The slope forming material is comprised of thick in-situ soil of more than 5m depth. During heavy rainfall, oversaturation of the insitu soil leads to landslide due to vertical nautre of the standing slope.
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
Slope easing and construction of RCC retaining wall suggested as this is an important road corridor.
Aradonga slide
Hahim-Riangdo road
Construction of RCC retaining wall with sufficient weep holes, construction & maintenance of proper hillside drains along the road. Slope easing is also advised to arrest further failure from the crown.
Over-saturation of weak slope forming material comprising thick in-situ soil leading to lose of cohesion and failure. Vertical slope cut with no retaining wall.