@article{fdi:010063605, title = {{E}volution de l'{\'e}coulement d'un petit bassin-versant sah{\'e}lien en lien avec les changements d'usage des sols}, author = {{A}mogu, {O}kechukwu and {E}steves, {M}ichel and {V}andervaere, {J}. {P}. and {A}bdou, {M}. {M}. and {P}anthou, {G}. and {R}ajot, {J}ean-{L}ouis and {Y}ero, {K}. {S}. and {B}oubkraoui, {S}t{\'e}phane and {L}apetite, {J}ean-{M}arc and {D}essay, {N}adine and {Z}in, {I}. and {B}achir, {A}. and {M}oussa, {I}. {B}. and {M}aiga, {O}. {F}. and {G}autier, {E}. and {M}amadou, {I}. and {D}escroix, {L}uc}, editor = {}, language = {{FRE}}, abstract = {{L}and-use changes have been significant these last decades in {W}est {A}frica, particularly in the {S}ahel 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. {T}his study compares the rainfall-runoff relationships for two periods (1991-1994 and 2004-2011) in two small and similar neighbouring {S}ahelian catchments (approx 0.1 km(2) each). {T}his allows identification of the different hydrological consequences of land-use/land-cover change, particularly the fallow shortening and the consequent degradation of topsoil. {T}he main land surface change is a 75% increase in crusted soil area. {R}unoff increased by more than 20% on average between the two periods while flood duration decreased by 50% on average. {H}owever, runoff values remained largely constant in the lower part of the northern basin due to a strong increase in in-channel infiltration. {E}ditor {D}. {K}outsoyiannis; {A}ssociate editor {T}. {W}agener}, keywords = {land-use changes ; duration of flow ; runoff coefficient ; {S}ahel ; crusted soils ; {NIGER} ; {SAHEL}}, booktitle = {}, journal = {{H}ydrological {S}ciences {J}ournal = {J}ournal des {S}ciences {H}ydrologiques}, volume = {60}, numero = {1}, pages = {78--95}, ISSN = {0262-6667}, year = {2014}, DOI = {10.1080/02626667.2014.885654}, URL = {https://www.documentation.ird.fr/hor/fdi:010063605}, }