The shallow planar debris slide occurred due to blocking of natural nala for road construction. It increased the pore pressure in the unconsolidated weathered SFM (siltstone intercalated with splintery shale of Disang Group) especially during rainfall.
Ramesh Guguloth, Neethu Alpho Joseph, 2022, Remote Sensing based Macro-scale (1:50,000) landslide susceptibility mapping in Toposheets 83M/4, 8,12,15,16; 83N/01, 2, 5, 6, 9,13; 92A/03, 4, 6, 7, 11,14,15,16; 92E/02, 3 & 4 covering  parts of Tirap, Changan
NIL
1.5 km NE of Lamsa
Khonsa-Changlang road, NH-215
1. Removal of slided debris material 2. Diversion of nala with the construction of culvert. 3. Construction of gabion wall along the affected road section.
1.Blocking of natural nala for road construction. 2. Pore water pressure developed in the slope forming material due to oversaturation during heavy rainfall thereby reduces its shear strength.