The Lake Chad wetlands are the shallow freshwater lake, reed swamps, dune islands and flooded savannas that sit where Chad, Cameroon, Niger and Nigeria meet, at the low point of a closed basin of more than 1,000,000 km² in the Sahel. The lake has no outlet to the sea and is fed about 95% by the Chari and Logone rivers. Its open water shrank from about 25,000 km² in 1960 to about 2,000 km² by 1980 and has fluctuated between roughly 2,000 and 5,000 km² since, averaging about 1,876 km² over 2013–2016; it is no longer thought to be shrinking, though it remains vulnerable to climate change. It is an Important Bird Area, was declared a Transboundary Ramsar Site in July 2000, and is managed jointly through the Lake Chad Basin Commission, founded in 1964. Above all it is a working landscape: more than 30 million people live in the basin, belonging to more than 70 ethnic groups, and most of those around the lake fish, farm or herd on its changing shores.
The lake is divided by a shallow sill, the Great Barrier, into a deeper southern pool, where the Chari enters near N'Djamena, and a shallower northern pool that only fills when the south rises above about 279 m. The southern basin averages 0.5 to 2 m deep; to the east, partly drowned sand dunes form an archipelago. Each of those zones supports a different way of making a living.
Buduma island fishers and the Kuri cattle that swim
The islands and reed beds of the lake are the home of the Buduma, who live in Chad, Cameroon and Nigeria. Their neighbours' name for them means "people of the grass" or "of the reeds"; they prefer to be called Yedina, which is also the name of their language. Their tradition traces descent from the Sao civilization and the Kanem–Bornu Empire, but for centuries they kept apart on remote islands and the northern shores, protected by water and reeds.
The Buduma economy runs on two resources: fish and cattle. Many fish for their own households and some commercially, while papyrus reeds provide boats and lightweight huts that can be moved to higher ground when the lake rises. Their diet includes fish, cow's milk and flour ground from water lily roots, and they rarely slaughter their cattle. The animals themselves are the Kuri, a humpless longhorn breed found only around Lake Chad, weighing roughly 800 to 1,100 lb (360 to 500 kg). Kuri spend much of their time in the water and swim well; their swollen, hollow-looking horns are thought to help them float when herded between islands. They tolerate heat and drought poorly, and an attempt between 1953 and 1957 to establish a herd away from the lake failed. Interbreeding with zebu cattle has since reduced pure Kuri numbers.
The fishery they work is rich. The whole Chad basin has 179 fish species, 84 of them in the lake, and more than 40 are commercially important, among them Alestes baremoze and the Nile perch. Most of the catch is dried, salted or smoked for markets inland. Fishing was always the most important activity on the lake, but it almost stopped during the droughts of the 1970s and 1980s and only recovered in the mid-1990s. Dams upstream on the Chari, Logone and Yobe disrupted fish migration and sharply reduced catches of the two main species.
Kanembu merchants and the empire that began at Njimi
The northeastern shore has been a centre of power for more than a thousand years. Sometime between about 700 and 900 AD, Kanuri-speaking Kanem people united nomadic groups northeast of the lake and founded the Kanem Empire, with its capital at Njimi. Mai Dunama Dabbalemi of the Sayfawa dynasty, usually dated to 1221–1259, brought Kanem to its peak and extended its rule as far as the Fezzan. Around 1380 the Bilala captured Njimi, and the dynasty moved to Bornu on the lake's western side, where intermarriage gave rise to the Kanuri. The Bornu-based empire stayed a major regional power for centuries, until the warlord Rabih az-Zubayr conquered it in 1893; by 1902 its lands had been divided among France, Britain and Germany.
The Kanembu of the Lac Region of Chad, along with the neighbouring Chari-Baguirmi and Kanem areas, are generally considered the empire's modern descendants and number an estimated 1,815,270. They farm wheat, millet and maize near the lake and raise livestock, but they are best known as Chad's merchant community: an estimated 75 to 80% of all merchants in the country are Kanembu. Their traditional rulers often carry more local influence than government officials. One product the region has long traded comes from the lake itself: natron, dug in blocks from depressions on the northeast shore and carried across the water to Nigerian markets.
Polders on the old lakebed since the 1970s droughts
The shrinking of the lake changed farming as much as fishing. Major droughts struck the Sahel from the late 1960s, with severe years in 1972 and 1984. Between June 1966 and January 1973 the lake fell from 22,772 km² to 15,400 km², then to 4,398 km² in 1975 and only 1,756 km² in February 1994. At the same time, with dams and diversions multiplying upstream, the average inflow of the Chari and Logone between 1970 and 1990 was just 55% of the 1950–1970 level.
As the water withdrew, it exposed lakebed soil that could be planted without irrigation or fertiliser. Farmers enclosed it as polders and planted maize, cowpea, rice and sorghum, alongside the region's traditional crops of sorghum, finger millet, beans and gourds. The shift has costs: a move from dry crops towards water-hungry rice has worsened soil salinisation and eutrophication, and the losses to fishing, farming and herding are judged to outweigh the gains from new land. Herding was hit hard too. Cattle are the most important livestock, alongside poultry, goats, sheep, camels, horses and donkeys, and the droughts of the 1970s and 1980s devastated herds. Gathering gum arabic, honey, beeswax and firewood also matters, but shrinking woodland has cut those yields.
N'Djamena, Maiduguri and Bol: the cities on the lake's edge
The lake's largest market lies on its southern river. N'Djamena, Chad's capital, was founded by the French in 1900 as Fort-Lamy, named after the commander killed at the Battle of Kousséri that April, and renamed on 6 April 1973. It stands where the Logone joins the Chari, facing the Cameroonian town of Kousséri across the water, and processes meat, fish and cotton and trades livestock, salt, dates and grain. Much of its growth has come from people seeking safety there during Chad's conflicts, though fighting in 1979–80 also emptied the city for a time.
On the Nigerian side, Maiduguri, capital of Borno State, grew from the Bornu capital and British military post set up there in 1907–08 into a metropolitan area of about two million people by 2022; its seasonal Ngadda River disappears into the firki swamps towards the lake. Bol, 152 km north of N'Djamena, is the capital of Chad's Lac Region and once stood on the open shore.
Smaller lakeside towns were built around the fish trade. Baga, in Nigeria's Kukawa area about 196 km from Maiduguri, was a fishing centre in the 1960s and 1970s, with the Doron Baga fish market nearby; as the shoreline retreated, many fishermen moved after the water and others turned to subsistence farming.
Baga in 2015 and the insurgency's toll on lakeshore livelihoods
Since 2009 the Boko Haram insurgency, and later the Islamic State West Africa Province, has disrupted life around the lake and displaced millions of people across the region. In January 2015 militants seized Baga and the nearby base of the Multinational Joint Task Force. Satellite images released by Amnesty International showed about 620 structures damaged or destroyed in Baga and more than 3,100 in Doron Baga, and some residents escaped to Chad by swimming across the lake. Death toll estimates range widely, from about 150 according to Nigeria's defence ministry to as many as 2,000 in other reports. Several sources describe Baga as under insurgent control since December 2018.
For lakeside households, the conflict compounds the older pressures of drought, water loss and competition for land, and extreme poverty has drawn some residents into the drug and arms trade. The task force, headquartered in N'Djamena, now draws troops from Benin, Cameroon, Chad and Nigeria; Niger withdrew in 2025.
The 1964 Fort-Lamy Convention and the plan to refill the lake
The four lakeside states signed the Fort-Lamy Convention on 22 May 1964, creating the Lake Chad Basin Commission, Africa's oldest river or lake basin organisation; the Central African Republic joined in 1996 and Libya in 2008. Its secretariat is in N'Djamena, and its roughly US$1 million annual budget is split by formula, with Nigeria paying 52% and Cameroon 26%. Its most ambitious idea is the transfer of water from the Congo basin, first proposed in 1929. A 2011 feasibility study by the Canadian firm CIMA costed a pumped transfer from the Ubangi at about US$10 billion, but in 2018 the commission instead adopted Transaqua, a far larger plan for a 2,400 km navigable canal fed by dams on the Congo's northern tributaries. Congo-basin states have raised concerns over hydropower at Inga, navigation and fish catches. For now the lake's people depend on the rains of the Adamawa Plateau, which set how far the water will reach each year. The wider physical setting is covered in our Lake Chad geography guide, and the climate belt that drives its floods is explained in our article on the Sahel region.