The Supreme Court directs the Centre to constitute a tribunal to settle the Pennaiyar river dispute between T.N. and Karnataka.
It directed the Central government to issue a notification to constitute the inter-State water disputes tribunal within a month.
Tamil Nadu argued that the flow of water of an inter-State River is a national asset and no single state can claim exclusive ownership of its water.
The state also said than an 1892 agreement over the river water was “valid and binding” on the party States.
The State further said that a river even included the stream, tributaries and other streams contributing water directly or indirectly into it.
The major tributary, Markandeyanadhi, which has its catchment area both in Karnataka and Tamil Nadu, cannot be considered to be out of the purview of the Agreement.
The South Pennar River is known as Thenpennai, Ponnaiyar or Pennaiyar in Tamil.
It is the second longest river in Tamil Nadu, with a length of 497 km, after the Kaveri.
The river originates in the Nandi Hills in the Chikkaballapura district of Karnataka and flows through Tamil Nadu before emptying into the Bay of Bengal.
The largest dam on this river is Sathanur Dam near Tiruvannamalai.
It splits into a delta on which Cuddalore town is located.