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{{Short description|River in central Africa}}{{Other uses}}

factoids

;Congo–Lualaba {{cvt|4,374|km|mi|abbr=on}}JOURNAL, The Wetland Book,weblink Congo River Basin, 10.1007/978-94-007-6173-5_92-2, Ian James, Harrison, Randall E., Brummett, Melanie L. J., Stiassny, 1-18, 2016, 2001,440|m}} (Middle Congo)| width_avg = 19,000|m}} (mouth)| depth_min = 1275522|m}} (Middle Congo)220ft50|m}} (Middle Congo)| discharge1_location= Atlantic Ocean (near mouth)23,000cuft/s}}41,200cuft/s}}75,000cuft/s}}Kinshasa, Brazzaville (498 km upstream of mouth; Basin size: {{cvt>3,659,900|km2}}22,000cuft/s}} (1905)40,500cuft/s}}77,000cuft/s}} (1961)Kisangani (2,240 km upstream of mouth; Basin size: {{cvt>974,330|km2}}3,240cuft/s}}7,640cuft/s}}13,930cuft/s}}Kindu (2,705 km upstream of mouth; Basin size: {{cvt>810,440|km2}}640cuft/s}}2,213cuft/s}}7,640cuft/s}}Bukama (3,695 km upstream of mouth; Basin size: {{cvt>63,090|km2}}52cuft/s}}322cuft/s}}1,229cuft/s}}| source1 = Boyoma Falls| source1_location = Kisangani033.77762524.8688|E}}373abbr=on}}Lualaba River>Lualaba| source2_location =Katanga Plateau1152.62122610.062|E}}1,420abbr=on}}Chambeshi River>Chambeshi| source3_location =922.8243120.898|E}}1,760abbr=on}}| mouth = Atlantic Ocean| mouth_location = 06301200type:river|display=inline,title}}0abbr=on}}| progression = | river_system = Congo River4,014,500|km2}}Lubudi River (Lualaba tributary)>Lubudi, Lomami River, Lulonga River>Lulonga, Ikelemba River, Ruki River>Ruki, Kasai River, Inkisi River>InkisiLufira River>Lufira, Luvua River, Lukuga River>Lukuga, Luama River, Elila River>Elila, Ulindi River, Lowa (Kivu/Maniema)>Lowa, Maiko, Lindi River, Aruwimi River>Aruwimi, Itimbiri River, Mongala River>Mongala, Ubangi River, Sangha River>Sangha, Likouala-Mossaka, Alima River>Alima, Léfini| custom_label = | custom_data = | extra = }}The Congo River (, , , ), formerly also known as the Zaire River, is the second-longest river in Africa, shorter only than the Nile, as well as the third-largest river in the world by discharge volume, following the Amazon and Ganges rivers. It is the world's deepest recorded river, with measured depths of around {{cvt|220|m|ft}}.WEB, Discharge and Other Hydraulic Measurements for Characterizing the Hydraulics of Lower Congo River, July 2008, Kevin, Oberg, July 2008, U.S. Geological Survey,weblink 2012-03-14,weblink" title="web.archive.org/web/20111015143546weblink">weblink 2011-10-15, live, The Congo–Lualaba–Luvua–Luapula–Chambeshi River system has an overall length of {{cvt|4,700|km|mi|abbr=on}}, 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 {{cvt|1,800|km|mi|abbr=on}}.Measured along with the Lualaba, the main tributary, the Congo River has a total length of {{cvt|4,370|km|mi|abbr=on}}. It is the only major river to cross the Equator twice.{{harvnb|Forbath|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." The Congo Basin has a total area of about {{cvt|4,000,000|km2|mi2}}, or 13% of the entire African landmass.

Name

The name Congo/Kongo originates from the Kingdom of Kongo once located on the southern bank of the river. The kingdom in turn was named after the indigenous Bantu Kongo people, known in the 17th century as "Esikongo".BOOK, Africa's Urban Past, David, Anderson, 2000, 9780852557617,weblink 79, James Currey Publishers, 2017-05-04,weblink 2017-12-22, live, South of the Kingdom of Kongo proper lay the similarly named Kakongo kingdom, mentioned in 1535. Abraham Ortelius labelled "Manicongo" as the city at the mouth of the river in his world map of 1564.{{efn|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. Ortelius 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.}} 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.{{citation needed|date=May 2017}}The name Zaire is from a Portuguese adaptation of a Kikongo word, ("river"), a truncation of ("river swallowing rivers").{{sfn|Forbath|1979|p=19}} 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.BOOK, James Barbot, An Abstract of a Voyage to Congo River, Or the Zair and to Cabinde in the Year 1700, 1746, {{*}}BOOK, James Hingston Tuckey, 1818, Narrative of an Expedition to Explore the River Zaire, Usually Called the Congo, in South Africa, in 1816,weblink 2019-11-11,weblink 2018-05-21, live, {{*}}BOOK, Congo River, called Zahir or Zaire by the natives, John Purdy, Memoir, Descriptive and Explanatory, to Accompany the New Chart of the Ethiopic Or Southern Atlantic Ocean, 1822, 112, 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

File:Congo River with upstream half of Pool Malebo and Mbamu.jpg|thumb|Aerial view from the west of the Congo River with upstream half of Pool Malebo and MbamuMbamuThe Congo's drainage basin covers {{cvt|4,014,500|km2|mi2|abbr=on}}, an area nearly equal to that of the European Union. The Congo's discharge at its mouth ranges from {{cvt|23,000|to|75,000|m3/s|sp=us}}, with an average of {{cvt|41,000|m3/s|sp=us}}. The river transports annually 86 million tonnes of suspended sediment to the Atlantic Ocean and an additional 6% of bedload.JOURNAL, Hanibal Lemma, and colleagues, Bedload transport measurements in the Gilgel Abay River, Lake Tana Basin, Ethiopia (Table 7), Journal of Hydrology, 2019, 577, 123968, 199099061, 10.1016/j.jhydrol.2019.123968, The river and its tributaries flow through the Congo rainforest, the second largest rainforest area in the world, after 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 {{cvt|220|m|ft}}.WEB, Monster Fish of the Congo, National Geographic Channel, 2009,weblink dead,weblink" title="web.archive.org/web/20101206040928weblink">weblink 2010-12-06, 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 Congo River {{Webarchive |url=https://web.archive.org/web/20171020093113weblink |date=2017-10-20 }}. Rainforests.mongabay.com. Retrieved on 2011-11-29.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 southwestward, 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 Muanda.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 and Kinshasa. In this section of the river, there are two significant tributaries, 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 is 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. Because of the vast number of rapids, in particular the Livingstone Falls, this section of the river is not operated continuously by riverboats.

Drainage basin

The Congo basin covers ten countries and accounts for about 13% of Africa. The highest point in the Congo basin is in the Ruwenzori Mountains, at an altitude of around {{cvt|4,340|m}} above sea level.Distribution of the Congo basin area between countries:WEB,weblink Congo-HYCOS, 2023-04-15, 2023-04-19,weblink live, {| class="wikitable" style="text-align:center;"!Country!Area(km2)!(%)Angola {{flagicon>Angola}}|305,760|8.2Burundi {{flagicon>Burundi}}|18,728|0.51Cameroon {{flagicon>Cameroon}}|85,300|2.3Central African Republic {{flagicon>Central African Republic}}|402,000|10.8Democratic Republic of the Congo {{flagicon>Democratic Republic of the Congo}}|2,307,800|62.15Gabon {{flagicon>Gabon}}|1,146|0.03Republic of the Congo {{flagicon>Republic of the Congo}}|248,400|6.7Rwanda {{flagicon>Rwanda}}|382|0.01Tanzania {{flagicon>Tanzania}}|166,800|4.5Zambia {{flagicon>Zambia}}|176,600|4.8|For the Congo basin|3,712,316|100.0The most important hydrological stations along the Congo River are:{| class="wikitable" style="text-align:center;"! rowspan="2" |Station! rowspan="2" |Riverkilometer(rkm)! rowspan="2" |Altitude(m)! rowspan="2" |Basin size(km2)! colspan="2" |Multiannualaveragedischarge!Startyear!(m3/s)Lower CongoBanana, Democratic Republic of the Congo>Banana|0|0|3,730,740|1915|41,400Inga dams>Inga|188|78||1959|41,100|Kinshasa,Brazzaville|498|269|3,659,900|1902|40,500Middle Congo|Mossaka|898|289|2,490,000|||Mbandaka|1,157|303|1,683,800|1907|19,000|Yangambi|2,133|371|1,069,100|1907|8,358|Kisangani|2,240|380|974,330|1907|7,079Upper Congo(Lualaba)|Boyoma Falls|2,310|400||1907|6,550|Ubundu|2,390|418||1907|6,378|Kindu|2,705|448|810,440|1912|2,213|Ankoro|3,455|556|171,000|1935|901|Bukama|3,695|567|63,090|1933|322

Discharge

The Congo River discharge at Kinshasa/Brazzaville stations since the start of measurements (1902 to 2021):{| class="wikitable" style="text-align:center;"! rowspan="2" |Wateryear! colspan="3" |Discharge (m3/s)! rowspan="2" |Wateryear! colspan="3" |Discharge (m3/s)! rowspan="2" |Wateryear! colspan="3" |Discharge (m3/s)!Min!Mean!Max!Min!Mean!Max!Min!Mean!Max|1902/03|30,850|38,670|51,020|1942/43|31,190|42,150|55,200|1982/83|24,360|35,560|49,020|1903/04|28,700|40,680|53,850|1943/44|27,090|39,360|50,270|1983/84|24,000|33,310|51,700|1904/05|22,350|34,710|49,960|1944/45|30,960|38,890|56,250|1984/85|27,000|38,810|51,300|1905/06|27,280|38,820|48,310|1945/46|28,120|38,820|61,300|1985/86|24,200|36,740|55,400|1906/07|23,980|34,190|45,680|1946/47|34,900|43,470|50,350|1986/87|24,900|38,700|60,400|1907/08|28,350|38,950|65,760|1947/48|33,560|44,210|62,740|1987/88|25,700|39,110|57,300|1908/09|35,460|45,330|54,350|1948/49|29,080|39,610|53,960|1988/89|25,600|37,830|62,800|1909/10|29,960|41,920|60,160|1949/50|29,480|42,140|56,940|1989/90|24,300|35,970|55,800|1910/11|26,080|38,220|55,440|1950/51|28,150|39,614|62,780|1990/91|33,600|40,880|54,100|1911/12|30,930|40,240|53,260|1951/52|31,900|40,360|55,020|1991/92|24,000|34,640|49,100|1912/13|27,730|36,380|42,280|1952/53|25,850|37,100|49,370|1992/93|27,100|36,790|58,100|1913/14|26,280|35,860|56,810|1953/54|27,690|37,870|51,450|1993/94|30,100|38,730|53,000|1914/15|25,220|34,090|47,450|1954/55|32,220|44,130|60,790|1994/95|28,500|39,970|65,400|1915/16|27,760|38,500|59,680|1955/56|30,490|42,420|55,490|1995/96|29,500|40,860|58,900|1916/17|29,270|42,200|55,920|1956/57|32,840|42,300|54,520|1996/97|28,400|38,370|57,600|1917/18|27,440|34,850|43,840|1957/58|26,010|35,330|50,870|1997/98|32,100|45,000|71,000|1918/19|23,740|33,650|44,630|1958/59|25,440|36,500|57,720|1998/99|31,100|41,230|62,200|1919/20|27,230|37,880|59,540|1959/60|35,380|46,450|59,540|1999/00|28,700|40,120|69,300|1920/21|30,590|40,940|55,850|1960/61|35,060|47,410|80,830|2000/01|33,900|42,960|55,800|1921/22|25,830|37,980|58,140|1961/62|40,420|55,240|76,300|2001/02|29,600|43,070|66,800|1922/23|29,540|41,080|59,870|1962/63|39,630|51,230|67,950|2002/03|33,600|43,120|64,800|1923/24|30,610|42,620|63,370|1963/64|32,930|48,510|69,410|2003/04|25,800|38,150|56,700|1924/25|32,180|41,330|64,170|1964/65|28,370|43,100|62,350|2004/05|25,600|37,640|57,500|1925/26|31,770|43,920|61,660|1965/66|36,670|48,380|63,040|2005/06|26,800|38,090|53,100|1926/27|27,000|37,710|47,350|1966/67|31,420|41,770|65,540|2006/07|31,900|42,160|63,900|1927/28|31,430|41,120|51,730|1967/68|36,970|46,960|58,560|2007/08|30,700|41,590|62,000|1928/29|29,080|39,280|57,930|1968/69|43,170|51,830|66,420|2008/09|29,900|41,160|56,800|1929/30|27,860|40,130|48,210|1969/70|34,480|47,290|62,820|2009/10|32,100|42,010|54,600|1930/31|28,850|37,480|49,130|1970/71|28,180|40,040|54,330|2010/11|22,000|35,480|56,300|1931/32|29,860|40,700|56,380|1971/72|29,380|38,470|55,880|2011/12|24,800|37,070|54,900|1932/33|27,700|40,950|50,950|1972/73|25,760|37,290|50,400|2012/13|27,800|39,660|56,600|1933/34|31,090|40,700|63,670|1973/74|31,530|39,560|52,180|2013/14|30,300|42,080|57,800|1934/35|31,830|43,560|57,310|1974/75|29,960|41,340|63,650|2014/15|26,000|37,860|61,100|1935/36|32,640|41,650|56,770|1975/76|32,410|42,710|59,240|2015/16|29,800|41,360|58,700|1936/37|31,400|42,120|57,900|1976/77|33,390|45,760|57,770|2016/17|26,400|37,260|53,800|1937/38|30,100|40,060|56,790|1977/78|33,150|43,550|62,440|2017/18|28,600|40,130|60,100|1938/39|29,040|41,260|62,380|1978/79|33,570|45,180|52,280|2018/19|28,200|40,770|70,900|1939/40|30,210|42,110|52,780|1979/80|33,340|41,150|59,530|2019/20|35,200|50,250|67,200|1940/41|31,370|40,320|57,110|1980/81|29,680|40,710|52,160|2020/21|28,700|40,830|59,200|1941/42|31,190|42,150|55,200|1981/82|29,270|38,930|49,020

Width and depth{| class"wikitable" style"text-align:center;"

! Max depth (m) {{coord|5|08|30.4|S|13|59|27.9|E}} {{coord|5|02|57.3|S|13|59|28.2|E}} {{coord|5|01|49.5|S|14|01|37.2|E}} {{coord|5|2|20.6|S|14|02|09.2|E}} {{coord|4|56|50.7|S|14|09|21.2|E}} {{coord|4|55|38.5|S|14|15|16.5|E}} {{coord|4|54|03.3|S|14|24|18.2|E}} Brazzaville{{coord|4|16|47.3|S|15|18|32.8|E}} {{coord|4|05|24.4|S|15|30|39.1|E}} {{coord|3|52|43.4|S|15|55|11.6|E}} {{coord|3|33|18.7|S|16|05|32.2|E}} {{coord|3|28|52.5|S|16|07|18.3|E}} {{coord|3|11|23.7|S|16|11|09.6|E}} {{coord|3|10|36.4|S|16|11|41.5|E}} {{coord|3|09|59.7|S|16|10|51.7|E}} {{coord|2|48|33.9|S|16|11|40.1|E}} {{coord|2|12|22.9|S|16|10|49.0|E}} {{coord|2|09|28.5|S|16|12|16.5|E}} {{coord|1|52|15.5|S|16|30|43.4|E}} {{coord|1|37|55.5|S|16|37|59.4|E}} {{coord|1|14|22.2|S|16|47|44.5|E}} {{coord|1|03|13.5|S|17|08|58.0|E}} {{coord|0|54|39.2|S|17|23|27.1|E}} {{coord|0|43|38.5|S|17|33|02.9|E}} {{coord|0|41|00.4|S|17|36|43.7|E}} {{coord|0|25|58.1|S|17|50|13.3|E}} {{coord|0|01|17.4|N|18|13|10.9|E}} {{coord|0|30|22.1|N|25|11|03.4|E}}

Tributaries

(File:CongoLualaba watershed plain political.png|thumb|Course and drainage basin of the Congo River with countries marked)(File:CongoLualaba watershed topo.png|thumb|Course and drainage basin of the Congo River with topography shading)The main river and tributaries are (sorted in order from the mouth heading upstream):{| class="wikitable" style="text-align:center;" (river mouth to Kinshasa) (Kinshasa to the Boyoma Falls) Lefini River>Léfini Likouala-Mossaka>Likouala Sangha River>Sangha 71 |1,566.6 Itimbiri River>Itimbiri Lindi River>Lindi (Lualaba; upstream from the Boyoma Falls) Ulindi River>Ulindi Elila River>Elila Luama River>Luama Lukuga River>Lukuga Luvua River>Luvua gongo JOURNAL,weblink Satellite-based estimates of surface water dynamics in the Congo River Basin (HAL), International Journal of Applied Earth Observation and Geoinformation, 2017, 66, 196, 10.1016/j.jag.2017.11.015, Becker, Melanie, Papa, F., Frappart, Frédéric, Alsdorf, D., Calmant, S., Silva, J. Santos da, Prigent, C., Seyler, F., 6873734, 2022-10-28, 2022-10-06,weblink live, WEB,weblink Topographic maps, 2022-10-28, 2022-10-28,weblink live, WEB,weblink Comission Internationale du Bassin Congo-Oubangui-Sangha (CICOS), 2014, 2022-10-28, 2022-10-28,weblink live, WEB,weblink Congo River, WEB,weblink Le Fleuve Congo, Lower Congo (river mouth to Kinshasa)Downstream of Kinshasa, from the river mouth at Banana, there are a few major tributaries.

• M'pozo (left)
• Kwilu (left)
• Inkisi (left)
• Foulakary (right)
• Djoué (right)

Middle Congo (Kinshasa to the Boyoma Falls)

• Nsele (left)
• Lufimi (left)
• Mary (right)
• Kwa–Kasai (left)
  • Fimi
    • Lukenie
    • Lokoro – Lake Mai-Ndombe
  • Kwango
    • Culio
    • Wamba
    • Kwilu

Kwenge Inzia

• Loange
• Sankuru
  • Lubilanji
  • Lubefu
  • Lubudi
• Lulua
• Chicapa
• Luachimo
• Lubembe
  • Chiumbe
• Léfini (right)
• Nkeni (right)
• Alima (right)
• Likouala-Mossaka (right)
• Sangha (right)
  • Likouala aux Herbes
  • Ngoko
    • Boumba
  • Kadéï (570 km, 41,000 km², 466 m3/s)
  • Mambéré
• Ubangi (right)
  • Giri
  • Lua
  • Lobaye
  • Mbali
  • Ouaka
  • Kotto
  • Mbomou
    • Chinko
    • Mbari
    • Bili
  • Uele
    • Kibali
    • Dungu
    • Bomokandi
    • Uere
• Irebu – Lake Tumba (left)
• Ruki (left)
  • Momboyo
  • Busira
    • Salonga
    • Tshuapa or Ruki (left)

Lomela

• Ikelemba (left)
• Lulonga (left)
  • Lopori
  • Maringa
• Moeko (right)
• Mongala (right)
• Itimbiri (right)
• Aruwimi (right)
  • Ituri
  • Nepoko
• Lukombe (left)
• Lomami (left)
• Lindi (right)
  • Tshopo
• Maiko (right)

Upper Congo (Lualaba; upstream from the Boyoma Falls)

• Lilu (right)
• Ruiki (left)
• Lilo (left)
• Lowa (right)
  • Oso
• Ulindi (right)
  • Lugulu
• Kasuku (left)
• Ambe (right)
• Elila (right)
• Loho (left)
• Lubutu (left)
• Kunda (right)
• Luama (right)
• Luika (right)
• Lukuga (right)
  • Rusizi (Lake Tanganyika)
  • Malagarasi (Lake Tanganyika)
    • Ugalla
    • Gombe

Moyowosi

• Luvidjo (left)
• Luvua (right)
  • Kalungwishi (Lake Mweru)
  • Luapula (Lake Mweru; 740 km, 173,386 km², 741 m3/s)
    • Chambeshi (Lake Bangweulu, Bangweulu swamp; 500 km, 44,427 km², 185 m3/s)
• Kalumengongo (right)
• Lovoi (left)
• Lufira (right)
• Lubudi (left)
• Lufupa (left)

Economic importance

File:Oxfam East Africa - Mbandaka market.jpg|thumb|The town of MbandakaMbandakaFile:Congo maluku.jpg|thumb|right|The Congo River at Maluku.]]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|date=April 2017}} The Congo River still is a lifeline in a land with few roads or railways.See, for instance, Thierry Michel's film Congo River {{Webarchive |url=https://web.archive.org/web/20091129055817weblink |date=2009-11-29 }} 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.WEB, DR Congo – AFRICAN FINE COFFEES ASSOCIATION (AFCA), 7 October 2016,weblink 2021-04-24, en-US, 2021-04-24,weblink live,

Hydroelectric power

The Congo River is the most powerful river in Africa. During the rainy season over {{convert|50000|m3}} of water per second flows 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.Alain Nubourgh, Belgian Technical Cooperation (BTC) {{webarchive |url=https://web.archive.org/web/20110902053441weblink |date=2011-09-02 }}. Weetlogs.scilogs.be (2010-04-27). Retrieved on 2011-11-29.Currently, there are about 40 hydropower plants in the Congo Basin. The largest are the Inga dams, about {{convert|200|km}} southwest of Kinshasa. The project was launched in the early 1970s, when the first dam was completed.JOURNAL, Showers, Kate B., 145515488, 2011-09-01, Electrifying Africa: An Environmental History with Policy Implications, Geografiska Annaler: Series B, Human Geography, en, 93, 3, 193–221, 10.1111/j.1468-0467.2011.00373.x, 1468-0467, The plan (as originally conceived) called for the construction of five dams that would have had a total generating capacity of 34,500 megawatts (MW). 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 40,000 megawatts (MW).NEWS,weblink Could a $50bn plan to tame this mighty river bring electricity to all of Africa?, World news, The Guardian, London, Jeevan, Vasagar, 2005-02-25, 2010-04-30, It is feared that these new hydroelectric dams could lead to the extinction of many of the fish species that are native to the river.

Natural history

File:Chutes Livingstone.jpg|thumb|The beginning of the Livingstone Falls (Lower Congo Rapids) near KinshasaKinshasaThe current course of the Congo River formed between 1.5 and 2 million years BP, during the Pleistocene.BOOK, Leonard C. Beadle, The inland waters of tropical Africa: an introduction to tropical limnology,weblink 2 April 2011, 1981, Longman, 978-0-582-46341-7, Thieme et al., Freshwater Ecoregions of Africa and Madagascar: A Conservation Assessment Ecoregions Assessments, Island Press, 2005, p. 297 {{Webarchive|url=https://web.archive.org/web/20231110080156weblink |date=2023-11-10 }}. "It is hypothesized that in the late Pliocene or early Pleistocene, a coastal Lower Guinean river captured Malebo Pool, connecting the previously interior Congo Basin to the ocean." 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 systemCooper, John E. and Hull, Gordon; Gorilla Pathology and Health: With a Catalogue of Preserved Materials, p. 371 {{ISBN|9780128020395}} and the Chambeshi RiverSkelton, P.H. 1994. ‘Diversity and distribution of freshwater fishes in East and Southern Africa’, in Biological diversity in African fresh and brackish water fishes, Symposium Paradi (G.G. Teugels, J.F. Guégan, and J.J. Albaret, editors), pp. 95–131. Annals of the Royal Central African Museum (Zoology) No. 275. alongside a number of upper Kasai River tributaries from the Zambezi system.Gupta, Avijit (editor); Large Rivers: Geomorphology and Management, p. 327 {{ISBN|9780470849873}}The Congo's formation may have led to the allopatric speciation of the bonobo and the common chimpanzee from their most recent common ancestor.JOURNAL, Caswell JL, Mallick S, Richter DJ, Analysis of chimpanzee history based on genome sequence alignments, PLOS Genet., 4, 4, e1000057, 2008, 18421364, 2278377, 10.1371/journal.pgen.1000057, etal, free, 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.BOOK, Kingdon, Jonathan, Jonathan Kingdon, 1997, The Kingdon Guide to African Mammals, Academic Press Limited, London, 978-0-1240-8355-4,weblink registration, IUCN, BirdLife International, BirdLife International, 2022, Afropavo congensis, e.T22679430A208189646, 10.2305/IUCN.UK.2022-1.RLTS.T22679430A208189646.en, 16 December 2023, In terms of aquatic life, the Congo River Basin has a very high species richness and among the highest known densities of endemics.WEB, Evolution in the Deepest River in the World, Kyle, Dickman, 2009-11-03, Smithsonian Magazine, Science & Nature,weblink 2009-11-04,weblink" title="web.archive.org/web/20111109072934weblink">weblink 2011-11-09, live, {{As of|2009}}, almost 800 fish species have been recorded from the Congo River Basin (not counting Lake Tanganyika, which is connected but ecologically very different),BOOK, Frans Witte, Martien J. P. van Oijen, Ferdinand A. Sibbing, 2009, Fish Fauna of the Nile, Henri J. Dumont, The Nile, Springer, 647–675, 978-1-4020-9725-6, and large sections remain virtually unstudied.Freshwater Ecoregions of the World (2008). Sudanic Congo â€“ Oubangi. {{webarchive |url=https://web.archive.org/web/20111005204356weblink |date=2011-10-05}} Accessed 2 May 2011. For example, the section in Salonga National Park, which is about the size of Belgium, had still not been sampled at all in 2006.JOURNAL, Schliewen, U.K., Stiassny, M.L.J., 2006, A new species of Nanochromis (Teleostei: Cichlidae) from Lake Mai Ndombe, central Congo Basin, Democratic Republic of Congo, Zootaxa, 1169, 33–46, 86533120, 10.11646/zootaxa.1169.1.2, New fish species are scientifically described with some regularity from the Congo River Basin, and many undescribed species are known.JOURNAL, Schwarzer, J., Misof, B., Schliewen, U.K., 2011, Speciation within genomic networks: a case study based on Steatocranus cichlids of the lower Congo rapids, Journal of Evolutionary Biology, 25, 1, 138–148, 10.1111/j.1420-9101.2011.02409.x, 22070232, free, 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.BOOK, Winemiller, K.O., A.A. Agostinho, É.P. Caramaschi, Fish Ecology in Tropical Streams, Tropical Stream Ecology, Dudgeon, D., 2008, 107–146, Academic Press, 978-0-12-088449-0, Because of the great ecological differences between the regions in the Congo basin —including habitats such as river rapids, deep rivers, swamps, and lakes— it is often divided into multiple ecoregions (instead of treating it as a single ecoregion). Among these ecoregions, the Livingstone Falls cataracts has more than 300 fish species,WEB, Weisberger, Mindy, Dying Fish Revealed Congo Is World's Deepest River,weblink livescience.com, LiveScience, 12 January 2020, 14 January 2020,weblink 14 January 2020, live, including approximately 80 endemicsWEB, Norlander, Britt, 20 April 2009,weblink 8 July 2012,weblink" title="archive.today/20120708055831weblink">weblink dead, Rough waters: one of the world's most turbulent rivers is home to a wide array of fish species. Now, large dams are threatening their future, Science World, while the southwestern part (Kasai River basin) has more than 200 fish species, of which about a quarter are endemic.Freshwater Ecoregions of the World (2008). Kasai. {{webarchive |url=https://web.archive.org/web/20111005204417weblink |date=2011-10-05}} Accessed 2 May 2011. The dominant fish families – at least in parts of the river – are Cyprinidae (carp/cyprinids, such as Labeo simpsoni), Mormyridae (elephant fishes), Alestidae (African tetras), Mochokidae (squeaker catfishes), and Cichlidae (cichlids).Freshwater Ecoregions of the World (2008). Upper Lualaba. {{webarchive |url=https://web.archive.org/web/20111005204143weblink |date=2011-10-05}} Accessed 2 May 2011. 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 {{convert|160|m|ft}} below the surface, Heterochromis multidens, which is more closely related to cichlids of the Americas than other African cichlids,Kullander, S.O. (1998). A phylogeny and classification of the South American Cichlidae (Teleostei: Perciformes). pp. 461–498 in Malabarba, L., et al. (eds.), Phylogeny and Classification of Neotropical Fishes, Porto Alegre. and Caecobarbus geertsii, the only known cavefish in Central Africa.BOOK, Proudlove, G., Subterranean fishes of the world, 2006, International Society for Subterranean Biology, 978-2-9527084-0-1, There are also numerous endemic frogs and snails.Freshwater Ecoregions of the World (2008). Lower Congo Rapids. {{webarchive |url=https://web.archive.org/web/20111005204434weblink |date=2011-10-05}} Accessed 2 May 2011. Several hydroelectric dams are planned on the river, and these may lead to the extinction of many of the endemics.Several species of turtles and the slender-snouted, Nile and dwarf crocodile are native to the Congo River Basin. African manatees inhabit the lower parts of the river.IUCN, Keith Diagne, L., 2015, Trichechus senegalensis, 2016, e.T22104A97168578, 10.2305/IUCN.UK.2015-4.RLTS.T22104A81904980.en, 16 December 2023,

History

Pre-colonial history

{{See also|Category:Ethnic groups in the Democratic Republic of the Congo}}(File:Mercator Congo map.jpg|thumb|17th-century map of the Congo estuary)(File:Routes of European explorers in Africa, to 1853.jpg|thumb|In this 1853 map of Africa, the remaining Unexplored Region essentially corresponds to the Congo basin)The entire Congo basin is populated by Bantu peoples, divided into several hundred ethnic groups. 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 in the late 14th century from a merging of the kingdoms of Mpemba Kasi and 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 Kongo Central province. European exploration of the Congo began in 1482 when Portuguese explorer Diogo Cão discovered the river estuary{{sfn|Cana|1911|p=917}} (likely in August 1482), which he marked by a Padrão, or stone pillar (still existing, but only in fragments) erected on Shark Point. Cão sailed up the river for a short distance, establishing contact with the Kingdom of Kongo. The full course of the river remained unknown throughout the early modern period.{{efn|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 (:File:Congo map 1690.jpg|Atlas Maior) of 1660. Jacques Bellin's (:File:Congo map 1754.jpg|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.}}The upper Congo basin runs west of the Albertine Rift.{{sfn|Cana|1911|p=917}} 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 followed the Zambezi and reached the uppermost part of the Congo basin (the Kazembe in the upper Luapula basin) in 1796.The upper Congo River 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.{{sfn|Cana|1911|p=917}} 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.BOOK, Livingstone, David, Livingstone's 1871 Field Diary. A Multispectral Critical Edition, 2012, UCLA Digital Library: Los Angeles, CA,weblink dead,weblink" title="web.archive.org/web/20140905100511weblink">weblink 2014-09-05, >BOOK, Jeal, Tim, 1973, Livingstone, New Haven, CT, Yale University Press, 331–335,

Early European colonization

File:Advance Column of the Emin Pasha Relief Expedition 1890.jpg|thumb|Henry M Stanley with the officers of the Advance Column, Cairo, 1890. From the left: Dr. Thomas Heazle Parke, Robert H. Nelson, Henry M. Stanley, William G. Stairs, and Arthur J. M. JephsonArthur J. M. JephsonFile:Monument aux pionniers belges au Congo 001.jpg|thumb|Congo River Allegory by Thomas Vinçotte.Brussels, Monument to Congo pionniers, 50th Jubileum Park.]]The Europeans had not reached the central regions of the Congo basin from either the east or west, until Henry Morton Stanley's expedition of 1876–77, supported by the Committee for Studies of the Upper Congo. At the time one of the last open questions of the European exploration of Africa was whether the Lualaba River fed the Nile (Livingstone's theory), the Congo,{{sfn|Jeal|2007|pp=188–219}} or even the Niger River. 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 center 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 {{convert|150|km|mi|sigfig=1}} 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 eight children and 16 women. They had 23 canoes. His first encounter with a local tribe was with the cannibal Wenya. In total Stanley reports 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 with slave traders.On January 6, 1877, after {{convert|400|mi|km|order=flip}}, they reached Boyoma Falls (called Stanley Falls for some time after), consisting of seven cataracts spanning {{convert|60|mi|km|sigfig=1|order=flip}} 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,{{sfn|Jeal|2007|p=199; February 7, 1877}} 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{{what?|date=May 2020}} but possessed firearms, apparently as a result of Portuguese influence{{citation needed|date=May 2020}}. Some four weeks and {{convert|1200|mi|km|order=flip}} 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 an elevation change of {{convert|900|ft|m|order=flip}} over {{convert|220|mi|km|order=flip}}. 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.{{sfn|Jeal|2007|p=217}}BOOK, Through the Dark Continent, Stanley, Henry M., 1988, Dover Publications, 978-0-486-25667-2, Reprint, Originally published: London: G. Newnes, 1899, Kinshasa was founded as a trading post by Stanley in 1881 and named Léopoldville in honor of Leopold II of Belgium. The Congo Basin was privately claimed by Leopold II as Congo Free State in 1885 where the many Atrocities in the Congo Free State were committed until the region was called the Belgian Congo.

See also

• List of crossings of the Congo River
• 2021 Congo River disaster

Notes

{{notelist}}

References

General sources

• EB1911, Congo, 6, Cana, Frank Richardson, 914–917,
• BOOK, Forbath, Peter, 1979, The River Congo: The Discovery, Exploration and Exploitation of the World's Most Dramatic River, New York, E. P. Dutton, 0-525-47573-7,weblink
• BOOK, Jeal, Tim, 2007, Stanley: The Impossible Life of Africa's Greatest Explorer, Faber & Faber, London, 978-0-571-22102-8,

External links

{{Commons+cat|Congo River|Congo River}}

• The Royal Geography Society's Hidden Journeys project:
  • weblink" title="web.archive.org/web/20140714120922weblink">The River Congo Basin
  • weblink" title="web.archive.org/web/20140714172521weblink">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
• weblink" title="web.archive.org/web/20120813015647weblink">Map of the Congo River basin at Water Resources eAtlas
• The Congo Project, American Museum of Natural History

{{DRC topics}}{{Rivers of the Democratic Republic of the Congo}}{{Rivers of the Republic of the Congo}}{{Rivers of Angola}}{{Authority control}}