Vanjiar River is a branch river of

Cauvery River The Kaveri (also known as Cauvery, the anglicized name) is one of the major Indian rivers flowing through the states of Karnataka and Tamil Nadu. The Kaveri river rises at Talakaveri in the Brahmagiri range in the Western Ghats, Kodagu dist ...

. It flows through the districts of

Thanjavur Thanjavur (), also Tanjore, Pletcher 2010, p. 195 is a city in the Indian state of Tamil Nadu. Thanjavur is the 11th biggest city in Tamil Nadu. Thanjavur is an important center of South Indian religion, art, and architecture. Most of the Gr ...

and

Karaikal Karaikal ( /kʌdɛkʌl/, french: Karikal /kaʁikal/) is a town of the Indian Union Territory of Puducherry. Karaikal was sold to the French by the Rajah of Thanjavur and became a French Colony in 1739. The French held control, with occasi ...

. This river finally merges with

Arasalar River The river Arasalar is a river that flows through Tamil Nadu and Pudducherry, and a tributary of Kaveri river which splits into 5 different rivers when it enters into Thanjavur district from Trichy. It separates from river Kaveri in the place nea ...

References

Rivers of Puducherry Rivers of Tamil Nadu {{India-river-stub