Periyar River
The longest river in Kerala
Length- 244 km (152 miles)
Source - Sivagiri Hills, Western Ghats
Mouth- Arabian Sea, Kochi
Basin area: 5,398 sq km (2,084 sq mi)
Flowing Districts- Idukki, Ernakulam, Kottayam
Tributaries of Periyar
Muvattupuzha
Perinjankutti
Cheruthoni
Edamalayar
Dams and Reservoirs in Periyar