Gogoi, D, Kavitha, S, Kumar, P. S (2016). Macro-scale landslide susceptibility mapping in parts of 78B/1, 5, 9, 13 and 78A/16, Darjeeling and Jalpaiguri districts, West Bengal
Earthen, unlined drainage is too small to carry run-off water which percolates below road
NH31A_ Hatisur (1.8 km)
NH31A
Proper concrete retaining wall and side drainage to divert water from slide zone.
Oversaturation of the debris material