Groundwater depletion will reduce cropping intensity in India

Meha Jain, Ram Fishman, Pinki Mondal, Gillian L. Galford, Nishan Bhattarai, Shahid Naeem, Upmanu Lall, Balwinder-Singh, Ruth S. DeFries

Research output: Contribution to journalArticlepeer-review

Abstract

Groundwater depletion is becoming a global threat to food security, yet the ultimate impacts of depletion on agricultural production and the efficacy of available adaptation strategies remain poorly quantified. We use high-resolution satellite and census data from India, the world's largest consumer of groundwater, to quantify the impacts of groundwater depletion on cropping intensity, a crucial driver of agricultural production. Our results suggest that, given current depletion trends, cropping intensity may decrease by 20% nationwide and by 68% in groundwater-depleted regions. Even if surface irrigation delivery is increased as a supply-side adaptation strategy, which is being widely promoted by the Indian government, cropping intensity will decrease, become more vulnerable to interannual rainfall variability, and become more spatially uneven. We find that groundwater and canal irrigation are not substitutable and that additional adaptation strategies will be necessary to maintain current levels of production in the face of groundwater depletion.

Original languageEnglish
Article numbereabd2849
JournalScience advances
Volume7
Issue number9
DOIs
StatePublished - 24 Feb 2021

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