Uttarakhand flood was caused by rare rock and glacier avalanche

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The Tapovan Vishnugad hydroelectric plant was damaged by a debris flow

Irfan Rashid, Department of Geoinformatics, University of Kashmir

The 2021 flood in Uttarakhand, India, that resulted in over 200 dead and missing was the result of an avalanche that dropped about 27 million square metres of rock and glacier ice from the nearby Ronti mountain.

On 7 February 2021, residents of the Chamoli district in Uttarakhand saw a plume of dust coming down through the valley followed swiftly by a massive amount of water that damaged two hydropower projects. They extensively filmed the events of that day, broadcasting it in real time.

“It’s not that this is the first time that a flood happened, but it is the first time that a flood happened in February. It snows in the region in winter and…

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