Луангва
The South Rukuru rises in southern Mzimba District, and flows roughly north-northeast to empty into Lake Malawi. Its watershed mostly lies in the Mzimba Plain. Its tributaries drain the western slopes of the Viphya Mountains. To the east, a low divide which forms the Malawi-Zambia border separates the South Rukuru's watershed from that of Luangwa River in Zambia. The lower valley of the river separates the northern end of the Viphya Range from the Nyika Plateau to the north.