Landslide susceptibility along NH-39 between Karong and Mao, Senapati district, Manipur

National Highway-39 is the only lifeline of the state of Manipur. The sector between Karong and Mao is highly landslide prone and frequently blocked the NH-39. The area is represented by Disang and Barail Groups of rock. Considering the importance of NH-39, landslide susceptibility zonation studies along NH-39 between Karong and Mao were carried out following GSI guideline, a modified form of BIS (1998). Landslide susceptibility zonation map reveals that 57% of the facets belong to low susceptible zone. It is followed by moderate susceptible zone (33%), high susceptible zone (9%) and very low susceptible zone (1%). All the facets of high susceptible zone are concentrated along the road section of NH-39, especially Maram-Mao sector. The landslide susceptibility zonation map gives an overall picture of the stability condition of the hill slopes so it can be used as a base map for planning any developmental scheme or maintenance of the existing one.