Zambia and south covering about three-quarters of the country; and the Congo basin in the north covering about one-quarter of the country. A very small area in the northeast forms part of the internal drainage basin of Lake Rukwa in Tanzania. In the Zambezi basin, there are a number of major rivers flowing wholly or partially through Zambia: the Kabompo, Lungwebungu, Kafue, Luangwa, and the Zambezi itself, which flows through the country in the west and then forms its southern border with Namibia, Botswana and Zimbabwe. Its source is in Zambia but it diverts into Angola, and a number of its
South Africa–Zimbabwe border South Africa–Zimbabwe border The border between South Africa and Zimbabwe is long, and follows the median line of the Limpopo River. The western tripoint with Botswana is located at the confluence of the Shashe River with the Limpopo. The location of the eastern tripoint with Mozambique is not entirely certain; it is situated either at the confluence of the Luvuvhu River with the Limpopo, or at a point nearby in the Limpopo defined by beacons on the Mozambique–Zimbabwe border. The border was established by the Pretoria Convention of 1881 and restated by the London Convention of 1884 which defined the