Zambezi the overflow of the Zambezi in the rainy season. The delta of the Zambezi is today about half as broad as it was before the construction of the Kariba and Cahora Bassa dams controlled the seasonal variations in the flow rate of the river. Before the dams were built seasonal flooding of the Zambezi had quite a different impact on the ecosystems of the delta from today as it brought nutritious fresh water down to the Indian Ocean coastal wetlands. The lower Zambezi experienced a small flood surge early in the dry season as rain in the Gwembe catchment and
Zambezi River Authority Zambezi River Authority also plays a role in managing the use of water from Lake Kariba for irrigation and for domestic, industrial and institutional use. There has been tension between the countries that border the river. In the early 1990s, Zimbabwe proposed to build a pipeline to carry water south to supply the city of Bulawayo. Botswana also proposed to carry water south to Gaborone through an extension to the North-South Carrier (NSC). Some of the NSC water could be shared with South Africa. These projects raised concern with downstream countries threatened by loss of water. The question of claims