Tamil Nadu CM Vijay's Karnataka visit to resolve Cauvery row cancelled
A planned meeting between the Tamil Nadu and Karnataka state governments to resolve an ongoing Cauvery water-sharing impasse was postponed.
Karnataka cited critically low reservoir levels and deficient monsoon rainfall as reasons for its inability to release the directed quantum of water to Tamil Nadu.
Tamil Nadu sought a release higher than the 3,500 cusecs directed under the existing Cauvery water-regulation mechanism, while Karnataka sought a reduction and deferment of the directed release.
Tamil Nadu's government separately approached the Supreme Court seeking directions for the release of Cauvery water in line with the applicable tribunal award.
Article 262 and the Inter-State River Water Disputes Act, 1956
Article 262 of the Constitution empowers Parliament to provide for adjudication of disputes over the waters of inter-state rivers or river valleys, and to bar the Supreme Court or any other court from exercising jurisdiction over such a dispute. Parliament exercised this power through the Inter-State River Water Disputes (ISRWD) Act, 1956, which enables the central government to constitute a tribunal to adjudicate a water dispute referred to it by a state government, once conciliation efforts fail.
Key Details
- Article 262(2) permits Parliament to exclude ordinary court jurisdiction over inter-state water disputes; Section 11 of the ISRWD Act, 1956 gives effect to this by barring the Supreme Court and other courts from entertaining an inter-state river water dispute that is validly referred to a tribunal.
- Once a tribunal's award is published in the official gazette, it has the same force as an order or decree of the Supreme Court and is final and binding on the party states.
- The bar under Article 262 applies to adjudicating a fresh water dispute — it does not prevent the Supreme Court from hearing petitions seeking enforcement or implementation of an award that a tribunal has already given, which is the constitutional basis on which the Court continues to entertain Cauvery-related petitions even after the tribunal's award.
A state government's approach to the Supreme Court in this dispute is best understood as an enforcement petition over an existing tribunal award rather than a fresh "water dispute" adjudication, which is why it does not conflict with the Article 262 bar.
The Cauvery Water Disputes Tribunal (CWDT) and Its 2007 Final Award
The Cauvery Water Disputes Tribunal was constituted by the central government on 2 June 1990 under the ISRWD Act, 1956, to adjudicate the water-sharing dispute among the Cauvery basin states. It delivered its final award on 5 February 2007, fixing the total available water in the Cauvery basin at 740 thousand million cubic feet (TMC) and allocating shares among the party states.
Key Details
- 2007 CWDT allocation: Tamil Nadu 419 TMC, Karnataka 270 TMC, Kerala 30 TMC, and Puducherry 7 TMC.
- The award also prescribed a "distress-sharing" principle: in years of deficient rainfall, the allocated shares of the basin states are to be reduced proportionately, though the tribunal did not specify precise operational guidelines for applying this formula — a recurring source of the recurring Karnataka–Tamil Nadu disagreement over compliance during low-rainfall years.
- The tribunal's composition in the award phase was chaired by a sitting/retired High Court judge with two other members, consistent with the general practice of constituting ISRWD Act tribunals from serving or retired Supreme Court/High Court judges.
Karnataka's stated reason for reduced water release — deficient rainfall — invokes precisely the distress-sharing clause of the 2007 CWDT award, while Tamil Nadu's demand for a higher release reflects its position that proportionate, not disproportionate, reductions should apply.
The 2018 Supreme Court Verdict and the Cauvery Water Management Authority
On 16 February 2018, the Supreme Court largely upheld the CWDT's 2007 award but modified the allocation, increasing Karnataka's share by 14.75 TMC (for Bengaluru's drinking water and groundwater needs) and correspondingly reducing Tamil Nadu's share. The Court also held that no state has proprietary rights over an inter-state river and declared the Cauvery a national asset. To implement the modified award, the central government notified the Cauvery Water Management Scheme, 2018, establishing the Cauvery Water Management Authority (CWMA) and the Cauvery Water Regulation Committee (CWRC).
Key Details
- Post-2018 allocation: Tamil Nadu 404.25 TMC, Karnataka 284.75 TMC, Kerala 30 TMC (unchanged), Puducherry 7 TMC (unchanged); the Court directed the arrangement to hold for 15 years.
- CWMA is a statutory, quasi-judicial body notified under Section 6A of the ISRWD Act, 1956, headquartered in New Delhi; the CWRC, its technical/regulatory arm, is based in Bengaluru and issues the periodic (including monthly and daily) water-release directions, such as the cusecs figures at issue in this dispute.
- CWMA/CWRC directions are binding on the party states but remain subject to appeal or clarification before the Supreme Court, which retains supervisory jurisdiction over implementation of its own 2018 judgment.
The specific release figure (3,500 cusecs) that Tamil Nadu and Karnataka disagree over would typically originate as a CWRC direction issued under the CWMA framework created after the 2018 verdict, making the current impasse a dispute over implementation of an already-adjudicated award rather than a new legal question.
- CWDT constituted: 2 June 1990, under the Inter-State River Water Disputes Act, 1956; final award delivered 5 February 2007.
- 2007 CWDT allocation (of 740 TMC total): Tamil Nadu 419 TMC, Karnataka 270 TMC, Kerala 30 TMC, Puducherry 7 TMC.
- 2018 Supreme Court-modified allocation: Tamil Nadu 404.25 TMC, Karnataka 284.75 TMC, Kerala 30 TMC, Puducherry 7 TMC; arrangement to hold for 15 years.
- CWMA and CWRC established: June 2018, under Section 6A of the ISRWD Act, 1956; CWMA headquartered in New Delhi, CWRC in Bengaluru.
- Constitutional basis: Article 262 (inter-state river water disputes); statutory basis: Inter-State River Water Disputes Act, 1956 (amended 2002).
- Disputed release figure in this instance: 3,500 cusecs directed release versus Tamil Nadu's demand for a higher quantum.