Shashe River Shashe is a sand filled channel, with extensive alluvial aquifers in the river channel and below the alluvial plains. These supply water for a number of irrigation schemes including Sibasa and Shashi. More than two million years ago, the Upper Zambezi River used to flow south through what is now the Makgadikgadi Pan (presently a vast seasonal wetland) to the Shashe River and thence the Limpopo River. There is a road bridge and a rail bridge south of Francistown. The lower Shashe River forms the border between Botswana and Zimbabwe and is unbridged. However, at Tuli, both sides of the
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