Millions of people residing in the lower reaches of the Ganga basin in India may face food shortage in the next three decades if the much revered river continues to lose water due to factors that include unsustainable groundwater extraction, a study has claimed.
Researchers associated with the study added that low river flows could also have implications for achieving the United Nations' Sustainable Development Goals (SDGs).
But experts, not associated with the study, also pointed to the combined blow of surface and groundwater misuse that has beleaguered the Ganga river basin, sheltering around 10 per cent of the global population. Agricultural inefficiency is a chink in the chain, they say, when it comes to sustainable water use.
The modeling study forecasts that in the absence of interventions, groundwater contribution to the river's water flow would continue diminishing in the summer for the next 30 years.
The analysis was conducted by Abhijit Mukherjee at the Indian Institute of Technology-Kharagpur, Soumendra Nath Bhanja (formerly at IIT Kharagpur) and Yoshihide Wada from Austria's IIASA (International Institute for Applied...