Uttarakhand's First Glacial Lake Early-Warning System in Vasundhara Tal, Chamoli, Pg8

Key Highlights:

• Uttarakhand has installed its first glacial lake early-warning system at Vasundhara Tal in Chamoli district.
• The system aims to reduce the risk posed by Glacial Lake Outburst Floods (GLOFs).
• A joint scientific and technical team from the Central Building Research Institute (CBRI), Roorkee, and the Wadia Institute of Himalayan Geology, Dehradun, is deploying the system.
• Support for the operation is being provided by the State Disaster Response Force (SDRF), National Disaster Response Force (NDRF), and the Indo-Tibetan Border Police (ITBP).
• Vasundhara Tal is one of 15 high-risk glacial lakes identified by the National Disaster Management Authority (NDMA) in Uttarakhand, categorized as Category A.

Detailed Insights:

• The initiative follows recent disasters, including a massive flood in Nepal in August 2025 and the Dhauli flash flood in Uttarkashi a year prior.
• The early-warning system at Vasundhara Tal will continuously monitor water level, weather conditions, snow conditions, water flow, and ground movement around the lake.
• Key equipment includes water-level sensors, automatic weather stations, subsurface temperature sensors, and tilt and accelerometer sensors, all powered by solar energy.
• The Uttarakhand State Disaster Management Authority (USDMA) began planning to study and monitor the state's glacial lakes in January 2025.
• In 2023, the National Remote Sensing Centre identified 344 glacial lakes in Uttarakhand, with 13 designated as high-risk.
• Bathymetric surveys have already been completed at six lakes, including Vasundhara Tal, to determine their depth and water-holding capacity.
• Communication from the high-altitude site to USDMA will be maintained using satellite phones and low-Earth-orbit communication devices.

Key Concepts Involved:

• Glacial Lake Outburst Flood (GLOF): A sudden and rapid release of a large volume of water from a glacial lake, often caused by the failure of natural dams.
• Early-Warning System: A system designed to detect environmental hazards and provide timely alerts to enable preparedness and response actions.
• Bathymetric Survey: The measurement of the depth of water bodies and the mapping of the underwater terrain to understand their physical characteristics.