Landslide Hazard Zonation Along NH-39 From Kangpokpi To Mao, Manipur, India

Abstract

Due to the prevailing high rainfall and complex nature of terrain, hilly areas of Manipur are vulnerable to instability and mass wasting which have been aggravated by rapid pace of anthropogenic activities and high seismicity. To categorize the land surface into areas and arrange them according to degree of actual or potential hazard from landslide or other mass movements on slopes, an effort is made to prepare landslide hazard zonation map along NH-39 from Kangpokpi to Mao, covering an area of 650km2. Based on the hazardousness to landslide the study area has been divided into four different zones. The major part of the study area about 380km2 (58%) falls under the category of high risk zone, followed by moderate risk zone covering an area of 152km2, low risk zone (115 km2), and very high hazard zone (3 km2). Such zonation maps are useful for identifying and delineating unstable hazard prone areas so that suitable mitigative measures can be adopted to minimize the hazards. It also helps planners to choose the favorable sites for developmental schemes like road and building constructions.