Solving groundwater depletion in India while achieving food security.

Area of Science:

• Agricultural Science
• Hydrology
• Environmental Sustainability

Background:

• Groundwater depletion in India is a major sustainability challenge, particularly in grain procurement regions.
• Irrigation, often groundwater-based and subsidized by electricity, is critical for food security.
• The Indian Government's Procurement & Distribution System is a key area for potential solutions.

Purpose of the Study:

• To analyze the impact of shifting crop procurement and growing regions on India's food security and groundwater levels.
• To evaluate the economic implications for farmers and government subsidies.
• To identify sustainable agricultural practices for national food procurement.

Main Methods:

• Utilized over a century of daily climate data.
• Incorporated spatially detailed economic and crop yield parameters.
• Employed an optimization model to simulate shifts in procurement and cultivation geographies.

Main Results:

• Procurement targets can be met by shifting crop geographies, even without irrigation.
• Net farm income can be increased through these spatial shifts.
• Irrigation, while increasing net farm income by 30%, exacerbates groundwater depletion.

Conclusions:

• Re-locating crop procurement and cultivation offers a viable strategy to achieve food security while arresting groundwater depletion.
• Reduced electricity subsidies in depleted areas can fund necessary spatial redistribution of farm income.
• Policy changes in the procurement system are crucial for sustainable agricultural water management.