%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Amogu, Okechukwu
%A Esteves, Michel
%A Vandervaere, J. P.
%A Abdou, M. M.
%A Panthou, G.
%A Rajot, Jean-Louis
%A Yero, K. S.
%A Boubkraoui, Stéphane
%A Lapetite, Jean-Marc
%A Dessay, Nadine
%A Zin, I.
%A Bachir, A.
%A Moussa, I. B.
%A Maiga, O. F.
%A Gautier, E.
%A Mamadou, I.
%A Descroix, Luc
%T Evolution de l'écoulement d'un petit bassin-versant sahélien en lien avec les changements d'usage des sols
%D 2014
%L fdi:010063605
%G FRE
%J Hydrological Sciences Journal = Journal des Sciences Hydrologiques
%@ 0262-6667
%K land-use changes ; duration of flow ; runoff coefficient ; Sahel ; crusted soils
%K NIGER ; SAHEL
%M ISI:000346588200006
%N 1
%P 78-95
%R 10.1080/02626667.2014.885654
%U https://www.documentation.ird.fr/hor/fdi:010063605
%> https://www.documentation.ird.fr/intranet/publi/2015/01/010063605.pdf
%V 60
%W Horizon (IRD)
%X Land-use changes have been significant these last decades in West Africa, particularly in the Sahel region; in this area, climatic and demographic factors have led to a rise in cropped areas in recent decades causing strong changes in the water cycle and in river regimes. This study compares the rainfall-runoff relationships for two periods (1991-1994 and 2004-2011) in two small and similar neighbouring Sahelian catchments (approx 0.1 km(2) each). This allows identification of the different hydrological consequences of land-use/land-cover change, particularly the fallow shortening and the consequent degradation of topsoil. The main land surface change is a 75% increase in crusted soil area. Runoff increased by more than 20% on average between the two periods while flood duration decreased by 50% on average. However, runoff values remained largely constant in the lower part of the northern basin due to a strong increase in in-channel infiltration. Editor D. Koutsoyiannis; Associate editor T. Wagener
%$ 062 ; 068