Irrigation: Strategic Water Resource Management

1. IRRIGATION SOURCES & THE GROUNDWATER DEPENDENCE PROBLEM

Cue Words	Notes
Source-Wise Composition	Groundwater (wells/tubewells) supplies roughly 64% of net irrigated area, followed by canals (~24%), with tanks and other sources making up the remainder — a composition skewed heavily toward an extractive, largely unregulated source. 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 total extraction.
Energy Subsidies & Over-Extraction	Highly subsidised or free agricultural electricity removes the marginal cost of pumping, driving excessive groundwater withdrawal and steadily lowering regional water tables in intensive cropping zones. PM-KUSUM's solarised tubewells risk accelerating this depletion further if demand-side controls such as net-metering and buyback incentives aren't strictly enforced alongside solarisation — a live policy tension between clean-energy goals and aquifer protection.

> **Summary**: Groundwater dominates India's irrigation mix but is being extracted at a globally unmatched rate, and energy-subsidy-driven over-pumping means even green initiatives like PM-KUSUM can worsen depletion unless paired with binding demand-side metering.

🔗 Ken-Betwa Link Project — Union Budget 2022-23 Outlay 2022

Cue Words	Notes
What did the Union Budget 2022-23 (1 Feb 2022) allocate for the Ken-Betwa Link Project?	**Ken-Betwa Link Project**: outlay of **₹1,400 crore** announced, to benefit **9.08 lakh hectares of farmers' land** through irrigation.

🔗 MoA Signed for Ken-Betwa Link Project (World Water Day, Mar 2021) 2021

Cue Words

Notes

What political agreement preceded the Cabinet's approval of the Ken-Betwa Link Project?

On **22 March 2021** (World Water Day), PM Modi witnessed — via video conference — the Union Jal Shakti Minister and the Chief Ministers of **Madhya Pradesh** and **Uttar Pradesh** sign a historic **Memorandum of Agreement (MoA)** on the Ken-Betwa Link Project (KBLP), the origin inter-state political agreement that preceded the Union Cabinet's funding/implementation approval (8 December 2021, see below). KBLP is the **first project** under India's **National Perspective Plan** for river interlinking, originally prepared by the then-Ministry of Irrigation to transfer water from surplus to deficit river basins. For full project specifications (irrigation area, drinking water supply, hydropower capacity, and covered Bundelkhand districts), see the Cabinet-approval entry below.

🔗 Cabinet Approves Ken-Betwa Link Project — India's First River Interlinking Scheme 2021

Cue Words	Notes
What did the Union Cabinet approve for the Ken-Betwa Link Project, and what is its full scope?	The **Ken-Betwa River Interlinking Project (KBLP)** is India's **FIRST** major centrally-driven river interlinking project. Total project cost: **₹44,605 crore** (2020-21 prices) — this Cabinet-approved figure is the definitive full-project cost, distinct from and superseding the smaller **₹1,400 crore** Union Budget 2022-23 year-wise allocation noted above. Union Cabinet approved central support of **₹39,317 crore** (₹36,290 crore grant + ₹3,027 crore loan), to be implemented over **8 years** through a Special Purpose Vehicle — the **Ken-Betwa Link Project Authority (KBLPA)**. The project transfers water from the Ken to the Betwa river via the **Daudhan Dam**, a connecting canal, the **Lower Orr Project**, **Kotha Barrage**, and the **Bina Complex Multipurpose Project**.
What are the benefits and which districts/states does the project cover?	Provides annual irrigation to **10.62 lakh hectares** in the perennially drought-prone **Bundelkhand region**, covering Panna, Tikamgarh, Chhatarpur, Sagar, Damoh, Datia, Vidisha, Shivpuri, and Raisen districts (Madhya Pradesh) and Banda, Mahoba, Jhansi, and Lalitpur districts (Uttar Pradesh). Supplies drinking water to roughly **62 lakh people**, and generates **103 MW hydropower** plus **27 MW solar power**. A comprehensive landscape management plan for environmental safeguards was under finalisation by the **Wildlife Institute of India**.
What is the background to this Cabinet approval?	The agreement to implement the Ken-Betwa project was signed on **22 March 2021** between the Union Jal Shakti Minister and the Chief Ministers of Madhya Pradesh and Uttar Pradesh, realising former PM **Atal Bihari Vajpayee's** river-interlinking vision. The Cabinet approval followed on **8 December 2021**.

2. MICRO-IRRIGATION: EFFICIENCY GAINS & SCALE-UP

Cue Words	Notes
Efficiency Disparity	Drip and sprinkler micro-irrigation deliver up to 85-90% water-use efficiency, versus just 30-40% efficiency for traditional canal-based flood irrigation — meaning roughly half of water applied via flood methods is lost to seepage/evaporation rather than reaching crop roots.
PDMC / PMKSY Coverage & Targets	Per Drop More Crop (PDMC), the micro-irrigation component of PMKSY since 2015-16, targets 109 Lakh Hectares of coverage by 2029-30; as of August 2025 roughly 96.83 Lakh Hectares had been brought under micro-irrigation cumulatively. The Union Budget 2026-27 allocated roughly ₹6,587 Crore to PMKSY overall, with PDMC now also linked to the PM Dhan-Dhaanya Krishi Yojana covering 100 low-productivity districts — signalling a shift toward geographically targeted saturation rather than uniform national rollout. A further target of an additional 100 Lakh Hectares under micro-irrigation has been set, reflecting continued policy emphasis on closing the efficiency gap even as overall scheme outlays fluctuate.
Priority Belts	Drip/sprinkler saturation is being targeted specifically in water-stressed cotton and sugarcane belts of Maharashtra and Karnataka, where crop water demand is highest relative to local rainfall reliability.

> **Summary**: Micro-irrigation more than doubles water-use efficiency versus flood irrigation, and PDMC/PMKSY funding is increasingly concentrated on high-stress belts and low-productivity districts, but cumulative coverage (~97 Lakh Hectares) still trails the 2029-30 target, showing the saturation drive remains a work in progress.

3. SOIL, AQUIFER & WATERSHED MANAGEMENT

Cue Words	Notes
Soil Degradation from Flood Irrigation	Sustained flood irrigation in semi-arid zones raises water tables and draws dissolved salts to the surface, causing soil salinisation that progressively degrades long-run productivity even where short-run yields look stable.
Aquifer Mapping & Hydrology Programmes	High-resolution aquifer mapping under the National Hydrology Project (NHP) monitors groundwater stress across critical agricultural zones, feeding into localised recharge master plans rather than one-size-fits-all regulation.
Community-Led Watershed Models	Participatory watershed management — check dams, farm ponds, and community-led recharge structures modelled on successes like Ralegan Siddhi — restores local aquifers and reduces soil erosion, offering a demand-side/community complement to top-down infrastructure schemes.

> **Summary**: Beyond source-level and efficiency reforms, sustainable irrigation also requires managing soil salinisation risk and scaling participatory watershed and aquifer-mapping models that engage communities directly in groundwater recharge.

4. TRADE & POLICY DIMENSIONS

Cue Words	Notes
Virtual Water Trade	India's export-oriented agricultural policy implicitly exports large volumes of embedded ('virtual') water through water-intensive crops like rice and sugar — a concept increasingly cited in debates on whether export incentives for such crops are ecologically sustainable given domestic water stress.

> **Summary**: Framing India's crop exports through a virtual-water lens exposes a policy contradiction — incentivising exports of water-intensive rice and sugar while simultaneously running national programmes (PDMC, aquifer mapping, watershed management) to conserve the same water domestically.

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)
• Aquifer Mapping & Recharge: Discuss how the National Hydrology Project (NHP) and aquifer mapping assist in developing localized groundwater recharge master plans. (15 Marks, 250 Words)
• Virtual Water Trade: Explain the concept of 'virtual water trade' and analyze its implications for India's export-oriented agricultural policy. (10 Marks, 150 Words)