Rewa River, longest and most important stream of Fiji, South Pacific Ocean. Rising in north-central Viti Levu on the flanks of Tomanivi, Fiji’s highest point (4,344 feet [1,324 metres]), it flows southeast for 90 miles (145 km) to its mouth at Laucala (Lauthala) Bay on the southeast coast, near Suva (the national capital). The river drains one-third of the island, and its valley and fertile deltas support vegetable, rice, and dairy production. Small steamers are able to navigate upstream for 50 miles (80 km).