What are th names of the waterways of kerela?plz answer!need it for the social project!plz give the answer!?

The most important of Kerala’s forty four rivers include the Periyar (244 km), the Bharathapuzha (209 km), the Pamba (176 km), the Chaliyar (169 km), the Kadalundipuzha (130 km) and the Achankovil (128 km). The average length of the rivers of Kerala is 64 km.