A Congo headwater lake once hosted Kilwa Island slave traders
Lake Mweru sits on Africa’s Congo River’s longest arm, drawing a 110-kilometre border between Zambia and the Democratic Republic of the Congo. Arab and Swahili ivory traders once based themselves on Kilwa Island before pushing inland to Kazembe and Luba courts.
The Luapula arrives through southern swamps and the Kalungwishi from the east; the Luvua leaves the north end toward the Lualaba and Congo. Average dimensions near 118 by 45 kilometres put the surface at 917 metres elevation, higher than Tanganyika at 763. Two northeastern hollows reach 20 and 27 metres; the south stays shallower. Unlike many seasonal African lakes, Mweru’s level and area stay relatively steady despite wet–dry swings. The level rises and falls only about 1.7 metres a year, peaking in May and bottoming in January, because the Bangweulu Swamps upstream absorb the flood and the swift, unchoked Luvua quickly drains any surplus.
Mweru simply means “lake” in several Bantu languages. Marshy Mweru Wantipa lies about fifty kilometres east, usually endorheic yet sometimes linked through dambos when floods peak. Portuguese agents visiting Kazembe between 1796 and 1831 likely knew the water; Livingstone later publicized slave-trade suffering north and east of the shores, though raids continued into the 1890s. Between 1870 and 1891 the Yeke king Msiri fought neighbouring chiefs and traders, and in 1892 the Stairs Expedition killed him and claimed Katanga for Leopold II of Belgium.
Alfred Sharpe’s visit of 1890–1891 left behind the first colonial post in the valley, a British boma at Chiengi. Belgian Congo took the west bank and Northern Rhodesia the east, planting posts at Lukonzolwa and Pweto. Scottish missionary Dan Crawford opened the first mission on the lake in 1892 at Luanza, on the Belgian shore. When the British later moved their post from Chiengi to the Kalungwishi, the Belgians at Pweto gained a free hand, and a century on about 33 square kilometres of Zambian land beside Pweto passed to Zaire.
After 1900 Katanga’s western shore developed faster, and Kasenga on the Luapula remained the valley’s commercial hub into the 1960s, supplying fish to the Elizabethville mines. Since 1960, conflict and neglect on the Congolese side and peace on the Zambian side have reversed that balance, with Nchelenge, Kashikishi and Chiengi now the main Zambian towns.
Source: Lake Mweru
