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 boundaries of the South African Republic (the Transvaal Republic). The South African Republic subsequently became the Transvaal Colony and then part of the Union of South Africa, while north of the Limpopo Matabeleland became part of Southern Rhodesia which became Zimbabwe. There is a single crossing at Beit Bridge, where the South African N1 highway and the Zimbabwean A6 highway are joined by the Alfred Beit Road Bridge. A separate bridge carries a railway line, which is connected to Pretoria in South Africa and to Rutenga and Bulawayo in Zimbabwe. South Africa–Zimbabwe border The border between South Africa and Zimbabwe