ABSTRACT
Rainfall-induced slope instability is a significant concern in mountainous regions like Madikeri, which is present in the Western Ghats of India. This paper uses Transient Rainfall Infiltration and Grid-based Regional Slope-stability (TRIGRS) model to investigate the effect of varying rainfall intensity on the factor of safety of slopes. For the present study two landslide locations that experienced debris flows due to a high rainfall intensity during 13-17 August 2018 near the Monnageri village in Madikeri taluk of Karnataka are considered. The simulation results have shown that increasing rainfall intensity has reduced the factor of safety in the study regions showing the impact of the rainfall intensity and its relationship with the slope stability indicating that lower factor of safety may cause landslides depending on the other triggering parameters and soil behavior at the study site.
