Rainfall Triggered Slope Instability Analysis with Changing Climate

Slope instability triggered by rainfall is common in tropical countries like India, where the soil of hill slopes are generally unsaturated condition, having higher strength than saturated condition due to matric suction. This study aims investigate change pore water pressure (PWP) with infiltration into slope and corresponding effect stability on different from regions India. By applying surface as a flux boundary transient seepage analysis performed using SEEP/W, results form PWP distribution within used input for SLOPE/W program Geostudio 2018 R2, check slope. involves use CMIP5 (Coupled model intercomparision project phase 5) simulations data duration 2015–2050, 2051–2075 2076–2100; which completely based non-stationary approach (i.e., statistics extremes changes time) rather conventional methods extracting that stationary approach. The checked 95 percentile intensity well maximum period 2015–2100, 5 days considered be 24 h. It concluded climate change, may marginally stable under historical present events can fail projected precipitation estimates, this understood Haflong 30° slope, 2015–2050 factor safety (FOS) value 1.0013, will 2076–2100 FOS 0.9935 0.9989, respectively. A continuous decrease increasing observed all areas consideration.