How can Karnataka clear the Cauvery backlog amid drought conditions, SC asks Tamil Nadu

The Inter-State River Water Disputes Act, 1956, enacted under Article 262 of the Constitution, governs the resolution of such conflicts. While Article 262 empowers Parliament to bar Supreme Court of India jurisdiction over water disputes, the Court often intervenes through Article 136 (Special Leave Petition) to ensure the enforcement of tribunal awards. The current situation involves the enforcement of the final award of the Cauvery Water Disputes Tribunal (CWDT), modified by the Supreme Court in 2018. The institutional mechanism for implementing this award comprises the Cauvery Water Management Authority (CWMA) and the Cauvery Water Regulation Committee (CWRC). A key UPSC focus is on the efficacy of these statutory bodies versus continuous judicial intervention. Karnataka argued that since the CWMA and CWRC are actively evaluating the situation and allocating water based on the distress conditions, further judicial intervention is unwarranted. This highlights the governance challenge of balancing expert administrative action with judicial oversight in complex resource allocation disputes.

The dispute centers on the Cauvery River basin, spanning Karnataka, Tamil Nadu, Kerala, and Puducherry. The geographical disparity in rainfall patterns is crucial. The upper riparian state (Karnataka) primarily depends on the South-West Monsoon (June-September) for reservoir inflow. The lower riparian state (Tamil Nadu) also receives rainfall from the South-West Monsoon but additionally benefits from the North-East Monsoon (October-December). Karnataka's defense emphasized this difference, arguing that while it faced acute drought due to a failed South-West Monsoon, Tamil Nadu could still expect replenishment from the impending North-East Monsoon. Furthermore, the geographic distribution of drought-prone areas and specific agricultural demands dictate state priorities. Karnataka prioritized its drinking water requirements for urban centers like Bengaluru and 'dry irrigation' for drought-affected areas, while Tamil Nadu emphasized the immediate need for water to sustain the highly water-intensive Samba cultivation in the Cauvery delta. UPSC often tests the geographical factors exacerbating resource conflicts.

The core governance challenge is managing resource allocation during a distress year (a year with deficient rainfall and inadequate water flow). The original water-sharing formulas are based on 'normal' flow years. The concept of a 'pro rata' or proportionate reduction becomes necessary during distress, but the formula for this reduction is often contested. The article highlights the conflicting priorities: historical irrigation claims vs. changing demographic needs. Tamil Nadu claimed a historical right to a larger share (404.25 tmcft out of 740 tmcft) for its established agriculture. Karnataka argued this historical allocation doesn't adequately account for its expanding drought-prone areas and the critical drinking water needs of its growing population. The governance priority during a crisis shifts significantly; as Karnataka asserted, drinking water must take precedence over irrigation. The UPSC tests the understanding of how governance frameworks adapt to scarcity and the equitable principles (like the 'Helsinki Rules' on equitable utilization) applied in resolving interstate water disputes.