The Save/Sabi River rises as the Sabi south of Harare and flows southeast from the Zimbabwean highveld to its confluence with the Odzi. It then turns south, drops over the Chivirira Falls, and is joined by the Lundi at the Mozambique border. The river continues as the Save, following an east-northeasterly course to its mouth near Mambone on the Mozambique Channel of the Indian Ocean.
The Maputo basin is shared by Mozambique, South Africa and Swaziland and includes the tributaries Pongola and Usuthu Rivers and the estuary. These riparian states establised in 1983 the "Tripartite Permanent Technical Committee" (TPTC) to agree on water use in the shared watercourses enabling sustainable development.