Khangri Glacier expedition: Jt team assesses its condition and climate change response
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Itanagar: A comprehensive risk assessment of Rani Lake in Tawang district, identified by the
National Disaster Management Authority
(NDMA) as a category-B glacial lake with the potential to trigger
glacial lake outburst
, concluded on Saturday.
The assessment was undertaken by a joint team from the Centre for Earth Sciences and Himalayan Studies (CESHS), Itanagar, the National Centre for Polar and Ocean Research (NCPOR), Goa (under the Union ministry of earth science) and the Indian Institute of Technology, Guwahati.
The expedition to the Khangri Glacier, in the Gorichen mountain region, started from April 19 and concluded on Saturday, CESHS director (earth sciences) Tana Tage said.
Key activities included glacier mass balance measurements at 5,032 meters above sea level (msl) to assess the glacier's condition and its response to climate change, Tage said. The assessment involved a bathymetric survey to determine the lake's depth and volume, coupled with terrain observations, to evaluate the stability of moraines, drainage pathways and potential downstream hazards.
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To ensure continuous climate monitoring, the team also performed maintenance on an Automatic Weather Station (AWS) and successfully retrieved data collected over the winter, Tage said.
Furthermore, the team maintained water level sensors and conducted direct measurements of glacier meltwater discharge, enabling an accurate assessment of the total run-off from the glacier system.
In a first-of-its-kind initiative, the team also conducted a reconnaissance survey of a cluster of category-B glacial lakes, located at an altitude of 5,300 msl. These lakes, identified by the NDMA, were assessed for their risk potential to inform future hazard mitigation and disaster preparedness strategies.
To facilitate future expeditions, the team also identified a suitable site at Mirathang for establishing a long-term high-altitude field research station, Tage said.
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