<P> The Notwane River is a major tributary of the Limpopo, rising on the edge of the Kalahari Desert in Botswana and flowing in a north - easterly direction . The main tributary of the Limpopo, the Olifants River (Elephant River), contributes around 1,233 million m of water per year . Other major tributaries include the Shashe River, Mzingwane River, Crocodile River, Mwenezi River and Luvuvhu River . </P> <P> In the north - eastern corner of South Africa the river borders the Kruger National Park . </P> <P> The port town of Xai - Xai, Mozambique is on the river near the mouth . Below the Olifants, the river is permanently navigable to the sea, though a sandbar prevents access by large ships except at high tide . </P> <Ul> <Li> Notwane River </Li> <Li> Bonwapitse River </Li> <Li> Mahalapswe River </Li> <Li> Lotsane River </Li> <Li> Motloutse River </Li> <Li> Shashe River </Li> <Li> Umzingwani River </Li> <Li> Bubi River </Li> <Li> Mwenezi River </Li> <Li> Changane River </Li> </Ul>

In which country does the limpopo river system have its mouth