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Home Disaster Management

Artificial Lake in Chamoli

February 23, 2021
in Disaster Management
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Artificial Lake in Chamoli
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In News: Recently, the glacial burst in the Chamoli district of Uttarakhand is an eye-opener to the ongoing disruption of the ecological balance.

Chamoli Lake

  • The lake was formed upstream of the Rishi Ganga river after the February 7 flash floods in Uttarakhand’s Chamoli district.
  • The lake which led concern of fresh deluge post-Uttarakhand flood recently is said to be 8 to 9 metres deep with around 50000 cubic metres of water in it.

What is Glacial Outburst?

  • When glaciers break off, the space underneath them develops into a glacial lake filled with water. 
  • The breaking off of the glacial lake is termed as Glacial Lake Outburst Flood (GLOF) or glacial outburst. 
  • The glacial outburst occurs when the water level of the lake rises or when the glacier retreats. 

Causes Glacier Outburst

  • Earthquakes, erosion, volcanic eruptions, build of water pressure or an avalanche of heavy snow can cause the glaciers to burst. 
  • The glacier outburst can also happen after the displacement of a massive water pocket in a glacial lake when an adjacent glacier retreats into it.

Cause Uttarakhand glacier burst

  • In case of Uttarakhand glacier burst tragedy, it is not yet clearly known what caused the outburst of Nanda Devi glacier. 
  • As per the experts, the breaking off of this huge chunk of Nanda Devi glacier into the Dhauli Ganga river is a rare incident as the Google Earth images and satellite did not show any glacial lake underneath the glacier that broke off.
  • In Uttarakhand glacier burst case, it is believed that the water pockets might have developed within the Nanda Devi glacier that led to this incident. 
  • Some experts also link this tragedy to climate change and global warming. 

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Source: Indian Express
Tags: News PaperPrelims

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