DEM Based Categorisation of Landslides Induced by 2011 Sikkim Earthquake

Remote sensing techniques are widely used in disaster hazard detection and management. Cartosat Digital Elevation Model of landslides triggered by Sikkim 2011 earthquake was collected and the slope and elevation data was generated using ArcGIS software. This data was used to categorize the landslides and to look at the variation in the material that has caused slope failures such as rock, debris and soil. Similarly calculated distance of triggered landslides from epicenter has been mapped and the types of landslides triggered was observed. It has been noted that most landslides that have been triggered are more than 40km away from epicenter. Debris overburden slides are the most among the triggered landslides while rock falls were also observed, the rainfall during the event had also reactivated certain older slides.