Rainfall variability and inherent dry spells are a reality with severe implications for smallholder agro-ecosystems in semi-arid Sahel. To increase both on- and off-farm biomass production and productivity is challenging with these climate-induced temporal and spatial variations of water. This paper tests the idea that increased vegetation through tree cover may impact water balance in a water-stressed landscape: South-east Niger. Local rainfall data, farming systems data and a landscape water-modelling tool (ArcSWAT) are used. Four production domains (conventional or fertilized combined with millet crop or millet crop plus trees) were assessed for long-term yield and landscape water balance impacts. The dry-spell analysis shows a frequency of dry spells less than 14 days is in the order of one to two dry-spell events per season in 7 years out of 10 years. The occurrence has increased between 1960 and 2004, despite a slight recovery of total annual rainfall amounts since the severe droughts of the 1980s. ...

Coping with Rainfall Variability: Dry Spell Mitigation and Implication on Landscape Water Balances in Small-scale Farming Systems in Semi-arid Niger

G. MAHE, G. LIENOU, F. BAMBA, J. E. PATUREL, O. ADEAGA, L. DESCROIX, A. MARIKO, J. C. OLIVRY, S. SANGARE, A. OGILVIE & J. C. CLANET 1 IRD, Université Mohamed V Agdal, BP 8967, 10 000 Rabat Agdal, Morocco gil.mahe@ird.fr 2 Université Yaoundé I, Yaoundé, Cameroun 3 Ecole Nationale d’Ingénieurs, Bamako, Mali 4 HydroSciences Montpellier, France 5 University of Lagos, Lagos, Nigeria 6 LTHE, Grenoble, France 7 Université de Bamako, Bamako, Mali 8 Carqueiranne, France 9 DNH, Conakry, Guinea 10 G-EAU joint research unit, IRD, Montpellier, France

Le fleuve Niger et le changement climatique au cours des 100 dernières années

CPWF Project Report

/pdf/an-overview-of-the-development-challenges-and-constraints-of-2l2f72980g.pdf

An overview of the development challenges and constraints of the Niger Basin and possible intervention strategies

Basin Focal Project Niger

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Basin Focal Project Niger