Lake Bangweulu

Bangweulu — 'where the water sky meets the sky' — is one of the world's great wetland systems, comprising Lake Bangweulu, the Bangweulu Swamps and the Bangweulu Flats or floodplain. Situated in the upper Congo River basin in Zambia, the Bangweulu system covers an almost completely flat area roughly the size of Connecticut or East Anglia, at an elevation of 1,140 m straddling Zambia's Luapula Province and Northern Province. It is crucial to the economy and biodiversity of northern Zambia, and to the birdlife of a much larger region, and faces environmental stress and conservation issues. With a long axis of 75 km and a width of up to 40 km, Lake Bangweulu's permanent open water surface is about 3,000 km2, which expands when its swamps and floodplains are in flood at the end of the rainy season in May. The combined area of the lake and wetlands reaches 15,000 km2. The lake has an average depth of only 4 m, and a maximum depth of 10 m. The Bangweulu system is fed by about seventeen rivers of which the Chambeshi (the source of the Congo River) is the largest, and is drained by the Luapula River. Numbers in round brackets like so — (12) — refer to locations on the satellite image. A notable feature of the Bangweulu system is a series of parallel sandy ridges running south-west to north-east. These are particularly striking in satellite photographs and are easily seen along the north-western shore, the Lifunge Peninsula (2), Mbalala Island (3), Chilubi Island (6), and the Kapata Peninsula (10). They divide the lake into three sections parallel to its main axis. One divides off a section called Lake Chifunabuli (1), 50 km long but only 5 km wide. Its entrance through a gap in the sand spits (at the end of Lifunge Peninsula) is only 250 m wide. Another sandy ridge, Mbabala Island, divides off a section called Lake Walilupe (4), 30 km long by 13 km wide. The main, middle section of the lake between Ifunge and Mbabala is known only as Bangweulu. There are numerous bays, inlets, smaller lakes and lagoons around Lake Bangweulu, connected by open water, narrow channels or swamps.