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The Tamil Nadu government has approached the Supreme Court seeking a directive for Karnataka to release 26.954 TMC of Cauvery water. This action follows Karnataka's alleged failure to comply with the (CWMA) and (CWRC) directives to release 3,500 cusecs for 15 days, despite adequate storage in its reservoirs. The dispute centers around the historical allocation of water during distress years, highlighting ongoing challenges in inter-state river water sharing.
The Cauvery water dispute highlights the complexities of cooperative federalism and inter-state relations in India. The Constitution provides a framework for resolving such disputes under Article 262, which empowers Parliament to adjudicate disputes regarding inter-state rivers. This led to the enactment of the Inter-State River Water Disputes Act, 1956. The creation of bodies like the Cauvery Water Management Authority (CWMA) aims to institutionalize the sharing mechanism, but repeated non-compliance often forces states back to the Supreme Court. UPSC aspirants should analyze the effectiveness of these statutory bodies versus judicial intervention in resolving chronic disputes, considering the political compulsions faced by state governments, especially during rainfall deficit years.
The dispute is intrinsically linked to the geographical characteristics of the Cauvery basin and the dependency on monsoon patterns. The Cauvery river originates at Talakaveri in the Brahmagiri range in the Western Ghats, Karnataka, and flows through Tamil Nadu before emptying into the Bay of Bengal. The current crisis is exacerbated by a reported rainfall deficit in the upstream catchments (e.g., 42% deficit in the Kabini catchment). Understanding the hydrology, including the role of the South-West and North-East monsoons in filling reservoirs like Krishna Raja Sagara (KRS), Kabini, and Mettur, is crucial. Questions could focus on mapping the major dams, tributaries (Hemavathi, Harangi, Kabini, Bhavani), and how climate change-induced erratic rainfall patterns intensify distress sharing conflicts.
The governance challenge lies in defining and implementing a fair distress sharing formula. The Cauvery Water Disputes Tribunal (CWDT) mandated a specific monthly allocation, but implementation during distress years (when total rainfall is below normal) remains contentious. Tamil Nadu argues for a pro-rata assessment, claiming Karnataka should release water proportional to the deficit, rather than the absolute minimum ordered by the CWMA. This raises questions about the technical competence and authority of the CWMA to enforce its decisions against state governments prioritizing local agricultural and drinking water needs. The recurring need for Supreme Court intervention suggests a systemic failure in the dispute resolution mechanism, pointing towards a need for a more robust, perhaps technology-driven, transparent, and binding framework for real-time water management.