Donga River

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Northwest region of Cameroon. Donga River in the north. NW Cameroon.svg
Northwest region of Cameroon. Donga River in the north.
Donga River at Abong, Nigeria in December 1990 Donga River at Abong Nigeria.jpg
Donga River at Abong, Nigeria in December 1990

The Donga River is a river in Nigeria and Cameroon. The river arises from the Mambilla Plateau in Eastern Nigeria, forms part of the international border between Nigeria and Cameroon, and flows northwest to eventually merge with the Benue River in Nigeria. [1] The Donga watershed is 20,000 square kilometres (7,700 sq mi) in area. At its peak, near the Benue the river delivers 1,800 cubic metres (64,000 cu ft) of water per second. [2]

Contents

In Taraba State, Nigeria, there are three forest reserves, Baissa, Amboi and Bissaula River, in the Donga river basin. They lie on the slopes and at the foot of the Mambilla Plateau, south-west of Gashaka Gumti National Park. [3]

Pollution

Research reveals that pesticides were the predominant organic pollutant in the Donga river. [4] [5]

Climate

The annual average temperature is around 33°C but high level of cold in January and an increased rainfall in August. Rainfal percentage is 40.35% with 54.98% relative humidity. It is usually very warm in March with 40.44°C, and an average wind of 8.84km/h. [6]

See also

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The Mambilla Plateau is a plateau in the Taraba State of Nigeria. The Mambilla Plateau has an average elevation of about 1,600 metres (5,249 ft) above sea level, making it the highest plateau in Nigeria. Some of its villages are situated on hills that are at least 1,828 metres (5,997 ft) above sea level. Some mountains on the plateau and around it are over 2,000 metres (6,562 ft) high, like Gang or Chappal Waddi which has a height of 2,419 metres (7,936 ft) above sea level. It is the highest mountain in Nigeria and in West Africa. The Mambilla Plateau measures about 96 km (60 mi) along its curved length; it is 40 km (25 mi) wide and is bounded by an escarpment that is about 900 m (2,953 ft) high in some places. The plateau covers an area of over 9,389 square kilometres (3,625 sq mi).

The Ngel Nyaki Forest Reserve, whose site is historically known as Majang, is situated on the Mambilla Plateau in North East Nigeria, covering 46 km2. It can be reached on foot from Yelwa village past the Mayo Jigawal, from where it is less than half an hour’s walk to the upper edge of the forest. The elevation ranges from 1,400 metres (4,593 ft) to 1,600 metres (5,249 ft). Ngel Nyaki was formally gazetted a local authority Forest Reserve under Gashaka - Mambilla Native Authority Forest order of April 1969, but presently it is under the management of the Taraba State Government and the Nigerian Conservation Foundation (NCF), with the Nigerian Montane Forest Project (NMFP) as a project partner.

<span class="mw-page-title-main">Gembu, Nigeria</span> City in Taraba State, Nigeria

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References

  1. "The Donga River is a river in Nigeria and Cameroon. The river arises from the Mambilla Plateau in Eastern Nigeria, forms part of the international border betwee…".
  2. Inger Andersen; Ousmane Dione; Martha Jarosewich-Holder; Jean-Claude Olivry (2005). "The Niger River Basin: A Vision for Sustainable Management" (PDF). World Bank . Retrieved 2011-02-06.
  3. "Donga river basin forests". BirdLife International . Retrieved 2011-02-06.
  4. https://www.researchgate.net/publication/358411829_Determination_of_Organic_Pollutants_In_Water_Samples_From_River_Donga_Taraba_State_Nigeria [ bare URL ]
  5. Eyiseh, Tukura Echuano. "Determination of heavy metals concentration in water and sediment of river donga, Taraba state" (PDF). International Journal of Fisheries and Aquatic Studies. 10 (5): 12 via fisheriesjournal.
  6. "Donga Climate, Weather By Month, Average Temperature (Nigeria) - Weather Spark". weatherspark.com. Retrieved 2023-10-02.

7°09′44″N10°34′18″E / 7.162128°N 10.571594°E / 7.162128; 10.571594