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What are glacial outbursts? Discuss the concerns caused by such phenomena with suitable examples.

Topic:  Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes.

1. What are glacial outbursts? Discuss the concerns caused by such phenomena with suitable examples. (250 words)

Reference: The Hindu 

Why the question:

The article talks about the Study of the Gya glacial lake outburst.

Key Demand of the question:

The question is based on the concept of glacial outburst and the concerns posed by them.

Directive:

Discuss – This is an all-encompassing directive – you have to debate on paper by going through the details of the issues concerned by examining each one of them. You have to give reasons for both for and against arguments.

Structure of the answer:

Introduction:

Start by explaining what glacial outbursts are.

Body:

A glacial lake outburst flood (GLOF) is a type of outburst flood that occurs when the dam containing a glacial lake fails. The dam can consist of glacier ice or a terminal moraine.

Failure can happen due to erosion, a buildup of water pressure, an avalanche of rock or heavy snow, an earthquake or massive displacement of water in a glacial lake when a large portion of an adjacent glacier collapses into it.

Discuss the concerns and threats posed by such a glacial outburst, present the case of Gya lake outburst.

Conclusion:

Conclude with solutions to address the problem such as early warning system, better land planning etc.