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Ogooué River

From Wikipedia
Ogooué River
river
Mouth of the watercourseGulf of Guinea Edit
TributaryIvindo River, Ngounie River, Lolo River, Wagny River Edit
CountryRepublic of the Congo, Gabon Edit
Edey de administrative territorial entity insydRepublic of the Congo, Gabon Edit
Coordinate location2°40′0″S 14°30′0″E, 0°57′40″S 8°50′52″E, 0°49′0″S 9°0′0″E Edit

De Ogooué (anaa Ogowe), dem sanso know as de Nazareth River, sam 1,200 km (750 mi) long, be de principal river of Gabon insyd west-central Africa den de fourth largest river insyd Africa by volume of discharge, wey dey trail only de Congo, Kasai den Niger. Ein watershed dey drain nearly de entire country of Gabon, plus sam tributaries wey dey reach into de Republic of the Congo, Cameroon, den Equatorial Guinea.[1]

Geography

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Course

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De source of de Ogooué River be discovered insyd 1894 by Mary Kingsley, an English explorer wey travel up de banks by steamboat den canoe. De river dey rise insyd de northwest of de Bateke Plateaux near Kengue, Republic of Congo.[1] E dey run northwest, den dey enter Gabon near Boumango. Poubara Falls be near Maulongo. From Lastoursville up to Ndjole, de Ogooué be non-navigable secof rapids. From de latter city, e dey run west, den dey enter de Gulf of Guinea near Ozouri, south of Port Gentil. De Ogowe Delta be quite large, about 100 km long den 100 km wide.

Delta

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A 30,000 ha site insyd de delta of de Ogooué River, wey dey include much of Mandji Island, be designated an Important Bird Area (IBA) by BirdLife International secof e dey support significant populations of chaw bird species.[2]

Basin

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De Ogooué Basin be 223,000 km2 (86,000 mi2), of wich 189,500 km2 (73,200 mi2) anaa 85 percent dey lie within Gabon.[3]

Ogooué River Basin area by country:[3]

Distance from river mouth:[4]

Station River

kilometer

(rkm)

Altitude

(m)

Lambaréné 183 12
Ngounié* 196 13
Abanga* 242 20
Ndjolé 280 25
Okano* 314 40
N'golo* 359 72
Offoué* 424 142
Booué 451 161
Ivindo * 481 180
Dilo* 503 182
Lolo* 512 186
Lassio* 535 200
Lastoursville 616 226
Sébé* 685 242
Leyou* 696 243
Léconi* 714 248
Lékabi* 725 249
Lébombi* 774 270
Mpassa* 802 280
Baniaka* 871 426

*River insyd confluence

Gauging stations along de Ogooué River:[5]

Station River kilometer (rkm) Elevation (m) Drainage basin

(km2)

Average discharge (m3/s) *
Ogooué Delta 0 0 225,217.5 5,148.05
Lambaréné 183 12 205,228.5 4,485.4
Ndjolé 280 25 160,106.9 3,191.5
Booué 451 161 130,931.4 2,746.9
Lastoursville 616 226 45,767.1 1,305
Franceville 802 280 8,570.2 233.4
* Period: 1971–2000

Discharge

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Month Average monthly flow

(m³/s) at delta[6]

Dry years Normal Wet years
DEC–FEB 3,744.5 4,285 4,826.5
MAR–MAY 4,883 6,336 7,789
JUN–AUG 1,625.3 1,997 2,188.7
SEP–NOV 6,935 8,041 9,147
Average 4,296.7 5,142.25 5,987.8
Ogooué River discharge (m3/s) at Lambaréné gauging station (period from 1929–2017):
Water year Min Mean Max Water year Min Mean Max
1929/30 1,250 3,569 5,030 1969/70 2,193 5,386 9,533
1930/31 1,390 4,238 6,980 1970/71 1,649 4,214 8,220
1931/32 1,590 4,259 7,580 1971/72 1,739 3,826 6,871
1932/33 1,380 4,126 6,630 1972/73 1,720 4,199 7,100
1933/34 2,390 5,449 10,800 1973/74 1,570 4,252 8,260
1934/35 1,850 4,888 6,690 1974/75 1,670 4,642 8,940
1935/36 1,690 4,612 7,850 1975/76–1979/80: No data
1936/37 1,930 4,835 8,210 1980/81 1,550 4,290 7,820
1937/38 1,780 4,791 7,180 1981/82 1,740 4,100 6,900
1938/39 2,170 5,905 11,300 1982/83 1,140 3,520 8,550
1939/40 1,950 4,762 6,930 1983/84 902 4,230 6,530
1940/41 1,740 3,936 6,460 1984/85 2,200 4,670 7,610
1941/42 1,430 3,707 5,720 1985/86 1,610 4,060 6,800
1942/43 1,370 4,292 6,880 1986/87 1,580 3,690 7,160
1943/44 2,330 5,874 9,450 1987/88 1,970 4,940 8,880
1944/45 2,140 5,273 7,980 1988/89 1,780 4,700 9,810
1945/46 1,690 4,600 8,490 1989/90 2,060 5,030 10,800
1946/47 2,340 5,861 9,310 1990/91–1994/95: No data
1947/48 2,120 5,545 9,780 1995/96 1,300 4,450 8,310
1948/49 2,640 5,912 10,600 1996/97 1,320 4,216 6,510
1949/50 1,950 5,300 9,600 1997/98 1,110 3,661 6,300
1950/51 1,640 5,280 9,470 1998/99 1,290 3,595 7,940
1951/52 2,350 5,660 9,080 1999/00 1,280 4,798 8,350
1952/53 2,050 4,770 7,200 2000/01 1,290 3,971 7,770
1953/54 1,300 3,597 5,690 2001/02 1,200 4,629 8,260
1954/55 1,900 4,383 7,530 2002/03 1,570 4,722 8,030
1955/56 1,400 4,278 8,100 2003/04 1,900 3,703 5,590
1956/57 1,660 4,252 7,420 2004/05 1,350 3,717 6,020
1957/58 979 3,093 5,110 2005/06 1,500 4,695 8,640
1958/59 1,580 4,179 8,250 2006/07 1,740 4,883 8,720
1959/60 2,160 5,073 9,350 2007/08 1,640 5,112 11,170
1960/61 2,190 5,970 11,000 2008/09 2,520 5,850 9,180
1961/62 1,910 5,227 8,210 2009/10 1,480 3,985 7,260
1962/63 2,170 4,799 6,830 2010/11 1,510 3,690 5,790
1963/64 1,810 4,647 8,500 2011/12 2,190 4,038 9,420
1964/65 2,100 5,074 7,510 2012/13 960 3,931 7,270
1965/66 2,150 5,500 9,470 2013/14 1,420 4,588 8,370
1966/67 1,600 4,482 10,100 2014/15 1,090 3,890 6,930
1967/68 1,823 4,451 7,557 2015/16 980 3,794 8,090
1968/69 2,093 5,020 7,607 2016/17 1,510 3,846 6,490
Source:[7][8][9]

Tributaries

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Ogooué River
Fan women den kiddie, banks of de Ogoway. From The earth and its inhabitants, Africa (published 1890-1893 [v.1, 1892] )

De Ogowe River dey receive water of numerous tributaries wey dey include:

  • Abanga, wich dey rise insyd de Cristal Mountains, near Medouneu
  • Baniaka
  • Dilo
  • Iyinda, de most important tributary
  • Letili
  • Lassio
  • Lebombi
  • Lekabi
  • Lekedi
  • Lekoni, wich dey flow across Akieni den Leconi
  • Letili
  • Leyou
  • Lolo
  • Mbine
  • Ngolo
  • Ngounie
  • Nke
  • Offoue
  • Okano, wey ein main tributary be de Lara River
  • Mpassa, wich dey flow across Franceville
  • Sebe, wich dey flow past Okondja
  • Wagny

References

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  1. 1 2 Scheffel, Richard L.; Wernet, Susan J., eds. (1980). Natural Wonders of the World. United States of America: Reader's Digest Association, Inc. p. 275. ISBN 0-89577-087-3.
  2. ↑ "Ogooué delta and Mandji island". BirdLife Data Zone. BirdLife International. 2024. Retrieved 2024-12-01.
  3. 1 2 "Africa: International River Basin register".
  4. ↑ PROSPECTION HYDRO-ÉLECTRIQUE GÉNÉRALE DES BASSINS DE L'OGOOUÉ ET DE LA NYANGA (PDF) (Report). ÉLECTRICITÉ DE FRANCE (EDF). 1966. p. 75.
  5. ↑ Eric, Tilman. "Central West Coast".
  6. ↑ Aiguo, Dai; Kevin, E. Trenberth (2002). "Estimates of Freshwater Discharge from Continents: Latitudinal and Seasonal Variations". Journal of Hydrometeorology. 3 (6): 660–687. Bibcode:2002JHyMe...3..660D. doi:10.1175/1525-7541(2002)003<0660:EOFDFC>2.0.CO;2.
  7. ↑ "Global River Discharge Database".
  8. ↑ Moquet, Jean-Sébastien; Bouchez, Julien; Braun, Jean-Jacques; Bogning, Sakaros; Mbonda, Auguste Paulin; Carretier, Sébastien; Regard, Vincent; Bricquet, Jean-Pierre; Paiz, Marie-Claire; Mambela, Emmanuel; Gaillardet, Jérôme (2021). "Contrasted Chemical Weathering Rates in Cratonic Basins: The Ogooué and Mbei Rivers, Western Central Africa". Frontiers in Water. 2. Bibcode:2021FrWat...2.9070M. doi:10.3389/frwa.2020.589070.
  9. ↑ Sakaros, Bogning Dongue; Frédéric, Frappart; Gil, Mahe; Fernando, Niño; Adrien, Paris; Joëlle, Sihon; Franck, Ghomsi; Fabien, Blarel; Jean-Pierre, Bricquet; Raphaël, Onguéné; Jacques, Etame; Frédérique, Seyler; Marie-Claire, Paiz; Jean-Jacques, Braun (2021). "Long-term Hydrological Variations of the Ogooue River Basin". Hydrology. 105. Bibcode:2021esoar.10505633B. doi:10.1002/essoar.10505633.1.
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