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Melting glaciers threaten China and India’s hydropower ambitions -Alok Gupta

-The Third Pole/ Scroll.in

The dams the two countries are relying on may not be able to generate much power if avalanches, landslides and floods continue worsening.

As glaciers shrink and monsoon rainfall becomes more unpredictable due to climate change, uncertainty around the viability of hydropower projects in the Hindu Kush Himalayas is increasing. A recent study on the state of a glacier on the southeastern Tibetan Plateau raises questions about the region’s long-term water supply and the risk of flooding from more meltwater run-off, with implications for the many dams planned in the Yarlung Tsangpo-Brahmaputra river basin.

The Hindu Kush Himalayan region is warming at almost double the global average rate: 0.32 degrees Celsius per decade versus 0.16 degrees Celsius. The study, published in September, found that in the past 20 years this warming has intensified at the Parlung No. 4 glacier, a medium-sized glacier that can be used as a benchmark to track changes in snow and rainfall patterns, and the subsequent shrinking of glaciers, in the area.

Temperatures at Parlung No. 4 have shot up by 0.39 degrees Celsius per decade since 1990. “It’s snowing less and raining more instead here,” says Achille Jouberton, one of the lead authors of the study, which was conducted by a team of European and Chinese researchers.

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