Mekedatu project dispute between Karnataka and Tamil Nadu

Notes

• The Mekedatu project is a proposed balancing reservoir-cum-drinking water project on the Cauvery river in Karnataka.
• Karnataka aims to use the project for drinking water supply to Bengaluru, hydroelectric power generation (400 MW), and regulation of river flow.
• Tamil Nadu opposes the project, citing concerns over water sharing and potential impact on its allocated share of Cauvery water.
• The Cauvery Water Disputes Tribunal (CWDT) award, as modified by the Supreme Court in 2018, mandates an annual release of 177.25 tmcft of water to Tamil Nadu at the Biligundlu border point.
• The Supreme Court, in a November 2025 judgment, ruled that the Central Water Commission (CWC) and the Cauvery Water Management Authority (CWMA) are the competent bodies to examine the project's feasibility.
• The court established that no state can interfere with the use of water allocated to another state unless it reduces the quantity of water allotted to it.
• The CWMA is a statutory body responsible for managing the Cauvery water distribution and monitoring the situation during the monsoon season.
• Inter-state water disputes have historically involved a shift from bilateral negotiations to adjudication through tribunals and oversight by statutory authorities.

Part of a longer story

This is day 1 of 26 in Mekedatu dam project dispute between Karnataka and Tamil Nadu, which has been running since 21 June 2026. Reading it whole is usually worth more than reading today alone — the exam asks how something developed.

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