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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
The rivers of Africa: Witness of climate change and human impact on the environment
Hydrological Processes, Volume 27, No. 15, Year 2013
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Description
In this paper, we study the impact of climate change on river regimes in several parts of Africa, and we look at the most probable causes of these changes either climatically or anthropogenically driven. We study time series of updated monthly and annual runoff of rivers of North Africa, West Africa (Sahelian and humid tropical regions) and Central Africa, including the largest river basins: Niger and Volta rivers in West Africa, and Congo and Ogooue rivers in Central Africa. The recent years are studied in the perspective of multi-decadal variability. In West Africa and in a part of Central Africa, the climate has changed since 1970, and rainfall has not returned to previous annual amounts, except in Equatorial Africa. The consequences of the long-lasting drought are, depending on the area concerned, the modification of seasonal regimes (Equatorial area), the groundwater table decrease (Tropical humid area) and the land cover degradation (Sahelian area). The increasing number of dams and of agricultural areas also plays a major role on the modification of river regimes. The population increase will continue to impact on the environment: land cover change, deforestation, agriculture and increasing number of dams will be associated with a reduction of water and sediment discharges to the sea, and major impacts on downstream ecosystems and coastal areas. It seems necessary to share with stakeholders a comprehensive approach of the water cycle from the basin to the sea, to prevent long-lasting damages to ecosystems and infrastructures. © 2013 John Wiley & Sons, Ltd.
Authors & Co-Authors
Mahé, Gil
Morocco, Rabat
Mohammed V University in Rabat
Lienou, Gaston
Cameroon, Yaounde
Université de Yaoundé I
Descroix, Luc
France, Saint Martin D'heres
Institut Des Géosciences de L'environnement Ige
Bamba, Fatogoma
Mali, Bamako
Ecole Nationale D'ingénieurs
Paturel, Jean Emmanuel
Burkina Faso, Ouagadougou
Institut de Recherche Pour le Developpement Ouagadougou
Laraque, Alain
France, Paris
Cnrs Centre National de la Recherche Scientifique
Meddi, Mohamed Mohamed
Algeria, Blida
École Nationale Supérieure D’hyraulique de Blida
Habaïeb, Hamadi
Tunisia, Tunis
University of Carthage, Institut National Agronomique de Tunisie
Adeaga, Olusegun
Nigeria, Lagos
University of Lagos
Dieulin, Claudine
Morocco, Rabat
Mohammed V University in Rabat
Chahnez Kotti, F.
Tunisia, Tunis
University of Carthage, Institut National Agronomique de Tunisie
Khomsi, Kenza
Morocco, Casablanca
Direction de la Météorologie Nationale
Statistics
Citations: 137
Authors: 12
Affiliations: 10
Identifiers
Doi:
10.1002/hyp.9813
ISSN:
08856087
e-ISSN:
10991085
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Locations
Multi-countries
Congo
Niger