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VOL. I · EST. 11.2025 
SatyaDheesh
सत्याधीश
India's Ground Truth Record
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Tamil Nadu demands Karnataka clear 15.02 tmc ft Cauvery water backlog

GS2Polity · Governance · IR· India's bilateral relations· Prelims + Mains·

Inter-state water disputes and riparian rights: a key GS2 and GS3 topic regarding federalism.

Why in news

The Supreme Court reserved an order on Tamil Nadu's application demanding that Karnataka clear a 15.02 tmc ft Cauvery water backlog caused by a 30% rainfall deficit.

Background

The Cauvery Water Regulation Committee reported only 45.849 tmc ft realized against a 57.568 tmc ft requirement. Karnataka cited a 54% reservoir inflow deficit as a reason for the backlog.

Facts for Prelims

  • FactTamil Nadu demanded a 15.02 tmc ft backlog clearance from Karnataka.
  • FactKarnataka reported a 54% reservoir inflow deficit.
  • FactThe Cauvery Water Regulation Committee reported 45.849 tmc ft realized against a 57.568 tmc ft requirement.

Prelims practice question

What was the reservoir inflow deficit reported by Karnataka regarding the Cauvery water backlog?

  1. (a)30%
  2. (b)15.02%
  3. (c)54%
  4. (d)45.8%
Show answer

Answer: (c) 54% — Karnataka cited a 54% reservoir inflow deficit as the reason for the water backlog.

For Mains

Q. Discuss the challenges in inter-state water sharing and the role of judicial intervention in resolving riparian disputes in India.

Dimensions to cover in your answer

  • Federal friction: Conflict between state-level water rights and federal oversight of river basin management
  • Data asymmetry: Discrepancies in reported rainfall and inflow data affecting equitable distribution
  • Climate vulnerability: Impact of erratic rainfall patterns on the sustainability of existing water-sharing agreements

Keywords: inter-state water dispute · riparian rights · judicial activism · water scarcity · federalism

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