New study on Indian sub-national virtual water trade of cereal crops: We found that 153 km3 of water travels between Indian states through the t...New study on Indian sub-national virtual water trade of cereal crops:
We found that 153 km3 of water travels between Indian states through the trade of cereals each year - just below the 175 km3 proposed by the National River Interlinking Project.
However, 41% of these cereals are produced in states with over-exploited groundwater, and a further 21% from states with critical/semi-critical reserves. 31 out of 35 states consequently partly consume cereals that have been produced with stressed groundwater.
Trade has a huge potential to balance water resources, but current patterns may be exacerbate groundwater shortages.
Find the full paper here (open access): https://iopscience.iop.org/article/10.1088/1748-9326/abc37a
Harris et al., 2020, Trading water: virtual water flows through interstate cereal trade in India. Environmental Research Letters.