The lagoon is fed by number of small rivers and the Dutch canal. It is linked to the Indian Ocean by a narrow channel to the north, near Negombo. The lagoon and the marsh land area also support local agriculture and forestry.
The lagoon is sustained by numerous small rivers and the Dutch canal. It is connected to the Indian Ocean through a narrow passage near Negombo. The lagoon and adjacent marshland area also support local farming and forestry, which are closely related to its ecosystem.