Swaziland is one of the best-watered countries in southern Africa. Major perennial rivers, which have their sources in South Africa, flow through the country to the Indian Ocean.
They are the Lomati, the Komati, the Umbuluzi, and the Usutu. The Usutu has the largest catchment in the country, with three main tributaries, the Usushwana, the Ngwempisi, and the Mkhondvo. In the south the Ingwavuma rises in western Swaziland and also cuts the Lubombo
The Great Usutu is Swaziland's largest river. It originates on the South African highveld and flows through central Swaziland and exiting the Kingdom near Big Bend. Then it meanders past Nduma in KwaZulu-Natal and up to the Bay of Maputo in Mozambique. The white-water rafting stretch that Swazi Trails make use of is roughly between the rural villages of Sidvokodvo and Siphofaneni, an area known as the Bulungapoort. The river is wide and at lower water levels it winds its way between numerous islands and sandbanks, which are otherwise covered during the full water season. The location is scenic with tall mountains and forested riverbanks, interspersed occasionally by rural Swazi homesteads. Although the river does change dramatically from full to low water season, there is always enough rapids to maker this day one to remember.