Groundwater Depletion

Electricity subsidies reduce the cost of operating electric irrigation pumps. When electricity is free or charged at a flat rate unrelated to consumption, the marginal energy cost of additional pumping becomes very low, weakening incentives to conserve groundwater. Energy support can therefore function as an implicit groundwater subsidy in irrigated agriculture.

How the subsidy affects extraction

• A flat tariff, commonly linked to pump capacity rather than electricity consumed, allows additional pumping without a corresponding increase in the electricity bill.
• Low pumping costs make tubewell irrigation and groundwater-intensive cropping more economically attractive where aquifers and electricity supply permit.
• Absent or weak metering prevents prices from signalling the scarcity of either electricity or groundwater.
• The effect varies with rainfall, recharge, geology, power-supply hours, surface irrigation and crop prices; electricity subsidy is therefore an important driver, not the sole cause.

Consequences for water and farmers

• When withdrawal persistently exceeds aquifer recharge, groundwater levels decline and wells may become seasonal or fail.
• A falling water table increases the pumping lift, energy requirement and cost of accessing each unit of water.
• Large farmers are generally better placed to deepen wells or install stronger pumps, while small farmers and water buyers face greater vulnerability.
• Subsidised power can reinforce water-intensive crop choices already encouraged by procurement, price and market incentives.

Principles for better policy design

Reform should preserve legitimate farm support while separating it from unlimited electricity consumption.

• Metered, reliable supply combined with capped subsidy or direct income support can protect farm incomes while restoring an incentive to save water.
• Feeder separation and energy accounting can improve the measurement and management of agricultural electricity supply.
• Solar irrigation requires safeguards such as incentives to sell surplus electricity, because zero-cost solar power can otherwise encourage additional pumping.
• Crop diversification, efficient irrigation, aquifer-based regulation and recharge measures must complement electricity reform.

How UPSC asks this