Disaster report of Koslanda Landslide in Sri Lanka on October 29, 2014

Kenichi HANDA, Ryuichi HARA, Akira OHKAWARA and Toshiyuki SHIMANO

On October 29, 2014during a heavy rain event, a large landslide occurred in Kosland, Badulla District, Central Sri Lanka. The landslide and associated debris flow destroyed several local houses and killed more than 30 people. Following the landslide, an aerial reconnaissance by helicopter on November 5, 2014 and field observation between 19 th and 20th November, 2014 were undertaken by JICA Project Team to understand the occurrence mechanism of the landslide and identify further hazard of the landslide. This report summarizes the observation results conducted by JICA Project Team, presents the geological explanation of the mechanism and causes of the landslide, and gives suggestion on emergency mitigation measures for further movement of the landslide.