National River Linking Project

The National River Linking Project (NRLP) is India's flagship inter-basin water transfer programme, designed to relink rivers of the country's water-surplus basins to its water-deficit and drought-prone regions through a network of canals, dams, reservoirs, and lift schemes. Its intellectual lineage runs from Sir Arthur Cotton's nineteenth-century proposal to connect rivers for inland navigation, through K. L. Rao's 1972 "Ganga-Cauvery link" concept and Captain Dinshaw Dastur's 1974 "Garland Canal" proposal. The institutional basis was laid in 1980 when the Ministry of Water Resources framed a National Perspective Plan (NPP), and in 1982 the National Water Development Agency (NWDA) was established as an autonomous society under the ministry to conduct the surveys, feasibility studies, and detailed project reports that translate the perspective into engineered links.

The NPP divides the programme into two components comprising thirty identified links. The Himalayan Component envisages fourteen links that would build storage reservoirs on the principal tributaries of the Ganga and the Brahmaputra in India and Nepal, interlink the Ganga and Yamuna, and transfer surplus eastern waters westward to reduce flooding in Assam and Bihar while augmenting flows for irrigation. The Peninsular Component comprises sixteen links centred on a "Southern Water Grid," the core of which would divert surplus from the Mahanadi and Godavari basins southward to the Krishna, Pennar, and Cauvery, alongside links diverting west-flowing rivers and interlinking rivers near Mumbai and along the Kerala coast. The procedural sequence for any single link runs from pre-feasibility report, to feasibility report, to detailed project report (DPR), to inter-state memorandum of agreement, to environmental and forest clearances, and only then to funding and construction.

The legal architecture is shaped by the federal division of competence over water. Water is a State subject under Entry 17 of the State List in the Seventh Schedule of the Constitution, while the Union may legislate on inter-state rivers under Entry 56 of the Union List and adjudicate disputes under Article 262, operationalised through the Inter-State River Water Disputes Act, 1956. Because inter-basin transfers move water across state boundaries, every link requires consensual memoranda of understanding between concerned states before a DPR can be finalised, which makes political concurrence as decisive as engineering feasibility. A Special Committee on Interlinking of Rivers was constituted in 2014 to monitor progress, supported by a task force and sub-committees, after the Supreme Court intervened to accelerate the programme.

Among the thirty links, the Ken-Betwa Link Project (KBLP) in the Bundelkhand region straddling Madhya Pradesh and Uttar Pradesh is the first to advance to implementation. A tripartite memorandum of understanding between the Union government and the two states was signed in March 2021, and the Union Cabinet approved funding in December 2021 at an estimated cost of roughly ₹44,605 crore (2020-21 prices), with the Centre bearing about ninety per cent. Its centrepiece, the Daudhan Dam on the Ken, will transfer water to the Betwa basin and irrigate over a million hectares. The Godavari-Cauvery (Grand Anicut) link and the Par-Tapi-Narmada link have also reached advanced DPR stages, the latter facing resistance from tribal communities in Gujarat and Maharashtra.

The NRLP must be distinguished from adjacent schemes and concepts. It is broader than any single basin transfer such as the Telugu Ganga project, and distinct from the intra-state link programme, under which states like Maharashtra and Gujarat pursue their own river-linking within state boundaries outside the NPP's inter-state framework. It is also separate from watershed-management and rainwater-harvesting approaches championed by critics as decentralised alternatives, and from the Namami Gange and river-rejuvenation programmes, which target pollution and flow restoration rather than physical inter-basin diversion. Where a water-dispute tribunal allocates shares of an existing river, the NRLP physically reroutes water between catchments.

The project is among India's most contested infrastructure undertakings. Critics question the very premise of "surplus" and "deficit" basins, arguing the categorisation rests on dated hydrology that ignores environmental flow requirements and the impact of climate change on monsoon variability. The Ken-Betwa link drew sustained opposition because the Daudhan submergence area overlaps the Panna Tiger Reserve and critical tiger habitat, requiring wildlife clearance and forest diversion. Ecologists warn of disrupted sediment transport, threats to riverine and estuarine ecosystems, displacement of communities, and seismic risk in the Himalayan reservoirs. Trans-boundary dimensions add complexity, since several Himalayan links depend on storage in Nepal and affect flows into Bangladesh, implicating bilateral treaty obligations and lower-riparian sensitivities.

For the working practitioner, the NRLP is a recurring fixture of policy debate, civil-services examination syllabi, and federal water diplomacy. It illustrates the constitutional tension between national developmental ambition and state ownership of water, the institutional role of the NWDA and the Special Committee, and the practical reality that engineering feasibility is necessary but not sufficient where inter-state consent, environmental clearance, and trans-boundary negotiation each constitute a veto point. Understanding the NRLP requires holding together its hydrological logic, its federal legal constraints, and its ecological controversies, since the programme's trajectory over the coming decade will be determined as much by inter-state political bargaining as by canal alignments and reservoir capacities.