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Analysis of a Sahelian annual rainfall index from 1896 to 2000; the drought continues
Abstract Since 1970 the West African Sahel has experienced a significant drought which, according to some authors, corresponds to a discontinuity (abrupt change) in the rainfall series. An annualExpand
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Spatiotemporal variations in hydrological regimes within Central Africa during the XXth century
Abstract Using several statistical tests, we divided into homogeneous segments the XXth century long discharges data series and the rainfall data series of the Congo River and of several of its rightExpand
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Rainfall and Water Resources Variability in Sub-Saharan Africa during the Twentieth Century
Abstract River basin rainfall series and extensive river flow records are used to characterize and improve understanding of spatial and temporal variability in sub-Saharan African water resourcesExpand
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The impact of land use change on soil water holding capacity and river flow modelling in the Nakambe River, Burkina-Faso
Abstract The annual hydrological regime of the Nakambe River shows substantial changes during the period 1955–1998 with a shift occurring around 1970. From 1970 to the mid-1990s, despite a reductionExpand
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Spatio-temporal variability of hydrological regimes around the boundaries between Sahelian and Sudanian areas of West Africa: A synthesis
Abundant information is available on West African drought and its hydrological and environmental impacts. Land-use and climatic changes have greatly modified the conditions of Sudanian and SahelianExpand
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The Epidemiology and Geographic Distribution of Relapsing Fever Borreliosis in West and North Africa, with a Review of the Ornithodoros erraticus Complex (Acari: Ixodida)
Background Relapsing fever is the most frequent bacterial disease in Africa. Four main vector / pathogen complexes are classically recognized, with the louse Pediculus humanus acting as vector for B.Expand
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Water, agriculture and poverty in the Niger River basin
Livelihoods in the Niger River basin rely mainly on rainfed agriculture, except in the dry extreme north. Low yields and water productivity result from low inputs, short growing seasons, dry spells,Expand
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Hydrologie, agro-écologie et superficies d’inondation dans le delta intérieur du Niger
Dans cette etude, nous reprenons un modele d'extension maximale annuelle d'inondation du delta interieur construit a partir d'un decoupage agro-ecologique que nous testons a partir de donneesExpand
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The nature and impact of climate change in the Challenge Program on Water and Food (CPWF) basins
In this article the authors assess the potential impacts of projected climate change on water, livelihoods and food security in the Basin Focal Projet basins. The authors consider expected changeExpand
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Trends and discontinuities in regional rainfall of West and Central Africa: 1951–1989
Abstract Standardized regional mean annual rainfall series are analysed over the period 1951–1989 from a data set of 891 rainfall stations which covers 23 countries of West and Central Africa.Expand
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