Landslides along Asian highway-1 from Dimapur to Moreh, India
Dr. Thokchom Devala Devi
National Highway-39 is a part of AH-1 that connects Asian countries through Moreh, i.e. hope line for Look East Policy. NH-39 is lifeline of both Nagaland and Manipur states. This highway experienced number of landslides every year in rainy season. It starts around Patkai Bridge, Chumukedima and at many places both small and large scale landslides occurred. Some major landslides occurred in this decade are Patkai-Kukidulong slide (July 2011, 2013), Phesama-Kigwema (12July, 2013) Zubza slide (2007, 2012), Phikomei slide (2004), Maram Slide (2010), Gopibung Mudslide (2004) and Moreh slide (2010). After 4-lane expansion from Dimapur-Kohima, whole rainy days people suffer while traveling along this highway. It took five to ten hours, even overnight to pass this section because of the landslides. By the combined effect of factors like large scale human activities; fragile lithology; rugged terrain; complex geological structures; seismicity and heavy rainfall, mud flow, debris flow cum slide, and rock fall have been taken place after every heavy rainfall in this area. To mitigate landslide incidences successfully in future it is suggested that the geological and geotechnical properties should be taken due importance by the planners in the initial stage and public awareness programme should be given.