Lake Kariba
World's largest man-made reservoir by volume.
Lake Kariba, the largest man-made lake in the world by volume, straddles the border between Zambia and Zimbabwe. It sits 1,300 kilometers up the Zambezi River from the Indian Ocean. The lake was created when the Kariba Dam was finished at its northeastern end, flooding the Kariba Gorge between 1958 and 1963. The Zimbabwean town of Kariba was originally built to house dam construction workers, while other communities—Binga and Mlibizi in Zimbabwe, and Siavonga and Sinazongwe in Zambia—grew as they absorbed people displaced by the rising waters.
Stretching more than 223 kilometers in length and up to 40 kilometers wide, the lake covers 5,580 square kilometers. Its average depth is 29 meters, with a maximum of 97 meters, and it holds 185 cubic kilometers of water—four times the volume of the reservoir behind the Three Gorges Dam. The government of the Federation of Rhodesia and Nyasaland ordered its construction. The immense weight of the water has triggered induced seismicity in this already active seismic zone, including over 20 earthquakes above magnitude 5. The lake contains numerous islands, among them Maaze, Mashape, Chete, Sekula, Sampa Karuma, Fothergill, Spurwing, Snake, Antelope, Bed, and Chikanka.
During the filling phase, decomposing flooded vegetation released nutrients into the water, creating a fertile layer on the future lake bed. This sparked a rich ecology. The sardine-like kapenta, introduced from Lake Tanganyika, now supports a thriving commercial fishery. Nile crocodiles and hippopotamuses also inhabit the lake. Indigenous tigerfish, a popular gamefish, feed on the kapenta, boosting tourism. Both Zambia and Zimbabwe are working to develop their shorelines for visitors. Fish eagles, cormorants, and other water birds patrol the edges, alongside large herds of elephants and other big game—lion, cheetah, leopard, buffalo, and many smaller plains species. The southern Matusadona National Park once sheltered black and white rhinoceros, but heavy poaching has drastically cut their numbers.
The Zimbabwean portion of Lake Kariba is designated a recreational park within the country’s Parks and Wildlife Estate.
- type
- Artificial lake and reservoir
- location
- Zambezi River, bordering Zambia and Zimbabwe
- length
- Over 223 km (139 mi)
- width
- Up to 40 km (25 mi)
- surface_area
- 5,580 km² (2,150 sq mi)
- storage_capacity
- 185 km³ (44 cu mi)
- maximum_depth
- 97 m (318 ft)
Verified Timeline
Lore & Background
Lake Kariba was filled between 1958 and 1963 after the Kariba Dam was completed at its northeastern end, flooding the Kariba Gorge on the Zambezi River. The dam was built on the orders of the government of the Federation of Rhodesia and Nyasaland. The Zimbabwean town of Kariba was built for construction workers, while other settlements like Binga village and Mlibizi in Zimbabwe and Siavonga and Sinazongwe in Zambia expanded to house displaced people. The lake is over 223 km long and up to 40 km wide, covering an area of 5,580 km². Its storage capacity is 185 km³, with a mean depth of 29 m and a maximum depth of 97 m. It is the world's largest man-made reservoir by volume, four times as large as that created by the Three Gorges Dam. The enormous mass of water is believed to have caused induced seismicity, including over 20 earthquakes of greater than 5 magnitude on the Richter scale. The lake has several islands, including Maaze Island, Mashape Island, Chete Island, Sekula, Sampa Karuma, Fothergill, Spurwing, Snake Island, Antelope Island, Bed Island, and Chikanka. During the filling phase, decomposing vegetation created nutrient-rich water, fostering a vibrant ecology. The sardine-like kapenta was introduced from Lake Tanganyika and now supports a thriving commercial fishery. Other inhabitants include Nile crocodiles and hippopotamuses. Indigenous tigerfish thrive on the kapenta, encouraging tourism. Both Zambia and Zimbabwe are attempting to develop tourism along their respective shores. Wildlife includes fish eagles, cormorants, elephants, lion, cheetah, leopard, buffalo, and smaller plains game. The southern Matusadona National Park was once a haven for black and white rhinoceros, but recent poaching has dramatically reduced their numbers.
Reader's Guide
Lake Kariba is the world's largest artificial lake and reservoir by volume, four times as large as that created by the Three Gorges Dam. It lies 1,300 kilometres upstream from the mouth of the Zambezi River on the Indian Ocean, bordering Zambia and Zimbabwe. The lake was created between 1958 and 1963 after the Kariba Dam was completed, flooding the Kariba Gorge. Its creation displaced communities, leading to the expansion of towns like Binga, Mlibizi, Siavonga, and Sinazongwe. The lake's ecology supports a commercial fishery based on introduced kapenta from Lake Tanganyika, and gamefish like tigerfish attract tourism. The lake's mass has induced seismic activity, including over 20 earthquakes greater than magnitude 5. On 11 August 2026, the ferry Mbuya Nehanda running from Kariba to Chalala capsized, resulting in the death of at least 97 people, including 18 children. It is believed to be one of the deadliest boat disasters in Zimbabwe's history. The portion of Lake Kariba within Zimbabwe has been designated a recreational park within the Zimbabwe Parks and Wildlife Estate.
Did You Know?
- Lake Kariba is the world's largest artificial lake and reservoir by volume, four times as large as that created by the Three Gorges Dam.
- The lake was filled between 1958 and 1963 after the completion of the Kariba Dam, flooding the Kariba Gorge on the Zambezi River.
- The enormous mass of water is believed to have caused induced seismicity, including over 20 earthquakes of greater than 5 magnitude on the Richter scale.
- On 11 August 2026, the ferry Mbuya Nehanda capsized, killing at least 97 people, including 18 children, in one of Zimbabwe's deadliest boat disasters.
- The sardine-like kapenta was introduced from Lake Tanganyika and now supports a thriving commercial fishery.
Frequently Asked Questions
What is Lake Kariba?
Lake Kariba is a massive artificial reservoir formed on the Zambezi River where the borders of Zambia and Zimbabwe meet. It holds the distinction of being the largest man-made lake in the world when measured by water volume.
How was Lake Kariba created?
The lake came into existence between 1958 and 1963 once the Kariba Dam was finished and began holding back the Zambezi. The rising waters flooded the Kariba Gorge, swallowing the old river channel and creating the vast reservoir we see today.
How big is Lake Kariba?
Stretching more than 223 kilometres in length and reaching up to 40 kilometres wide at its broadest point, the lake covers roughly 5,580 square kilometres of surface. Its storage capacity tops out at about 185 cubic kilometres, which is what makes it the volume leader among artificial lakes globally.
Why is Lake Kariba important?
Beyond its sheer scale, the reservoir supports a rich aquatic ecosystem and serves as a critical source of hydroelectric power for both Zambia and Zimbabwe. Its position on the shared Zambezi border also makes it a landmark of cooperation between the two nations.
What is the 2026 ferry disaster at Lake Kariba?
In 2026, a ferry operating on the lake suffered a fatal accident that claimed multiple lives, drawing wide international attention. The tragedy highlighted ongoing safety concerns for water transport on the reservoir.
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