Hadejia (river)

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Hadejia
Haɗeja
Catchment area of ​​the Komadugu Yobe with the Hadejia (middle left)

Catchment area of the Komadugu Yobe with the Hadejia (middle left)

Data
location NigeriaNigeria Nigeria
River system Komadugu Yobe
Drain over Komadugu Yobe  → Lake Chad
source Confluence of the Kano and the Challawa at Kano
11 ° 50 ′ 45 ″  N , 8 ° 30 ′ 34 ″  E
Source height 433  m
muzzle Confluence with the Jama'arein the Hadejia-Nguru wetlands and formation of the Komadugu Yobe (coordinates estimated) Coordinates: 12 ° 35 ′ 0 ″  N , 10 ° 25 ′ 0 ″  E 12 ° 35 ′ 0 ″  N , 10 ° 25 ′ 0 ″  O
Mouth height about  350  m
Height difference about 83 m
Bottom slope about 0.31 ‰
length about 270 km
Catchment area 31,650 km²
Discharge at the Wudil
A Eo gauge: 16,380 km² 		MNQ
MQ
Mq
 MHQ
 22 m³ / s
63 m³ / s
3.8 l / (s km²)
 209 m³ / s
Discharge at the gauge Hadejia
A Eo : 25,900 km² 		MNQ
MQ
Mq
 MHQ
 13 m³ / s
25 m³ / s
1 l / (s km²)
 39 m³ / s

The Hadejia ( Hausa : kogin Haɗeja ) is a river in northern Nigeria and a tributary of the Komadugu Yobe .

course

The river arises from the confluence of the Kano and the Challawa , 15 km south of the city of Kano. It first describes a semicircle with a diameter of about 40 km to the south and then flows in a north-easterly direction towards Lake Nguru and the Hadejia-Nguru wetlands , where it gets lost. The cities of Hadejia and Nguru are on the banks of the river.

Hydrometry

The flow rate of the Hadejia was measured in m³ / s in Wudil, shortly after the confluence of the Kano and Challawa (read from the diagram).

Evaporation in the area through which the Hadejia flows is very high. Due to this and the low gradient, the outflow in l / (s * km²) is only a quarter.

ecology

Its source rivers are dammed for irrigation purposes by the Challawa Gorge dam and in the Tiga reservoir . The damming of the Hadejia for irrigation led to a reduction in the amount of water in the Hadejia-Nguru wetlands, which the Hadejia forms together with Nguru Lake. 80 percent of the river is controlled by the Tiga and Challawa Gorge dams.

Individual evidence

  1. ↑ a b Stream Ordering As a Tool For Effective River Basin Development: Examples From Komadugu –Yobe River Basin, Nigeria
  2. ↑ a b c Water resources potentials of Hadejia River Sub-catchment of Komadugu Yobe River Basin in Nigeria
  3. ↑ a b Hadejia . In: Encyclopædia Britannica . Encyclopædia Britannica, Inc. (English, britannica.com [accessed December 22, 2006]).
  4. ↑ Stream Flow regime change and ecological response in the Lake Chad basin in Nigeria
  5. ↑ Michael Acreman: Principles of Water Management for People and the Environment. In: Aaas.org. American Association for the Advancement of Science, accessed May 13, 2007 .
  6. ^ Irrigation potential in Africa: A basin approach. Food and Agriculture Organization of the United Nations, 1997, accessed October 1, 2009 .
  7. ↑ Challawa Gorge Reservoir. United Nations Environment Program, archived from the original on May 9, 2009 ; accessed on October 3, 2009 .