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Title: Analysis of glacier lake outburst floods
Authors: Lohani, Amit Kumar
Jain, Sanjya Kumar
Issue Date: Jun-2016
Publisher: NISCAIR-CSIR, India
Abstract: The life cycle of glaciers in the Himalayas in India is affected due to climate change in the last few decades. Due to temperature rise, the rate of glacial melting has increased and this has increased water level in some of the glacial lakes. In Himlaya many thousand lakes are present and few of them are catergarised as vulnerable lakes. Sudden outburst of these glacial lakes causes heavy flood water and debris flows in the rivers. Lakes formed at the mouth of the glacier are formed behind the debris left by the glacier. These lakes are dangerous due to their large water-holding capacity. Due to outburst of these lakes a large amount of water flows downstream areas suddenly for a very small duration. Flash floods due to lake outburst is many times greater than the normal foods is known as glacial lake outburst flood (GLOF). Consideration of potential glacier lake outburst floods (GLOF) is essential for the design of river engineering structures located downstream of hazardous glacier lakes. Computation of design flood is must for the designing of hydropower schemes in the river valley. Due to impact of climate change it is now necessary to consider the impact of GLOF on design flood estimation. In National Institute of Hydrology, a number of GLOF studies have been carried out for the hydropower projects planned at India and Bhutan. In the present paper, methodology for simulation of glacier lake outburst floods has been discussed with a case study.
Page(s): 55-59
Appears in Collections:BVAAP Vol.24(1) [June 2016]

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