The Kala Oya is the third longest river in Sri Lanka. The long river has a basin size of , and more than 400,000 rural population live by the river basin.

Its catchment area receives approximately 3,169 million cubic metres of rain per year, and approximately 5 percent of the water reaches the sea. It has a catchment area of 1,792 square kilometers. Tributaries

Dambulu Oya Mirisgoni Oya Hawanella oya Moragolla Oya Maninda Oya

See also List of dams and reservoirs in Sri Lanka List of rivers of Sri Lanka

References