According to Shakil Ahmad Romshoo, another earth sciences professor at the University of Kashmir, the Indian Himalayas contain 12,000 glaciers and 2,000 glacial lakes, of which at least 200 are vulnerable to breaching. Glacial lake outburst flooding (GLOF) is the term scientists use to describe the event when the waters of these lakes breach their boundaries, creating flash floods.
“There is a potential threat of glacier lake outburst in Chenab valley of Jammu region and Zanskar area of Ladakh,” Romshoo says. This region has already experienced a sizable GLOF event in the recent past. In May 2015, a flash flood from a glacial lake in Zanskar damaged several bridges and buildings — and displaced more than 3,000 people. Kashmir, too, was hit by a similar flood in 2014 that killed around 300 people and damaged hundreds of houses.
Romshoo, who has done extensive research on glaciers in the Himalayas overthe last two decades, has been monitoring Kashmir’s biggest glacier, Kolahoi, which lies at an average elevation of 4,700 meters (15,400 feet). It is the main source of Lidder River whose waters become the tributaries of the Jhelum River in Kashmir.
According to a study in the journal Water, Kolahoi has lost 23 percent of its area since 1962 (from 13.73 square kilometers in 1962 to 10.49 square kilometers in 2018). “Kolahoi is receding at 20 meters every year,” says Romshoo, who also adds that the area is prone to earthquakes, which can lead to an increased risk of landslides and lake breaching.
Many residents of the Indian Himalayas fear that a combination of seismic activity and melting glaciers is putting too much stress on hydropower dams in the region. “We have several power projects in Chenab valley of Jammu region. The water dams could burst anytime due to frequent earthquakes, blasting, and fast moving of water by melting of glaciers,” says Muzafar Ahmed, a resident of the Kishtwar area of Jammu.
This concern hasn’t stopped the construction of new dams in the area. The Indian government has proposed the construction of eight new hydropower dams on the Chenab River and its tributaries. Construction work is underway on three of them.
Another Jammu University geologist, GM Bhat, suggests building small reservoirs for hydroelectricity generation. Any breach in these smaller water bodies would be much easier to control, he says. Unfortunately, small reservoirs do not address the increasing rate of melting glaciers. Tragic floods, like the region has been witnessing increasingly, “could arise anytime,” Bhat says.
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May 17, 2021 at 11:07PM
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Deadly Flash Floods on the Rise in the Himalayas - Earth Island Journal - Earth Island Journal
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