Abstract
Monitoring of landslides by computing the displacements gain importance in recent studies due to the accuracy in its measurements. Kerala-Karnataka landslides of August 2018, has led to severe loss of life and damages to both states. The study emphasizes the contribution of three major landslide-driving factors viz., rainfall intensity, land-use/land-cover and slope, towards the occurrence of land-subsidence, thereby to figure the crucial bounds of each causative factor that have induced landslides in the Idukki and Kodagu districts. The results identify and enunciate the vulnerable land-cover as the plantations and fallow/barren lands; the crucial rainfall intensity as 600 mm in Idukki and 1200 mm in Kodagu; and the critical slope angle as 20° to 35°, that are highly liable in triggering landslides. Identification of the crucial bounds in each causative factor of landslides aid in supporting the city planners and disaster management authorities to decide proper mitigation measures.
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