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LATEST NEWS UPDATES | Repeated multi-year droughts hit India over last 1,000 years, water policies need reassessment: Study -Rohini Krishnamurthy

Repeated multi-year droughts hit India over last 1,000 years, water policies need reassessment: Study -Rohini Krishnamurthy

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published Published on Sep 26, 2022   modified Modified on Sep 27, 2022

-Down to Earth

Southwest monsoon could switch into a drought-prone mode, lasting decades in the future

India witnessed repeated multi-year droughts over the last thousand years, predominately before 1871, a new study has predicted.

This contrasts with the drought history of the post-1871 era. The country saw only one instance of a three-year-long drought during this period, from 1985-1987, the study published September 19, 2022, in the journal Proceedings of the National Academy of Science highlighted.

Subcontinent-wide severe droughts, too, have become rare, with only five such instances over the last 150 years.

The southwest monsoon could switch into a drought-prone mode, lasting decades in the future, the authors of the study warned.

India’s current water resources, sustainability and mitigation policies do not consider the possibility of multi-year droughts in the future. The researchers make a case for reassessing policies.

Gayatri Kathayat and her colleagues arrived at these findings by reconstructing monsoon records.

“We have 150 years of instrumental data. But we did not know what monsoons looked like in the past. Everything was like a black hole,” Kathayat, an author of the study, told Down To Earth.

This quest took them to Mawmluh cave, Cherrapunji, one of the wettest regions in the world.

The researchers studied geological formations called stalagmites, mineral deposits formed by flowing, dripping, or seeping water to make the reconstruction possible.

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Down to Earth, 26 September, 2022, https://www.downtoearth.org.in/news/climate-change/repeated-multi-year-droughts-hit-india-over-last-1-000-years-water-policies-need-reassessment-study-85132


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