Overview
The southwest monsoon has been weak in its first half, creating a fresh distress situation in the Cauvery basin. While heavy rains have raised water levels in Karnataka’s reservoirs, the two states have not yet agreed on a distress‑sharing formula. Political protests are being planned in both states as the water shortage continues.
Key Developments (July 2026)
- July 30, 2026: The Cauvery Water Management Authority (CWMA) approved the Cauvery Water Regulation Committee (CWRC)’s order to release 3,500 cusecs (≈ 3.5 tmc ft per day) at Billigundulu for 15 days starting July 29.
- Karnataka’s Congress government refused to release scheduled irrigation water, citing an anticipated drinking‑water shortage.
- Tamil Nadu received only about 3.6 tmc ft from June 1 to July 30, roughly 10 % of the Cauvery Water Disputes Tribunal and Supreme Court prescribed quota of 40 tmc ft.
- Pro‑Kannada groups announced a Karnataka bandh on August 13, 2026; the DMK plans a rally in Thanjavur on August 3, 2026 coinciding with the Aadi Perukku festival.
Important Facts
- Four major Karnataka reservoirs recorded a surge in inflows, yet tmc ft released at Billigundulu was only about 1 tmc ft against the stipulated 31 tmc ft for July.
- The CWMA’s directive, while insufficient for Tamil Nadu’s irrigation needs, would have helped the river ecosystem.
- Both chief ministers – DK Shivakumar (Karnataka) and C J Vijay (Tamil Nadu) – have had limited direct contact; Vijay’s request to visit Bengaluru was deferred.
Exam Relevance
Water disputes test the functioning of inter‑state tribunals, statutory authorities, and federal cooperation – core topics for GS 2 (P