Irrigation: Strategic Water Resource Management

UPSC Mains PYQs

• Irrigation & Water-Use Efficiency: "With growing water scarcity, maximizing water-use efficiency in agriculture is critical to sustain production." Suggest measures to improve water-use efficiency in Indian agriculture. Evaluate the role of the 'Per Drop More Crop' initiative under the Pradhan Mantri Krishi Sinchayee Yojana (PMKSY). (15 Marks, 250 Words)

🔮 Expected UPSC Trends & Future Questions

• Core Themes:
  • Groundwater Depletion & Solar Pumps: Analyzing how PM-KUSUM (solarized tubewells) can potentially accelerate groundwater depletion if demand-side controls (net-metering) are not enforced.
  • Drip and Sprinkler Saturation in dry belts: Targeting micro-irrigation in water-stressed cotton and sugarcane growing belts of Maharashtra and Karnataka.
  • Community-Led Watershed Management: Replicating successful models of participatory watershed management (e.g., Ralegan Siddhi) to recharge local aquifers.
• Expected future Mains Questions:
  • Q1: Discuss how the National Hydrology Project (NHP) and aquifer mapping assist in developing localized groundwater recharge master plans. (15 Marks, 250 Words)
  • Q2: Explain the concept of 'virtual water trade' and analyze its implications for India's export-oriented agricultural policy. (10 Marks, 150 Words)
• High-Yield Facts & Analytical Angles:
  • Groundwater Over-extraction: India is the largest extractor of groundwater in the world, extracting more than the US and China combined, with agriculture accounting for over 85-90% of it.
  • Efficiency Disparity: Drip irrigation systems offer up to 85-90% water-use efficiency compared to the extremely low 30-40% efficiency of traditional canal-based flood irrigation.

📊 High-Yield Data & Statistical Fact Sheet

• Agriculture GVA contribution: Agriculture and allied sectors contribute ~18.2% to India's Gross Value Added (GVA).
• Agricultural workforce ratio: Farming sector employs ~45.8% of India's total workforce, reflecting labor surplus and low productivity.
• Food Processing growth rate: The food processing industry (FPI) registered an average annual growth rate of ~8.3% over the last 5 years.
• Cold Chain Infrastructure gap: India suffers a 30-40% capacity deficit in cold storage and cold chain transport for perishables.
• FPI employment footprint: Food processing accounts for ~10.4% of manufacturing jobs and ~11.6% of agricultural exports.
• PMFME Scheme funding: Budgetary outlay of ₹10,000 Crore to support 2 Lakh micro-enterprises under the formalization scheme.
• FCI Buffer Stocks levels: FCI maintains grain reserves (Wheat & Rice) that frequently exceed the buffer requirement of 21-41 MMT.
• Grain Procurement cost disparity: FCI's economic cost of acquiring grains is ~40% higher than the basic MSP due to statutory taxes and margins.
• PM-KISAN Direct Support: Cash transfers of ₹6,000 annually to over 11 Crore small and marginal farmers.
• Fertilizer Subsidy Outlay: Crossed ₹1.7 Lakh Crore, driving highly skewed N-P-K fertilizer consumption ratios of ~8:3:1.
• Landholding Fragmentation rate: Average holding size declined to 1.08 Hectares, with small farmers owning 86% of total land holdings.
• Micro-Irrigation expansion (PMKSY): Deployed drip and sprinkler systems covering over 78 Lakh Hectares of cultivated fields.
• e-NAM Mandi Integration: Digitally integrated 1,360+ wholesale mandis across 22 states, registering 1.7 Crore farmers.
• Organic Farming Coverage: NPOP certified organic cultivation spans ~5.3 Million Hectares, led by Sikkim as the first 100% organic state.
• Agricultural Credit Flow: Targets scaled to ₹20 Lakh Crore in national budgets, providing crop loan interest subventions.
• Post-Harvest Loss values: Poor storage and logistics lead to foodgrain and horticultural losses worth ₹92,600 Crore annually.
• PM Fasal Bima Yojana (PMFBY): Crop insurance scheme covering over 5 Crore farmers, with subsidized premiums (1.5% Rabi, 2% Kharif).
• National Beekeeping Mission: Allocation of ₹500 Crore to promote scientific beekeeping under the Honey Revolution.
• AHIDF Infrastructure funding: Outlay of ₹15,000 Crore to incentivize private sector dairy and meat processing units.
• NMEO-Oil Palm targets: Outlay of ₹11,040 Crore targeting 10 Lakh Hectares of oil palm by 2026 to cut import dependency.

Artificial application of water to land; critical for Yield stability.

Visual: Sources of Irrigation & Micro-Irrigation Targets

Net Irrigated Area by Source (%)

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Micro-Irrigation Coverage Targets (Lakh Hectares)

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Source: Ministry of Agriculture / PIB Releases. Key Insight: Groundwater remains the primary irrigation source, leading to aquifer depletion in intensive cropping zones. Modernization programs scale micro-irrigation coverage to increase water-use efficiency and reduce excessive extraction.

1. Types & Categorization

• Major and Medium: Canal networks and large multi-purpose river valley reservoirs.
• Minor Irrigation: Tubewells, dug wells, and localized surface water structures representing the largest share of net irrigated area.
• Micro-Irrigation: High-efficiency localized drip systems and portable overhead sprinkler configurations.

2. Resource Performance and Challenges

Irrigation Systems: Comparative Efficiency and Soil Health

• Water-Use Efficiency: Micro-irrigation methods like drip and sprinkler achieve ninety percent water-use efficiency compared to only thirty to forty percent for conventional flood irrigation.
• Soil Degradation Risks: Sustained flood irrigation elevates water tables in semi-arid zones, transporting dissolved salts to the surface and causing soil salinization.
• Energy Subsidies Impact: Highly subsidized or free electricity for agriculture drives excessive groundwater extraction, lowering regional water tables.

Institutional Frameworks & Micro-Irrigation Adoption

• Micro-Irrigation Saturation: Per Drop More Crop initiatives focus on installing localized drip networks to protect dryland crop yields.
• Aquifer Mapping: High-resolution aquifer mapping under national hydrology programs monitors groundwater stress levels across critical agricultural zones.
• Watershed Management: Community-level check dams and farm ponds recharge local aquifers and reduce soil erosion.

3. Conclusion

Water Resource Focus

Transitioning agricultural policy from supply-side water development to demand-side management is essential to secure groundwater aquifers in arid cropping tracts.