June 13, 2022
2 mins read

Third Pole faces worsening water imbalance

The Third Pole, which includes the Tibetan Plateau and the surrounding Hindu Kush Himalayan mountain ranges, is known as the “Asian water tower”…reports Asian Lite News

Rapid global warming has worsened the water imbalance for almost 2 billion people in the Third Pole region — including India, Bangladesh and Nepal — where about 90 per cent of water is used for irrigation, a new study has warned.

This will lead to greater water demand in densely populated downstream countries, according to a new paper published in the journal Nature Reviews Earth & Environment.

The Third Pole, which includes the Tibetan Plateau and the surrounding Hindu Kush Himalayan mountain ranges, is known as the “Asian water tower”.

With the largest global store of frozen water after the Antarctic and Arctic, the Third Pole region, located in the Qinghai-Tibet Plateau, is home to headwaters of over 10 major Asian rivers.

The “Asian Water Tower” region has gotten out of balance between solid water in glaciers and liquid water in lakes and rivers under the global climate change impact, reports Xinhua news agency.

The rise in temperatures with changes in the westerlies and the Indian monsoon led to glacier retreat and more precipitation in the region’s northern part and less in the southern.

The spatial imbalance will alleviate water scarcity in the Yellow and Yangtze River basins while increasing scarcity in the further-south Indus basins, the study said.

“Such imbalance will likely pose a great challenge to the supply-demand balancing of water resources in downstream regions,” said Yao Tandong, lead author of the study and an academician at the Chinese Academy of Sciences.

The highest water demand is projected to be in the Indus basin, said Walter Immerzeel, co-author of the study and a researcher at Utrecht University in the Netherlands.

He stressed that this demand would affect irrigation, accounting for more than 90 per cent of water use across the area.

“Since this north-south disparity is expected to be amplified by climate warming in the future, adaptation policies for sustainable water resource management are greatly needed in downstream countries,” said co-author Piao Shilong, also a researcher at Peking University.

The scientists said they still need more information to help the public respond to the changes, such as comprehensive monitoring stations in data-scarce areas.

They also call for collaboration between upstream and downstream countries.

Meanwhile, two recent studies have thrown more light on the condition of the glaciers across Himalayas and also those from the Trans-Himalayan region of Ladakh. Although the thinning, melting, and receding of glaciers have been known for quite some time now, every new study comes as an alarm for humanity.

In their latest published study, a bunch of researchers have studied the Pangong Tso region of Ladakh and ascertained the area changes and frontal retreat of 87 glaciers between 1990 and 2019 using satellite data. Besides, the glacier outlines were delineated manually and compared with existing regional and global glacier inventories that are available over the region.

ALSO READ-Urgent steps must be taken to save world’s third pole

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