope stability analysis. After a series of numerical simulation are performed for different rainfall scenarios, a surrogate model is constructed with the help of the proper orthogonal decomposition and the Kriging method. The proposed framework is applied to a landslide risk analysis in consideration of actual terrain data. Obtained results show that the proposed framework has a high potential for rapid landslide risk analysis over a wide area.