quality:corruption, stylistic:style_transfer
Tributaries

Upper Zambezi: 507,200 km, discharges 1044 m /s at Victoria Falls, comprising:

Middle Zambezi cumulatively 1,050,000 km, 2442 m /s, measured at Cahora Bassa Gorge

Lower Zambezi cumulatively, 1,378,000 km, 3424 m /s, measured at Marromeu

Total Zambezi river basin: 1,390,000 km, 3424 m /s discharged into delta

Source: Beilfuss & Dos Santos (2001) The Okavango Basin is not included in the figures because it only occasionally overflows to any extent into the Zambezi.

Because of the rainfall distribution, northern tributaries contribute much more water than southern ones; for example: The Northern Highlands catchment of the upper Zambezi contributes 25%, Kafue 8%, Luangwa and Shire Rivers 16% each, total 65% of Zambezi discharge. The large Cuando basin in the south-west, though, contributes only about 2 m /s because most is lost through evaporation in its swamp systems. The 1940s and 1950s were particularly wet decades in the basin. Since 1975, it has been drier, the average discharge being only 70% of that for the years 1930 to 1958.