Introduction: Groundwater Crisis and Agriculture

• India's Agricultural Dependence on Groundwater: India is a leading producer of water-intensive crops like rice, wheat, and pulses. The country’s agricultural sector heavily depends on groundwater for irrigation, especially for paddy cultivation.
• Over-exploitation of Groundwater: Groundwater extraction for irrigation is increasingly unsustainable, threatening agricultural sustainability in the long term.

Rising Groundwater Usage and Its Implications

• Population Growth and Groundwater Use: Between 2016 and 2024, global population grew from 7.56 billion to 8.2 billion, and India’s population rose from 1.29 billion to 1.45 billion. Concurrently, groundwater used for irrigation increased from 38% in 2016-17 to 52% in 2023-24, exacerbating the water crisis.
• Over-extraction in Major Paddy-Producing States: States like Rajasthan, Punjab, and Haryana have witnessed severe over-exploitation of groundwater for irrigation.
  • Rajasthan: Highest groundwater salinisation (22%) despite receiving the highest average rainfall (608 mm) among these states.
  • Punjab and Haryana: Lesser groundwater salinity due to canal irrigation and micro-irrigation systems.

Impact of Excessive Fertilizer Use on Groundwater Quality

• Soil Salinity and Groundwater Contamination: Excessive use of fertilizers, particularly for paddy cultivation, increases soil salinity and contributes to groundwater contamination.
• Toxic Chemicals in Groundwater: Nitrate contamination, caused by nitrogen-based fertilizers, and uranium contamination due to phosphate fertilizers are key concerns in states like Maharashtra, Telangana, Andhra Pradesh, and Tamil Nadu.
• Health Risks: Contaminated groundwater poses health risks such as thyroid disorders, cancer, and dental fluorosis, along with reduced agricultural productivity.

Projected Impact on Future Groundwater Availability

• Unsustainable Groundwater Levels: The Central Groundwater Board (CGWB) reports that if current practices continue, over half of the districts in Punjab could face groundwater depletion. Similarly, 21-23% of districts in Haryana and Rajasthan may experience a similar crisis.
• Population Growth and Water Scarcity: With India’s population expected to reach 1.52 billion by 2036, the need for sustainable groundwater management becomes even more critical.

Government Initiatives for Groundwater Management

• National Mission for Sustainable Agriculture (2014): Promotes sustainable practices like zero tillage, cover cropping, and micro-irrigation for efficient water and chemical use.
• Pradhan Mantri Krishi Sinchai Yojana (2015): Aims to boost irrigation efficiency through drip and sprinkler irrigation methods.
• Atal Bhujal Yojana (2019): Targets efficient groundwater management in water-stressed states like Gujarat, Haryana, Rajasthan, Maharashtra, and Uttar Pradesh.
• Success of Government Initiatives: CGWB data shows that the percentage of districts with unsustainable groundwater levels dropped from 23% in 2016-17 to 19% in 2023-24.

Role of State Governments in Groundwater Management

• State-Level Initiatives: States with unsustainable groundwater levels must take proactive measures to manage water resources efficiently.
  • Example - Odisha: Odisha's Integrated Irrigation Project for Climate Resilient Agriculture emphasizes irrigation efficiency and climate-smart practices, supported by World Bank funding.
• Encouraging Resource-Efficient Agriculture: States with safe groundwater levels, like Chhattisgarh, Bihar, Jharkhand, Telangana, and Odisha, should adopt water-efficient practices to protect groundwater resources.

Conclusion: Ensuring Agricultural Sustainability and Water Security

• Need for Urgent Action: Scaling up efforts to improve irrigation practices and groundwater management is crucial to securing India’s agricultural future.
• Global Food Security: Protecting groundwater resources will not only ensure water security within India but also contribute to global food security amid climate challenges.
• Blueprint for Sustainable Agriculture: States like Odisha are providing a model for sustainable water management, which can be replicated across water-stressed regions in India.