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
Kalambo River Kalambo River The Kalambo River forms part of the border between Zambia and Tanzania. It is a comparatively small stream which rises in the highlands north-east of Mbala at an elevation of about 1800 m and descends into the Albertine Rift, entering the southeastern end of Lake Tanganyika at an elevation of about 770 m, in a straight-line distance of only about 50 km. This accounts for its main claim to fame, its waterfall, Kalambo Falls, which is Africa's second highest falls (after South Africa's Tugela Falls). Below the falls, the river runs in a deep gorge. For more details