Beause of the weak slope forming material comprised of thick in-situ soil, a retaining wall must be constructed
Tep, Y. and Baitha, A., 2020. Macro-scale (1:50,000) landslide susceptibility mapping in parts of Toposheets nos. 78N/8, 78O/1 and 78O/5, Kamrup and Goalpara districts of Assam, West Khasi Hills, Ri-Bhoi and East Garo Hills districts of MGhalaya. Unpubli
Because of the thick in-situ soil forming the slope, failure occurs during heavy rainfall because there was no retaining wall to support the vertical slope surface
Malangkona-Nongporuo slide-3
Malangkona-Nongporuo road
Toe support for the affected slope through construction of strong RCC retaining wall with sufficient weep holes, Construction of road side drain.
Reduction of cohesive strength of the slope forming material on over-saturation due to heavy rainfall. Loosening of toe support due to erosion by road side nala and vertical slope cut.