Investigations of Unsaturated Slopes Subjected to Rainfall Infiltration Using Numerical Approaches—A Parametric Study and Comparative Review

In the past 30 years, research on rainfall-induced landslides has grown remarkably. The contribution of matric suction to soil strength and physics water flow in unsaturated soils are widely accepted phenomena among researchers. However, adoption mechanics geotechnical engineering practice been relatively slow, part due practicality design solutions available engineer. This paper conducts a parametric study silty slopes under vertical steady rate identify suitable slope hydrologic conditions incorporate for preliminary stability analysis. Notably, is most significant silt/clay with table located below mid-height slope. For height ?20 m fairly high table, primary controlling factor stability. Two case studies based distinct failure mechanisms presented review application common software rainfall seepage analyses slopes. Focus placed pre-failure stages each study. slip surface search method, mode, coupling approach integrated into computer program caused notable differences output results.