Cavally
|
Cavally Cavalla, Youbou, Diougou |
||
 The catchment area of the Cavally |
||
| Data | ||
| location |
West Africa Guinea Ivory Coast Liberia  
|
|
| River system | Cavally | |
| source | north of Mont Nimba 7 ° 35 ′ 35 ″ N , 8 ° 30 ′ 40 ″ W |
|
| Source height | 610 m | |
| muzzle |
Gulf of Guinea , Atlantic Ocean Coordinates: 4 ° 21 '54 " N , 7 ° 31' 46" W 4 ° 21 '54 " N , 7 ° 31' 46" W |
|
| Mouth height | 0 m | |
| Height difference | 610 m | |
| Bottom slope | 0.71 ‰ | |
| length | 861 km | |
| Catchment area | 30,277 km² | |
| Left tributaries | Doui, La Goin, Doue (Droni), Debe, Nse, Hana (river) , Neka, Tablou | |
| Right tributaries | Dube (river) , Gbeh, Ghee, Muno | |
 The Cavally near Tai, photographed from the Ivorian side |
||
The Cavally (also known as Cavalla , Youbou or Diougou ) is a stream in West Africa . The neighboring republics of Liberia , Ivory Coast and Guinea (only headwaters). The river is not navigable because of numerous rapids and shallows, but has been used by Africans for centuries with boats and dugout canoes.
course
The Cavally rises north of Mont Nimba in Guinea ; it then flows through the northern border region of the Ivory Coast in a southerly direction, from the city of Zwedru in Liberia the Cavally forms the border between the Ivory Coast and Liberia for long stretches to near the confluence with the Atlantic .
Its direction of flow changes in the rainforest- covered catchment area in the central reaches to the southeast and in the lower reaches to the south. The mouth of the Cavally is located about 21 kilometers east of the city of Harper on Cape Palmas in Liberia .
The total length of the Cavally is 515 km, the catchment area is given as 30,225 km². According to the Liberian Hydrological Service of the Ministry of Land, Mines and Energy of Liberia, the total length of the Cavally is 861 km and the drainage basin is given as 30,277 km².
The name Cavally , derived from Portuguese , denotes a species of mackerel found near the mouth .
Hydrometry
The flow of the river changes constantly with the seasons:
- on the upper reaches, at the Flampleu hydrographic station, Ivory Coast, catchment area 2 470 km², the maximum is reached in September, it is 104 m³ / s, the minimum is registered in March with 4 m³ / s.
- on the middle reaches, at the Tai hydrographic station, Ivory Coast, catchment area 13,750 km², the maximum is reached in September, it is then 386 m³ / s, the minimum is registered in March with 15 m³ / s.
- on the lower reaches, at the hydrographic station Tate, Ivory Coast, catchment area 28,800 km², the maximum is reached in September, it is then 1485 m³ / s, the minimum is registered in February and March with about 150 m³ / s.
Catchment area
The catchment area of the Cavally is spread over the countries of Guinea, Ivory Coast and Liberia, and is divided as follows:
| country | Area [km²] | percent |
|---|---|---|
| Ivory Coast | 16,600 | 54.8 |
| Liberia | 12,240 | 40.4 |
| Guinea | 1,437 | 4.7 |
| Cavally overall | 30,277 | 100.0 |
Tributaries
Most of the tributaries of the Cavally are rather small. Apart from the Dube , Hana and Ghee, all tributaries are significantly shorter than 100 km. The corresponding catchment areas are correspondingly small. The catchment area of the Cavally is divided as follows:
| River name | Catchment area size [km²] | Tributary length [km] | Percent of the catchment area | Direction of the tributary |
|---|---|---|---|---|
| Doui | 504 | 42 | 1.7 | Left |
| La Goin | 757 | 64 | 2.5 | Left |
| Doue (Droni) | 624 | 57 | 2.1 | Left |
| Debe | 764 | 52 | 2.5 | Left |
| Nse | 1,249 | 61 | 4.1 | Left |
| Hana | 4,494 | 115 | 14.8 | Left |
| Dube | 6.248 | 279 | 20.6 | Right |
| Neka | 546 | 49 | 1.8 | Left |
| Gbeh | 1.101 | 63 | 3.6 | Right |
| Tablou | 664 | 60 | 2.2 | Left |
| Ghee | 1.071 | 111 | 3.5 | Right |
| Muno | 454 | 64 | 1.5 | Left |
| Tributaries total | 18,476 | 1,017 | 61.0 | |
| Cavally | 11.801 | 861 | 39.0 | |
| Cavally overall | 30,277 | 1,878 | 100.0 |
literature
- JW Lugenbeel: The republic of Liberia: its geography, climate, soil and productions, with a history of its early settlements . GS Stockwell, New York 1868, p. 299 . ( Digitized at Google Books)
Individual evidence
- ↑ a b c d e Liberian Hydrological Services - Cavalla River Principal Basin Tables, Figures and Maps
- ^ Ian Brownlie: African boundaries; a legal and diplomatic encyclopaedia . London 1979, ISBN 0-903983-87-7 , Guinea – Liberia, Ivory Coast – Liberia, Liberia – Sierra Leone, pp. 304-309, 358-370, 379-405 .
- ^ Cavalla River. In: Enzyclopaedia Britannica (Online). Retrieved January 15, 2011 .
- ^ Cavally River (390). (No longer available online.) In: River Discharged Database, Gaylord Nelson Institute, University of Wisconsin – Madison . Archived from the original on June 12, 2010 ; Retrieved January 15, 2011 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ Cavally River (391). (No longer available online.) In: River Discharged Database, G.Nelson Inst. Archived from the original on June 12, 2010 ; Retrieved January 15, 2011 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ Cavally River (392). (No longer available online.) In: River Discharged Database, G. Nelson Inst. Archived from the original on July 14, 2007 ; Retrieved January 15, 2011 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ JICA publication
- ↑ Liberia River Basins 2016 - Drainage Divisions and River Basin Boundaries
