Which of the following statement/statements are correct about a disaster which struck Uttarakhand’s Chamoli district in February 2021?
1. A portion of the Gangotri glacier broke off and caused havoc.
2. There was sudden flood in the middle of the day in the Dhauliganga, Rishi Ganga and Alaknanda rivers.
3. Tapovan-Vishnugad Hydel Project and the Rishi Ganga Hydel Project were extensively damaged.
Select the correct answer using the code below:
Options
AOnly 1
BOnly 1 and 2
COnly 2 and 3
D1, 2 and 3
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Correct Answer
COnly 2 and 3
Model Answer
A glacial break in the Tapovan-Reni area of the Chamoli District of Uttarakhand led to a massive Flash Flood in Dhauli Ganga and Alaknanda Rivers.
It occurred in river Rishi Ganga due to the falling of a portion of the Nanda Devi glacier in the river which exponentially increased the volume of water. Hence statement 1 is incorrect.
Rishiganga meets Dhauli Ganga near Raini. So Dhauli Ganga also got flooded. Hence statement 2 is correct.
Major Power Projects Affected:
Rishi Ganga Power Project
Tapovan Vishnugad Hydropower Project on the Dhauliganga
Hence statement 3 is correct.
Additional Information
Flash Floods are sudden surges in water levels generally during or following an intense spell of rain.
These are highly localized events of short duration with a very high peak and usually have less than six hours between the occurrence of the rainfall and peak flood.
A map titled Trail of Destruction marking the Chamoli glacier burst, the flooded Dhauli Ganga and Alaknanda rivers and the places downstream.
