A new study suggests that the Zambezi River, Africa’s fourth-longest, is 11% longer than previously thought, with its most distant source lying in Angola, not Zambia. While the finding leaves the Zambezi as Africa’s fourth-longest river — after the Nile, the Congo and the Niger — the redefinition of its most distant source underscores Angola’s […]

A new study suggests that the Zambezi River, Africa’s fourth-longest, is 11% longer than previously thought, with its most distant source lying in Angola, not Zambia. While the finding leaves the Zambezi as Africa’s fourth-longest river — after the Nile, the Congo and the Niger — the redefinition of its most distant source underscores Angola’s enormous contribution to sustaining the river best known for Victoria Falls. This newly identified source in Angola’s southern highlands sits 3,421 kilometers (2,126 miles) from the Zambezi’s mouth at the Indian Ocean — 342 km (213 mi) farther than its original source, a spring bubbling out of the ground in a marshy patch of woodland near the Zambian town of Mwinilunga. The source of the Lungwebungu River in Angola: Spanning a total of 1,032 km (640 miles), the river is an essential water source, contributing significantly to the flow of the upper Zambezi River. Image courtesy Rainer von Brandis /The Wilderness Project/NGOWP. The geographic definition of a river’s source is the farthest point from its mouth, and based on that criterion, the team behind the study published in the journal Hydrology and Earth System Sciences has identified the source of the Zambezi as a small trickle oozing from a peatland bog in southern Angola, which is also the source of a river known as the Lungwebungu. Lead author Rainer von Brandis of The Wilderness Project (TWP), a group of scientists and explorers that conducted the study, says the findings highlight the critical importance of the…This article was originally published on Mongabay

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