Ouémé (river)
|
Ouémé Affon (In the upper reaches) |
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 Mouth of the Ouémé at Cotonou |
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| Data | ||
| location |
 Benin( West Africa ) |
|
| River system | Ouémé | |
| source | Atakora Mountains 9 ° 51 ′ 6 ″ N , 1 ° 32 ′ 10 ″ E |
|
| Source height | approx. 465 m | |
| muzzle |
Gulf of Guinea ( Atlantic Ocean ) Coordinates: 6 ° 21 ′ 11 " N , 2 ° 26 ′ 39" E 6 ° 21 ′ 11 " N , 2 ° 26 ′ 39" E |
|
| Mouth height | 0 m | |
| Height difference | approx. 465 m | |
| Bottom slope | approx. 0.91 ‰ | |
| length | 510 km | |
| Catchment area | 50,000 km² | |
| Discharge at the Bonou gauge (1733600) A Eo : 46,990 km² Location: 50 km above the mouth |
NNQ (min. Month Ø) MNQ 1948–1992 MQ 1948–1992 Mq 1948–1992 MHQ 1948–1992 HHQ (max. Month Ø) |
0 l / s 2.7 m³ / s 116 m³ / s 2.5 l / (s km²) 593 m³ / s 1175 m³ / s |
| Left tributaries | Okpara , Beffa, Alpouro, Yérou Maro | |
| Right tributaries | Terou , Adjiro, Zou , Donga, Wéwé, | |
| Flowing lakes | Nokoué lake | |
The Ouémé is a river in Benin , West Africa .
geography
With a length of 510 km and a catchment area of around 50,000 km², the Ouémé is the largest river in the West African state of Benin . Its catchment area extends over almost half of the country. It rises as an affon in the Atakora mountains of Benin and is only called after the mouth of the Alpouro Ouémé. Its course is almost exclusively in a southerly direction. It flows into the Gulf of Guinea on the coast of Benin over Lake Nokoué and the adjoining Porto-Novo Bay near the city of Cotonou .
The Ouémé has an average gradient of 0.9 m / km, in the upper reaches it is 20 m / km. The water temperature varies between 26 and 32 ° C depending on the season.
Hydrometry
The flow rate of the river was measured in m³ / s near the town of Bonou :
River fauna
In a study on Ouémé May 1999 to March 2001 50 fish species from 18 families were ( Protopteridae , Polypteridae , Clupeidae , Osteoglossidae , Mormyridae , Hepsetidae , Alestidae , Distichodontidae , Citharinidae , Bagridae , Claroteidae , Schilbeidae , Clariidae , Mochokidae , Channidae , centropomidae , Cichlidae , Anabantidae ) detected.
literature
- Lalèyè, PA (2006): Length-weight and length-length relationships of fishes from the Ouémé River in Bénin (West Africa) . Journal of Applied Ichthyology 22: 330-333.