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Key Facts about Pennaiyar River

Feb. 3, 2026

The Supreme Court recently directed the Centre to constitute a tribunal to adjudicate the dispute between Tamil Nadu and Karnataka over the sharing of Pennaiyar River water.

About Pennaiyar River:

  • The Pennaiyar River is a major river in southern India flowing through Tamil Nadu and Karnataka.
  • It is also known as the South Pennar River, Dakshina Pinakini in Kannada, and Thenpennai, Ponnaiyar, or Pennaiyar in Tamil.
  • Course:
    • It originates in the Nandi Hills in the Chikkaballapura district of Karnataka.
    • It then flows through Tamil Nadu, where it enters the Bay of Bengal at Cuddalore.
  • Major tributaries are the Chinnar, Markanda, Vaniar, and Pamban.
  • It has reservoirs at Krishnagiri and Sathanur.

Ponnaiyar River Dispute:

  • It is a water-sharing dispute between the Indian states of Tamil Nadu and Karnataka.

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