Despite a final SC verdict (2018) and a standing authority, the Cauvery dispute recurs every deficit year. Examine the gaps in India's inter-State water dispute framework.

The Supreme Court's verdict of 16 February 2018 fixed Karnataka's normal-year release to Tamil Nadu at 177.25 TMC at Biligundlu [1]. The CWMA and CWRC were constituted on 1 June 2018 to enforce it [3]. Yet in October 2026 the SC again heard Tamil Nadu's plea over an 11.719 tmc ft shortfall [4]. Allocating water has not ended the dispute.

Gaps exposed by the Cauvery case

• No binding distress formula: awards fix volumes for a normal year. The SC itself observed that a backlog "can be covered only when there is excess water" [4]. Deficit-year sharing is left to fresh bargaining.
• Weak enforcement: the authority's directions lack penal teeth, so States return to the SC under its civil original jurisdiction [2]. The court ends up managing water day to day.
• Unsettled priorities: Karnataka puts drinking water first, while Tamil Nadu's Samba paddy suffers. Each side cites different monsoons [4]. The framework has no hierarchy of uses.
• Slow, ad hoc tribunals: under the ISRWD Act, 1956, tribunals get three years, extendable by two. A scheme to implement an award is optional [5]. Hence Cauvery needed an SC push before any authority existed.
• Data distrust: no single basin data bank is accepted by both States. The 2019 Bill proposes an authorised agency to maintain one [5].

Way forward

• CWMA should notify a transparent pro-rata distress formula linked to real-time inflows and storage.
• Enact the ISRWD (Amendment) Bill, 2019, passed by Lok Sabha [5]. It provides a single permanent tribunal and a Disputes Resolution Committee to negotiate first. It also sets a 2+1-year timeline and a mandatory implementation scheme [5].
• Use telemetry at reservoirs and Biligundlu, with public dashboards, to cut disputes over facts.
• Manage demand through micro-irrigation and less water-intensive delta cropping.

The Cauvery case shows that India's framework can adjudicate shares but cannot manage scarcity. A binding distress formula, an empowered CWMA and a permanent tribunal would shift basin governance from litigation to cooperative federalism. This would advance SDG 6 on sustainable water management.