The drainage basin of the Congo River
|• location||Boyoma Falls|
|Length||4,370 km (2,720 mi)|
|Basin size||4,014,500 km2 (1,550,000 sq mi)|
|• average||41,200 m3/s (1,450,000 cu ft/s)|
|• minimum||23,000 m3/s (810,000 cu ft/s)|
|• maximum||75,000 m3/s (2,600,000 cu ft/s)|
The Congo River (Kongo: Nzâdi Kôngo, French: Congo fleuve, Portuguese: Rio Congo), formerly also known as the Zaire River, is the second longest river in Africa, shorter only than the Nile, as well as the second largest river in the world by discharge volume, following only the Amazon. It is also the world's deepest recorded river, with measured depths in excess of 220 m (720 ft). The Congo-Lualaba-Chambeshi River system has an overall length of 4,700 km (2,920 mi), which makes it the world's ninth-longest river. The Chambeshi is a tributary of the Lualaba River, and Lualaba is the name of the Congo River upstream of Boyoma Falls, extending for 1,800 km (1,120 mi).
Measured along with the Lualaba, the main tributary, the Congo River has a total length of 4,370 km (2,715 mi). It is the only major river to cross the equator twice. The Congo Basin has a total area of about 4,000,000 km2 (1,500,000 sq mi), or 13% of the entire African landmass.
The name Congo/Kongo river originates from the Kingdom of Kongo once located on the southern bank of the river. The kingdom in turn was named for the indigenous Bantu Kongo people, known in the 17th century as "Esikongo". South of the Ki"Manicongo" the city at the mouth of the river.
The tribal names in Kongo possibly derive from a word for a public gathering or tribal assembly. The modern name of the Kongo people or Bakongo was introduced in the early 20th century.
The name Zaire is from a Portuguese adaptation of a Kikongo word, nzere ("river"), a truncation of nzadi o nzere ("river swallowing rivers"). The river was known as Zaire during the 16th and 17th centuries; Congo seems to have replaced Zaire gradually in English usage during the 18th century, and Congo is the preferred English name in 19th-century literature, although references to Zahir or Zaire as the name used by the inhabitants remained common.
The Democratic Republic of the Congo and the Republic of the Congo are named after it, as was the previous Republic of the Congo which had gained independence in 1960 from the Belgian Congo. The Republic of Zaire during 1971–1997 was also named after the river's name in French and Portuguese.
Basin and course
The Congo's drainage basin covers 4,014,500 square kilometres (1,550,000 sq mi), an area larger than India. The Congo's discharge at its mouth ranges from 23,000 to 75,000 cubic metres per second (810,000 to 2,650,000 cu ft/s), with an average of 41,000 cubic metres per second (1,400,000 cu ft/s).
The river and its tributaries flow through the Congo Rainforest, the second largest rain forest area in the world, second only to the Amazon Rainforest in South America. The river also has the second-largest flow in the world, behind the Amazon; the second-largest drainage basin of any river, behind the Amazon; and is one of the deepest rivers in the world, at depths greater than 220 m (720 ft). Because its drainage basin includes areas both north and south of the equator, its flow is stable, as there is always at least one part of the river experiencing a rainy season.
The sources of the Congo are in the highlands and mountains of the East African Rift, as well as Lake Tanganyika and Lake Mweru, which feed the Lualaba River, which then becomes the Congo below Boyoma Falls. The Chambeshi River in Zambia is generally taken as the source of the Congo in line with the accepted practice worldwide of using the longest tributary, as with the Nile River.
The Congo flows generally toward the northwest from Kisangani just below the Boyoma falls, then gradually bends southwestwards, passing by Mbandaka, joining with the Ubangi River, and running into the Pool Malebo (Stanley Pool). Kinshasa (formerly Léopoldville) and Brazzaville are on opposite sides of the river at the Pool, where the river narrows and falls through a number of cataracts in deep canyons (collectively known as the Livingstone Falls), running by Matadi and Boma, and into the sea at the small town of Muanda.
The Congo River Basin is one of the distinct physiographic sections of the larger Mid-African province, which in turn is part of the larger African massive physiographic division.
Lower Congo constitutes the 'lower' parts of the great river; that is the section of the river from the river mouth at the Atlantic coast to the twin capitals of Brazzaville in the Republic of the Congo and Kinshasa in the DR Congo.
In this section of the river there are two significant tributaries to the great Congo River, both on the left or south side. The Kwilu River originates in the hills near the Angolan border and enters the Congo some 100 km upstream from Matadi. The other being the Inkisi River, that flows in a northerly direction from the Uíge Province in Angola to the confluence with the Congo at Zongo some 80 km downstream from the twin capitals.
Tributaries to the Congo river
Downstream of Kinshasa, from the river mouth at Banana, there are a few major tributaries, all on the left side.
- Kwa-Kassai (left) – 2150 km – 881,900 km2, 9,900 m3/s
- Lefini (right)
- Sangha (right) – 1,400 km, 213,400 km2, 2,471 m3/s
- Ubangi/ (right) – 2,270 km, 772,800 km2, 4,000 m3/s
- Tshuapa or Ruki River (left) – 1,000 km
- Itimbiri River
Lomami River (left) – 1,400 km
- Upper Congo (Upstream from the Boyoma Falls)
Although the Livingstone Falls prevent access from the sea, nearly the entire Congo above them is readily navigable in sections, especially between Kinshasa and Kisangani. Large river steamers worked the river until quite recently.[when?] The Congo River still is a lifeline in a land with few roads or railways.
Railways now bypass the three major falls, and much of the trade of Central Africa passes along the river, including copper, palm oil (as kernels), sugar, coffee, and cotton. The river is also potentially valuable for hydroelectric power, and the Inga Dams below Pool Malebo are first to exploit the Congo river.
The Congo River is the most powerful river in Africa. During the rainy season over 50,000 cubic metres (1,800,000 cu ft) of water per second flow into the Atlantic Ocean. Opportunities for the Congo River and its tributaries to generate hydropower are therefore enormous. Scientists have calculated that the entire Congo Basin accounts for 13 percent of global hydropower potential. This would provide sufficient power for all of sub-Saharan Africa's electricity needs.
Currently there are about forty hydropower plants in the Congo Basin. The largest are the Inga dams, about 200 kilometres (120 mi) southwest of Kinshasa. The project was launched in the early 1970s, when the first dam was completed. The plan (as originally conceived) called for the construction of five dams that would have had a total generating capacity of 34,500 megawatts. To date only the Inga I and Inga II dams have been built, generating 1,776 MW.
In February 2005, South Africa's state-owned power company, Eskom, announced a proposal to expand generation through improvements and the construction of a new hydroelectric dam. The project would bring the maximum output of the facility to 40 gigawatts (54,000,000 hp), twice that of China's Three Gorges Dam.
The current course of the Congo River formed between 1.5 and 2 million years BP, during the Pleistocene. It is likely that during this period many upper tributaries of the Congo were captured from adjacent river basins, including the Uele and upper Ubangi from the Chari system and the Chambeshi River alongside a number of upper Kasai River tributaries from the Zambezi system.
The Congo's formation may have led to the allopatric speciation of the bonobo and the common chimpanzee from their most recent common ancestor. The bonobo is endemic to the humid forests in the region, as are other iconic species like the Allen's swamp monkey, dryas monkey, aquatic genet, okapi, and Congo peafowl.
In terms of aquatic life, the Congo River Basin has a very high species richness, and among the highest known concentrations of endemics. As of 2009[update], almost 800 fish species have been recorded from the Congo River Basin (not counting Lake Tanganyika, which is connected but ecologically very different), and large sections remain virtually unstudied. For example, the section in Salonga National Park, which is about the size of Belgium, had still not been sampled at all in 2006. New fish species are scientifically described with some regularity from the Congo River Basin and many undescribed species are known. The Congo has by far the highest diversity of any African river system; in comparison, the next richest are the Niger, Volta and Nile with about 240, 140 and 130 fish species, respectively. Due to this and the great ecological differences between the regions in the Congo basin —including habitats such as river rapids, deep rivers, streams, swamps and lakes— it is often divided into multiple ecoregions (instead of treating it as a single ecoregion). Among these ecoregions, the Lower Congo Rapids alone has more than 300 fish species, including approximately 80 endemics while the southwestern part (Kasai Basin) alone has more than 200 fish species, of which about a quarter are endemic. The dominant fish families – at least in parts of the river – are Cyprinidae (carp/cyprinids, such as Labeo simpsoni), Mormyridae (elephantfishes), Alestidae (African tetras), Mochokidae (squeaker catfishes), and Cichlidae (cichlids). Among the natives in the river is the huge, highly carnivorous giant tigerfish. Three of the more unusual endemics are the whitish (non-pigmented) and blind Lamprologus lethops, which is believed to live as deep as 160 metres (520 ft) below the surface, Heterochromis multidens, which is more closely related to cichlids of the Americas than other African cichlids, and Caecobarbus geertsii, the only known cavefish in Central Africa. There are also numerous endemic frogs and snails. Several hydroelectric dams are planned on the river, and these may lead to the extinction of many of the endemics.
The entire Congo basin is populated by Bantu peoples, divided into several hundred ethnic groups (see ethnic groups of the Democratic Republic of the Congo). Bantu expansion is estimated to have reached the Middle Congo by about 500 BC, and the Upper Congo by the first century AD. Remnants of the aboriginal population displaced by the Bantu migration, Pygmies/Abatwa of the Ubangian phylum, remain in the remote forest areas of the Congo basin.
The Kingdom of Kongo was formed around 1400 from a merging of the kingdoms of Mpemba Kasi & Mbata Kingdom on the left banks of the lower Congo River. Its territorial control along the river remained limited to what corresponds to the modern Bas-Congo province. European exploration of the Congo begins in 1482, when Portuguese explorer Diogo Cão discovered the river estuary (likely in August 1482), which he marked by a Padrão, or stone pillar (still existing, but only in fragments) erected on Shark Point. Cão also sailed up the river for a short distance, establishing contact with the Kingdom of Congo. The full course of the river remained unknown throughout the early modern period.
The upper Congo basin runs west of the Albertine Rift. Its connection to the Congo was unknown until 1877. The extreme northeast of the Congo basin was reached by the Nilotic expansion at some point between the 15th and 18th centuries, by the ancestors of the Southern Luo speaking Alur people. Francisco de Lacerda following the Zambezi reached the uppermost part of the Congo basin (the Kazembe in the upper Luapula basin) in 1796.
The upper Congo River, known as the Lualaba was first reached by the Arab slave trade by the 19th century. Nyangwe was founded as a slavers' outpost around 1860. David Livingstone was the first European to reach Nyangwe in March 1871. Livingstone proposed to prove that the Lualaba connected to the Nile, but on 15 July, he witnessed a massacre of about 400 Africans by Arab slavers in Nyangwe, which experience left him too horrified and shattered to continue his mission to find the sources of the Nile, so he turned back to Lake Tanganyika.
The middle reaches of the Congo remained unexplored from either the east or west, until Henry Morton Stanley's expedition of 1876–77. At the time one of the last open questions of the exploration of Africa (or indeed of the world) whether the Lualaba River fed the Nile (Livingstone's theory), the Congo or even the Niger. Financed in 1874, Stanley's first trans-Africa exploration started in Zanzibar, and reached the Lualaba on October 17, 1876. Overland he reached Nyangwe, the centre of a lawless area containing cannibal tribes at which Tippu Tip based his trade in slaves. Stanley managed to hire a force from Tippu Tip, to guard him for the next 150 kilometres (90 mi) or so, for 90 days. The party left Nyangwe overland through the dense Matimba forest. On November 19 they reached the Lualaba again. Since the going through the forest was so heavy, Tippu Tip turned around with his party on December 28, leaving Stanley on his own, with 143 people, including 8 children and 16 women. They had 23 canoes. His first encounter with a local tribe was with the cannibal Wenya. In total Stanley would report 32 unfriendly meetings on the river, some violent, even though he attempted to negotiate a peaceful thoroughfare. But the tribes were wary as their only experience of outsiders was of slave traders.
On January 6, 1877, after 640 kilometres (400 mi), they reached Boyoma Falls (called Stanley Falls for some time after), consisting of seven cataracts spanning 100 kilometres (60 mi) which they had to bypass overland. It took them to February 7 to reach the end of the falls. Here Stanley learned that the river was called Ikuta Yacongo, proving to him that he had reached the Congo, and that the Lualaba did not feed the Nile.
From this point, the tribes were no longer cannibals[clarification needed], but possessed firearms, apparently as a result of Portuguese influence. Some four weeks and 1,900 kilometres (1,200 mi) later he reached Stanley Pool (now Pool Malebo), the site of the present day cities Kinshasa and Brazzaville. Further downstream were the Livingstone Falls, misnamed as Livingstone had never been on the Congo: a series of 32 falls and rapids with a fall of 270 metres (900 ft) over 350 kilometres (220 mi). On 15 March they started the descent of the falls, which took five months and cost numerous lives. From the Isangile Falls, five falls from the foot, they beached the canoes and Lady Alice and left the river, aiming for the Portuguese outpost of Boma via land. On August 3 they reached the hamlet Nsada. From there Stanley sent four men with letters forward to Boma, asking for food for his starving people. On August 7 relief came, being sent by representatives from the Liverpool trading firm Hatton & Cookson. On August 9 they reached Boma, 1,001 days since leaving Zanzibar on November 12, 1874. The party then consisted of 108 people, including three children born during the trip. Most probably (Stanley's own publications give inconsistent figures), he lost 132 people through disease, hunger, drowning, killing and desertion.
The Congo river basin is notable for the lack of bridges crossing the main rivers, although there are a number of ferries available for crossing the Congo river and the major tributaries. The main reasoning is the mere width of the Congo river and main rivers, and the second is the lack of funds to set up permanent river crossings.
Bridges on the Congo proper and Lualaba
- The Matadi Bridge, 148 km from the rivermouth, at the port of Matadi in the Kongo Central province.
- The Kongolo Bridge on the Lualaba River, some 3,900 km along the tributary from the rivermouth, near the town Kongolo, in the eastern province Katanga.
Bridges on the Uele and Kibali rivers
- The Niangara Bridge on the Uele, some 2,000 km along the tributary from the rivermouth, near the town Niangara.
- The Dungu Bridge on the Kibali, some 2,050 km along the tributary from the rivermouth, near the town Dungu, at the confluence of Dungu and Kibali rivers, where the Uele river is formed.
- The Kalimva Bridge on the Kibali, some 2,250 km along the tributary from the rivermouth, near the town Kalimva.
Bridges on the Lulua river
- Between the towns of Luebo and Tshimpumpu.
- Near the town of Kananga.
- At the town of Sanduwa.
- West of the town of Diongo (also the location of a railway bridge on the Benguela Railway).
Bridges on the Kwango river
- At the town of Cité Pont-Kwango.
Ferries in the Congo Basin
Ferries on the Congo proper
- Kinshasa - Brazzaville, the ferry between the twin capitals - the most busy international ferry connection within Africa.
- Near Isangi, some 1250 km from the mouth.
- At Kisangani, some 1500 km from the mouth.
- At Ubundu, some 1700 km from the mouth
Ferries on the Kasai River and tributaries
- At Bendela on the Kasai River.
- At Bandundu on the Kwilu River.
- South of Bandundu on the Kwilu River.
- At Loange on the Loange River.
Ferry on the Ubangi river
Ferry on the Mbomou river
Ferries on the Lulua river
- Near the township of Tshinkenke, in the province of Kasai in DR Congo.
- Near the township of Mpungu, in the province of Kasai in DR Congo.
Ferries on the Uele river
On the minor tributaries of the Congo there are numerous river crossings.
- Hydrology transport model
- Portage railway
- Congo Basin
- Congo river steamers
- Nile River
- Lake Chad replenishment project
- Bossche, J.P. vanden; G. M. Bernacsek (1990). Source Book for the Inland Fishery Resources of Africa, Volume 1. Food and Agriculture Organization of the United Nations. pp. 338–339. ISBN 978-92-5-102983-1. Archived from the original on 2016-04-25. Retrieved 2015-12-27.
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- Forbath, Peter. The River Congo (1979), p. 6. "Not until it crosses the equator will it at last turn away from this misleading course and, describing a remarkable counter-clockwise arc first to the west and then to the southwest, flow back across the equator and on down to the Atlantic.
In this the Congo is exceptional. No other major river in the world crosses the equator even once, let alone twice."
- Anderson, David (2000). Africa's Urban Past. p. 79. ISBN 9780852557617. Archived from the original on 2017-12-22. Retrieved 2017-05-04.
- Manikongo was properly the title of the kings of Kongo; their capital was at the site of modern M'banza-Kongo, capital of Angola's northwestern Zaire Province. Orteilus had no knowledge of the orography of Africa and drew fictitious courses for its rivers; his Congo upstream of its estuary turns sharply south, flowing through what would correspond to Angola and Botswana.
- Peter Forbath (1977). The River Congo. p. 19.
- James Barbot (1746). An Abstract of a Voyage to Congo River, Or the Zair and to Cabinde in the Year 1700. James Hingston Tuckey (1818). Narrative of an Expedition to Explore the River Zaire, Usually Called the Congo, in South Africa, in 1816. Archived from the original on 2018-05-21. Retrieved 2019-11-11. John Purdy (1822). Memoir, Descriptive and Explanatory, to Accompany the New Chart of the Ethiopic Or Southern Atlantic Ocean. p. 112.
Congo River, called Zahir or Zaire by the natives
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- The Dieppe maps of the mid-16th century show the Congo only as a minor river, while having the Nile run throughout the continent, rising in Southern Africa. The same interpretation is in essence still found in Jan Blaeu's Atlas Maior of 1660. Jacques Bellin's map of the Congo in Histoire Generale Des Voyages by Antoine François Prévost (1754) shows awareness of the river reaching further inland, to the provinces of Sundi and Pango, but has no detailed knowledge of its course.
- Livingstone, David (2012). Livingstone's 1871 Field Diary. A Multispectral Critical Edition. UCLA Digital Library: Los Angeles, CA. Available <http://livingstone.library.ucla.edu/1871diary/ Archived 2014-09-05 at the Wayback Machine>
- See also Jeal, Tim (1973). Livingstone. New Haven, CT: Yale University Press. Pp. 331-335.
- Jeal, 2007 pp. 188–219.
- Jeal, 2007 p. 199; February 7, 1877
- Jeal, 2007 p. 217. Stanley, Henry M. (1988). Through the Dark Continent. Dover Publications. pp. 432 pages. ISBN 978-0-486-25667-2.
- Brussels, Monument to Congo pionniers, 50th Jubileum Park.
- Forbath, Peter. The River Congo: The Discovery, Exploration and Exploitation of the World's Most Dramatic River. New York: E. P. Dutton, 1979. ISBN 0-525-47573-7
|Wikimedia Commons has media related to:|
- The Royal Geography Society's Hidden Journeys project:
- The River Congo Basin
- Audio slideshow: The River Congo: Following in Explorer Sir Henry Morton Stanley's Footsteps – Tim Butcher recounts his trip through the Congo on the route of 19th-century explorer Sir Henry Morgan Stanley.
- Bibliography on Water Resources and International Law Peace Palace Library
- Map of the Congo River basin at Water Resources eAtlas
- The Congo Project, American Museum of Natural History