Water Resources

Why this chapter matters for UPSC: Water security is one of India's most critical policy challenges. UPSC asks about river interlinking, dam-related displacement (Narmada case), groundwater depletion, traditional water harvesting, and interstate water disputes. This chapter provides foundational concepts and case studies. The inter-state water disputes (Cauvery, Mahanadi, Krishna) are a perennial GS2/GS3 topic that connects to this chapter's river project material.

Contemporary hook: India ranked 131st out of 185 countries on the UN Water Development Index 2023. Seventeen major Indian cities including Delhi, Bengaluru, Chennai, and Hyderabad are projected to face acute water shortages by 2030 (NITI Aayog, Composite Water Management Index). The 2024 Delhi water crisis and the ongoing Cauvery water dispute between Karnataka and Tamil Nadu demonstrate that water is becoming a resource conflict driver — in both urban and rural India.

PART 1 — Quick Reference Tables

India's Water Resources: Key Data

Major Multi-Purpose River Valley Projects

Traditional Water Harvesting Systems by Region

PART 2 — Detailed Notes

India's Freshwater Crisis

Water is distributed very unequally across India:

• The monsoon paradox: 80% of India's rainfall occurs in 4 months (June–September); most runs off; only ~28% is captured
• Regional imbalance: Cherrapunjee (highest rainfall on Earth: ~11,000 mm/year) faces drinking water scarcity in dry months; Rajasthan (<100 mm) has evolved sophisticated traditional conservation
• Aquifer depletion: Punjab, Haryana, western UP are "mining" groundwater at unsustainable rates; GRACE satellite data shows significant depletion

The Role of Multi-Purpose River Projects

Jawaharlal Nehru called large dams "the temples of modern India" — symbols of India's technological progress and capacity to harness nature for national development.

Benefits of multi-purpose projects:

1. Irrigation: Regulated water supply for agriculture in dry seasons/regions
2. Hydroelectric power: Clean energy; Bhakra Nangal provided power for Punjab's Green Revolution
3. Flood control: Reservoirs store floodwaters; reduce downstream flooding
4. Drinking water: Urban and rural water supply
5. Navigation: Some projects improve river navigability
6. Tourism/recreation: Reservoirs attract tourism

Narmada Bachao Andolan (NBA)

The Narmada Bachao Andolan (Save the Narmada Movement) is India's most significant environmental-social movement against dam-based development:

• Sardar Sarovar Dam (Gujarat) and the Narmada Valley Development Project (planned 30 large, 135 medium, 3,000 small dams on Narmada and its tributaries)
• Led by: Medha Patkar (from 1988); later joined by Baba Amte
• Core argument: Displacement of 200,000+ people (mostly tribal, poor) is too high a price; alternatives (watershed management, smaller projects) not adequately explored; resettlement incomplete
• Supporters included Arundhati Roy, intellectuals, international NGOs

The NBA raised fundamental questions:

• Who benefits from development? (Gujarat farms and industries vs. Madhya Pradesh tribals)
• Whose rights matter? (state authority to develop vs. communities' right to land and livelihood)
• What counts as "development"? (GDP growth vs. human welfare vs. ecological integrity)

Outcomes: Supreme Court allowed dam height increase (2000, 2017) despite NBA protests; resettlement remains incomplete; the case is India's paradigmatic example of development-displacement conflict.

Rainwater Harvesting

The revival of traditional rainwater harvesting is seen as a decentralised, community-based alternative to mega-dams:

• Rooftop rainwater harvesting: Mandatory in several states (Tamil Nadu made it compulsory for all buildings in 2003); water collected from roofs stored in tanks or used for groundwater recharge
• Watershed development: Small check dams, bunds, and contour trenches in catchment areas slow runoff, recharge groundwater
• Johad revival: Tarun Bharat Sangh (Rajendra Singh) revived thousands of johads in Alwar district, Rajasthan — resulted in five rivers flowing again that had been dry for decades

PART 3 — Frameworks & Analysis

Water Conflict Types in India

The Hydrology-Agriculture-Policy Nexus

India's water crisis is inseparable from its agricultural water use:

• Agriculture accounts for ~80% of India's freshwater use
• Paddy (rice) is extremely water-intensive — Punjab growing rice with groundwater in a region unsuited for it is unsustainable
• MSP distortions: High MSP for wheat and rice incentivises cultivation of water-intensive crops even in water-scarce areas
• Free electricity: Several states give free/subsidised electricity to farmers for pumping groundwater → no incentive to conserve

Exam Strategy

Prelims fact traps:

• Tehri Dam: tallest dam in India at 260.5 m on Bhagirathi river (not Ganga directly)
• Hirakud Dam: world's longest earthen dam at 25.8 km on Mahanadi
• Sardar Sarovar: Narmada river; 138.68 m height
• India's per capita water availability below 1,700 m³/year = water stress level
• Rani ki Vav (Gujarat): UNESCO World Heritage Site stepwell

Mains question patterns:

1. "Multi-purpose river projects are both the solution to and the cause of India's water crisis." Critically examine. (GS3)
2. "Traditional water harvesting systems are more sustainable than large dams." Do you agree? Discuss with examples. (GS3)
3. "The Narmada Bachao Andolan raises fundamental questions about the meaning of development in post-colonial India." Examine. (GS1/GS2)

Previous Year Questions

1. Critically examine the role of dams in India's development and their social and environmental costs. (UPSC Mains GS3, 2019 type)
2. "Water scarcity in India is a governance crisis, not just a physical scarcity problem." Discuss. (GS3)
3. Discuss the traditional water harvesting systems of India. How relevant are they in the 21st century? (GS1/GS3)
4. What are the main causes and consequences of groundwater depletion in India's key agricultural regions? (GS3)