Archive · 4 Sep 2026
Cauvery Water Dispute Intensifies Amid Severe Regional Rainfall Deficit
The Cauvery is a river shared by Karnataka and Tamil Nadu.
When there is little rain, both states have less water.
This year, the reservoirs in the Cauvery basin are only partly full.
Tamil Nadu opened the gates of the Mettur reservoir to provide water for farmers.
A water-management authority told Karnataka to send 9,000 cusecs to Tamil Nadu for 15 days.
Karnataka said it was following that direction.
Tamil Nadu said it also needed water that had not been released earlier and asked the Supreme Court for help.
The article says both states should agree on a fair plan for sharing water during dry years.
Cauvery basin reservoirs in Karnataka are at 55.7% of capacity after deficient rainfall.
Tamil Nadu opened Mettur’s Stanley reservoir gates on September 1 for 45 days of samba-paddy irrigation.
The Cauvery Water Management Authority directed Karnataka to release 9,000 cusecs for 15 days.
Tamil Nadu asked the Supreme Court to address the release shortfall and accumulated deficits.
The dispute has renewed calls for distress-sharing, political dialogue, and less water-intensive farming.
- Who
- Karnataka and Tamil Nadu are the main states involved; Kerala and Puducherry are also identified as parties that should be included in discussions.
- What
- The states are disputing how much Cauvery water Karnataka must release to Tamil Nadu during a rainfall deficit.
- When
- The Cauvery Water Management Authority issued its latest direction on August 25, covering August 26 to September 8; Tamil Nadu began a 45-day release from September 1.
- Where
- The dispute concerns the Cauvery basin, including Karnataka and Tamil Nadu; the Mettur reservoir is in Salem district, Tamil Nadu.
- Why
- Rainfall is deficient, reservoir storage is low, and Tamil Nadu says recent flows from Karnataka have been insufficient for irrigation.
Tamil Nadu’s Position
Karnataka’s Position
Required water releases
Tamil Nadu’s Position
Tamil Nadu is seeking its share under the Cauvery Water Management Authority’s directions and says Karnataka’s recent flows have been considerably diminished.
Karnataka’s Position
Karnataka told the Supreme Court that it is complying with the authority’s direction to release water.
Additional shortfall
Tamil Nadu’s Position
Tamil Nadu has asked the Supreme Court to direct Karnataka to make good the accumulated shortfall from earlier releases.
Karnataka’s Position
Karnataka’s stated position, as reported, is compliance with the current authority direction; the article says Tamil Nadu was urged to challenge any request beyond that decision through the appropriate forum.
Long-term water management
Tamil Nadu’s Position
Tamil Nadu needs reliable access for irrigation and has been encouraged to use lower-water paddy varieties and direct sowing.
Karnataka’s Position
Karnataka emphasizes its position as the upper riparian state and plans the Mekedatu Dam to supply drinking water to Bengaluru, despite opposition from lower riparian states.
- Reservoir storage
- Seven major reservoirs in the Cauvery basin were filled to 55.7% of capacity.
- Mettur reservoir
- Water stored there was reported at 55% of live storage capacity.
- Tamil Nadu release
- The release from Mettur was planned for 45 days beginning September 1.
- CWMA direction
- Karnataka was directed to ensure a flow of 9,000 cusecs for 15 days.
- Covered period
- The specified flow period ran from August 26 to September 8.
- Tamil Nadu request
- Tamil Nadu also sought compensation for an accumulated shortfall in earlier releases.
- Proposed infrastructure
- Karnataka has plans for the Mekedatu Dam, opposed by lower riparian states.