Replacing rice with other crops could help recover groundwater lost since 2000: Study
rice with other crops could help recover 60-100 cubic kilometres of groundwater lost since 2000 in north India, a study has found. Current cropping patterns — dominated by rice, which relies heavily on groundwater for irrigation — could result in a loss of about 13-43 cubic kilometres of groundwater if warming of the planet continues, a team of researchers, including those from the Indian Institute of Technology Gandhinagar, Gujarat, said.
The researchers proposed shifting from existing cropping habits by cutting down on cultivating rice as a potential solution for sustaining the fast-depleting resource in a warmer world that threatens food and water security.
«Replacing 37 per cent area of rice with other crops can recover 61 to 108 cubic kilometres groundwater compared to 13 to 43 cubic kilometres with current cropping pattern under the 1.5-3 degrees Celsius global warming levels,» the authors wrote in the study accepted for publication in the journal Proceedings of the National Academy of Sciences (PNAS) Nexus.
Compared to current cropping trends, the benefits of switching crops in saving groundwater are more during the prolonged dry periods predicted under global warming, the researchers said
According to the 2018 Intergovernmental Panel on Climate Change's (IPCC's) Special Report: Global Warming of 1.5 degrees Celsius, if current trends continue, global warming is likely to reach 1.5 degrees Celsius between 2030 and 2050 and could reach 3 degrees Celsius by 2100.
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