A large area is undergoing slow, downward movement of slope forming material. The movement is caused by shear stress produced by thick overburden on a 20o-25o slope angle, which when gets super saturated during heavy rainfall leads to loss of cohesion an
Chasie M. &  Theophilus P.K., 2017: Updation of existing landslide inventory of North Eastern region based on the new incidences as and when occurs during the period, Unpubl. GSI progress report for FS 2016-38
Crown cracks were developed two years ago. Since the area is very unstable it is advisable not to construct heavy structures in the area. Based on the preliminary assessment, detailed site specific study is suggested to ascertain the geo-scientific cause
Khongsai slide-1
Khongsai village, Haflong
1. Contour drain to stop the surface run-off from the affected area.
2. Sealing of the cracks by impervious material.
The clayey-silt rich thick overburden material resting on moderate slope angle got saturated and heavy during heavy rainfall. Further, toe erosion by a mountain stream flowing at the foot of slope has destabilized the slope. Subsequently, the saturated s