Zambia tributaries rise in Angola's central highlands. The edge of the Cuando River floodplain (not its main channel) forms Zambia's southwestern border, and via the Chobe River that river contributes very little water to the Zambezi because most is lost by evaporation. Two of the Zambezi's longest and largest tributaries, the Kafue and the Luangwa, flow mainly in Zambia. Their confluences with the Zambezi are on the border with Zimbabwe at Chirundu and Luangwa town respectively. Before its confluence, the Luangwa River forms part of Zambia's border with Mozambique. From Luangwa town, the Zambezi leaves Zambia and flows into Mozambique, and
Mozambique–South Africa border Mozambique–South Africa border The border between Mozambique and South Africa is divided into two segments, separated by the kingdom of Swaziland. The northern segment, which is long, runs north-south along the Lebombo Mountains from Zimbabwe to Swaziland. The southern segment, which is long, runs east-west across Maputaland from Swaziland to the Indian Ocean. The tripoint with Zimbabwe is located at Crooks' Corner, in the Limpopo River either at or very close to its confluence with the Luvuvhu River. The border runs in a straight line from this tripoint to the Shingwedzi River, and then along a series of straight lines