River Interlinking is not the solution for India’s Water Crisis

Context: 

At the 31st Southern Zonal Council meeting, the Union Home Minister proposed linking rivers from the Brahmaputra to the Godavari and Cauvery as a long-term response to India’s water scarcity. 

The proposal has revived debate over whether large inter-basin transfers can provide water security or merely redistribute existing ecological and political conflicts. 

India’s Water Paradox: 

• India supports over 18% of the global population with only about 4.2% of the world’s freshwater resources. Water availability is also highly uneven across seasons and regions.
• India’s annual per-capita water availability was estimated at 1,486 cubic metres in 2021, below the internationally recognised water-stress threshold of 1,700 cubic metres. It may decline to 1,367 cubic metres by 2031. 

This combination of monsoon concentration, recurrent floods, droughts and declining groundwater provides the rationale for river interlinking. 

What is River Interlinking?

• River interlinking involves transferring water through reservoirs and canals from a basin assessed as having surplus water to another considered water-deficient.
• The National Perspective Plan, 1980 identifies 30 links:
  • 14 under the Himalayan component
  • 16 under the Peninsular component
• The National Water Development Agency, established in 1982, undertakes water-balance studies and prepares feasibility and detailed project reports.
• By December 2025, pre-feasibility reports had been completed for all 30 links, feasibility reports for 26 and detailed project reports for 13. However, the Ken-Betwa Link Project remains the only priority project to have entered implementation. 

Potential Benefits of River Interlinking: 

• Water Equity and Food Security: Transfer from flood-prone surplus basins (Brahmaputra, Ganga) to chronically water-deficient regions (Bundelkhand, Rajasthan, coastal Andhra) would reduce regional inequalities in agricultural productivity. 
• Flood and Drought Mitigation: River-interlinking projects can simultaneously reduce peak flood discharges in surplus rivers by diverting excess monsoon runoff and recharge reservoirs in deficit areas before and after the monsoon.
• Hydropower and Renewable Energy: The dam infrastructure required for river-interlinking projects also creates significant hydropower potential. The NPP projects a total hydropower generation of approximately 34,000 MW across the complete programme, which is especially significant for states in the Himalayan component. 
• Inland Navigation and Connectivity: The 14,900-km network of canals envisaged under the NPP could substantially expand India’s inland waterway network, reducing the burden on overburdened road and railway infrastructure for bulk commodity transport- particularly coal, fertilisers, and agricultural produce.
• Revival of Seasonal Rivers: Transfers can augment lean-season flows in seasonal rivers, improving groundwater recharge in adjoining aquifers, sustaining riparian ecosystems, and supporting municipal water supply for towns dependent on these rivers in non-monsoon months.

Existing inter-basin transfers such as the Indira Gandhi Canal and the Parambikulam-Aliyar Project demonstrate that carefully designed transfers can produce regional benefits. 

Why River Linking Cannot be the Sole Solution?

• Questionable idea of surplus water: Surplus estimates are generally based on historical averages. They may not adequately account for climate-induced monsoon variability, future demands within the donor basin, groundwater interaction and the water required to sustain river ecosystems. A river carrying large monsoon flows is not necessarily surplus throughout the year.
• Ecological disruption: Reducing downstream flows can disturb sediment transport and nutrient cycles, damage wetlands, floodplains and fisheries, increase salinity intrusion in estuaries and deltas, fragment riverine habitats and affect groundwater recharge and coastal ecosystems. E.g., Kerala has opposed the Pamba-Achankovil-Vaippar link over its potential effects on the Vembanad wetland system.
• Limited capacity to control floods: Floods frequently result from intense local rainfall, floodplain encroachment, poor drainage and simultaneous high flows across tributaries. Long-distance canals cannot automatically absorb such short-duration flood peaks.
• Displacement and livelihood losses: Large reservoirs and canals require extensive land acquisition, affecting farmers, forest dwellers and tribal communities. Monetary compensation alone cannot replace community forests, cultural landscapes and livelihood networks.
• Federal and transboundary conflicts: 
  • Water falls under Entry 17 of the State List, subject to Parliament’s authority over inter-State rivers under Entry 56 of the Union List. Article 262 provides for adjudication of inter-State water disputes. This creates a framework of shared water governance, making inter-State cooperation and Centre-State coordination essential for river-linking projects.
  • Disagreements over the Pennaiyar, Cauvery, Mekedatu and other projects show that even existing allocations are difficult to resolve. Linking multiple basins would multiply questions concerning surplus determination, compensation and distress-year sharing. Himalayan links also require cooperation with Nepal, Bhutan and Bangladesh.
• Supply-induced demand: Additional supplies may encourage water-intensive crops, inefficient irrigation and urban expansion. Without demand management, newly transferred water may soon generate fresh scarcity.

Way Forward: Better Water-Security Strategy

River links should be considered selectively (not as a uniform national grid) and only after:

• climate-responsive basin-level hydrological assessments
• guaranteed environmental flows in donor rivers
• cumulative environmental and social-impact assessments
• prior rehabilitation and recognition of rights under the Forest Rights Act, 2006, Panchayats Extension to Scheduled Areas Act, 1996, and Land Acquisition, Rehabilitation and Resettlement Act, 2013.  
• transparent interstate benefit-sharing agreements
• independent post-project monitoring.

The larger priority must be demand-side management, including:

• crop diversification away from water-intensive rice and sugarcane
• micro-irrigation and scientific water budgeting
• groundwater regulation and aquifer management
• reform of electricity subsidies while protecting small farmers
• restoration of tanks, wetlands and floodplains
• rainwater harvesting and treated-wastewater reuse
• reduction of leakage in urban supply systems.

India’s water crisis arises not merely from inadequate supply but from ecological degradation, inefficient agriculture, groundwater over-extraction and fragmented governance. River interlinking may assist carefully selected water-deficient regions, but rivers are living ecological systems, not pipelines carrying unused water. Durable water security must begin with conservation, efficiency and cooperative river-basin governance.