The debris slide has triggered due to toe erosion and weak SFM predominantly comprises of thick younger alluvium sediments. The rainwater increases of pore water pressure in the thick overburden soil reduced the shear strength.
Anicia K.S., Arvind Kumar Singh, 2022, Remote Sensing based Macro-scale (1:50,000) landslide susceptibility mapping in TS no. 82 P/12, 15, 16; 91 C/3, 4, 7, 8, 12; 91 D/1, 2, 3, 4, 5, 6, 8, 9 and 10 covering parts of Lower Dibang Valley, Lohit, Anjaw and
NIL
500 m south from landslide no. 44
Newly connstructing Roing-Hunli/ Anini road NH-313
No remedial measures are suggested as the slide occurred in the vicinity of the river.
The SFM is highly unconsolidated younger alluvium sediments. During rainfall the unconsolidated slope forming material get oversaturated resulting in development of hydrostatic pressure and thus reduced the shear strength of the material.