Glacial Flooding & Disaster Risk Management Knowledge Exchange and Field Training July 11-24, 2013 in Huaraz, Peru HighMountains.org/workshop/peru-2013
Reducing Lake Water Level in Thorthormi Glacial Lake in Bhutan: An Adaptation Project to the Adverse Impact of Climate Change Karma Department of Geology and MinesBhutan Introduction Bhutan, a tiny little country located in the eastern part of the Himalayas surrounded by China in the north, India to the east, west and south (fig.1) has 677 glaciers and more than 2500 glacial lakes (ICIMOD 2001). Out of 2500 glacial lakes 24 of them has been classified as potentially dangerous lakes which has the potential of outburs. Later in 2006, Department of Geology and Mines (DGM) again in collaboration with ICIMOD has found an additional lake which has capacity to outburst in the future, thus taking the number of potentially dangerous lake to 25. Subsequent studies carried out by DGM in collaboration with the scientists from University of Vienna, Austria and Nagoya University, Japan thereafter in Lunana region in northern part of the country (fig.1) found out that the risk of GLOF from Thorthormi lake is ever increasing. Accordingly, during the formulation of first National Adaptation Plan of Action (NAPA) in Bhutan, a proposal to reduce the risk of GLOF from Thorthormi Tso was proposed. Considering the facts based on the results of intensive scientific investigations, the proposal received the highest priority and was approved for funding under the UNFCCC funding scheme. The project had three main components: reducing water level Thorthormi lake, installation of GLOF Early Warning System along the river Pho Chu and Public Awareness. The first component was implemented by Department of Geology and Mines, second by the Department of Hydromet Services and the third component by Department of Disaster Management respectively. As the main implementing agent for the first component, this paper is focussed primarily on reducing water level of Thorthormi Lake.