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Satellite Based Real Time Monitoring Of Himalayan Terrain May Help Avoid Disasters

The glaciers in the Himalayas are melting at a faster rate creating new lakes and expanding the existing ones

To avoid the Chamoli mishap from recurring, the Ministry of Science and technology with IIT Kanpur has conducted a study on how the satellite-based real-time monitoring of the Himalayan glacial catchments would improve understanding of flood risk in the region and help inform an early flood warning system that could help curb disaster and save human lives.

“The integration of monitoring devices with satellite networks will not only provide telemetry support in remote locations that lack complete cellular connectivity but will also provide greater connectivity in coverage in the cellular dead zones in extreme topographies such as valleys, cliffs, and steep slopes,” the authors explained.”This should be the future strategy to reduce loss of human lives during glacial lake outburst floods (GLOF),” said a study carried out by scientists from IIT Kanpur.

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The study was carried out by Dr. Tanuj Shukla and Prof. Indra Sekhar Sen, Associate Professor from IIT Kanpur, with support from the Department of Science & Technology, Government of India, has been published in the international journal ‘Science’.The IIT Kanpur team suggests that efforts to help mitigate GLOF events in the future should include the creation of a network of satellite-based monitoring stations that could provide in situ and real-time data on GLOF risk.

Himalayan
This should be the future strategy to reduce the loss of human lives during glacial lake outburst floods (GLOF). Pixabay

Temperature and the numbers of extreme rainfall events are rising at an increased rate because of climate change. Suitably called Earth’s “Third Pole”, the Himalayan region is home to the largest ice mass outside of the planet’s Polar Regions. The glaciers in the Himalayas are melting at a faster rate creating new lakes and expanding the existing ones. Besides, the rising temperatures and extreme precipitation events make the region increasingly prone to a variety of natural hazards, including devastating glacial lake outburst floods (GLOFs).

GLOFs occur when either a natural dam containing a glacial lake bursts or when the lake’s level suddenly increases and overflows its banks, leading to catastrophic downstream destruction. For example, in 2013, an avalanche caused the glacial moraine holding back Chorabari Lake in northern India to give way, releasing a sudden torrent of water, boulders, and debris that scoured the river valley below, resulting in the deaths of more than 5,000 people. With climate change, these events are likely to increase in frequency and magnitude throughout the Himalayas.

ALSO READ: ‘Komic,’ A Bollywood film, Portrays The Warming Of The Himalayas

However, the remote, challenging Himalayan terrain and the overall lack of cellular connectivity throughout the region have made the development of early flood warning systems virtually impossible.”In their recent work, the Scientists also point out that the surge of meltwater in mountain streams is most commonly caused by cloud-burst events during the monsoon season (June-July-August) time frame.”

However, the recent (February 7, 2021) sudden surge of meltwater in the river tributary of the Ganga, Dhauli Ganga, during the dry season suggests that this time frame needs to be expanded. The catastrophe in the upper Dhauli Ganga basin is linked to processes other than precipitation events, such as snow avalanches, rock landslides, or other unidentified drivers, and therefore determining all of the potential major and minor drivers behind sudden surges of meltwater into headwater streams is vital for understanding the hazard profile of the region. (IANS/JC)

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