NEW DELHI, Oct 22: In collaboration with the states, the Centre will reassess the vulnerability of all glacial lakes in the country through ground surveys and establish a monitoring system to disseminate information about potential glacial lake outburst floods (GLOFs), according to Government sources.
This decision follows the devastating floods caused by the Lhonak lake outburst in Sikkim due to heavy rains earlier this month. It resulted in at least 60 fatalities and extensive damage in Mangan, Gangtok, Pakyong, and Namchi districts. It also led to the destruction of the Chungthang dam, also known as Teesta III dam, a vital component of a major hydropower project in the state.
“A comprehensive assessment of the vulnerability of glacial lakes in the country is necessary. Our current understanding of these lakes is primarily based on remote sensing. We are now planning to conduct ground validations of all glacial lakes. Their vulnerability cannot be determined without this exercise,” said a source at the National Disaster Management Authority (NDMA).
Glacial lakes are formed by the melting of glaciers and the accumulation of meltwater in depressions on or near the glacier’s surface. GLOFs occur when these lakes suddenly burst open due to various factors, such as excessive water accumulation or triggers like earthquakes.
When a glacial lake bursts, it releases a massive volume of water, resulting in flash floods downstream. These floods can be extremely destructive and dangerous for both people and the environment in the affected area. (PTI)
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