Pennaiyar River
- Pennaiyar River is also known as Thenpannai.
- Origin: Eastern slope of Nandidurg Mountain (Chennakaseva Hills), Karnataka.
- It flows through Karnataka and Tamil Nadu.
- 77% drainage basin of the river lies in Tamil Nadu.
- Tributaries: Markandanadhi, Kambainallur, Pambar, Vaniyar, Kallar, Valayar etc.
- Pennaiyar river is mentioned in Sangam literature for its lush vegetation.
- Important temples on the river: Penneswaraar Temple, Dakshina Tirupati, Veerateshwarar Temple.
- Pennaiyar river is disputed between Karnataka and Tamil Nadu over Karnataka’s intent to construct a dam on Markandeya River (major tributary of Pennaiyar River).