Luangwa River ago, there was no way out and the Luangwa Rift filled with a Rift Valley Lake called the Madumabisa Lake, which rivalled Lake Malawi in size. The water of the lake overflowed in a river to the south-west, towards what is now the Kalahari, where it combined with the Okavango, Upper Zambezi, Cuando and Kafue rivers, emptying into the Limpopo River and flowing to the Indian Ocean. Several geological events combined to produce the current river systems. Faulting produced another graben just to the south of the Luangwa Rift, and running east-west: the Zambezi Rift Valley and the Chicoa Trough.
Zambezi nutrients. Wetland ecosystems downstream of the dam shrank considerably. Wildlife in the delta was further threatened by uncontrolled hunting during the civil war in Mozambique. The Kavango–Zambezi Transfrontier Conservation Area will cover parts of Zambia, Angola, Namibia, Zimbabwe and Botswana, including the famous Okavango Delta in Botswana and Mosi-oa-Tunya (The Smoke That Thunders, or Victoria Falls). It is thought that the cross-border park will help with animal migration routes and assist in the preservation of wetlands which clean water, as sewage from communities is a problem. Funding was boosted for cross-border conservation along the Zambezi in 2008. The Kavango–Zambezi Transfrontier