@article{fdi:010073708, title = {{E}volution of surface hydrology in the {S}ahelo-{S}udanian strip : an updated review}, author = {{D}escroix, {L}uc and {G}uichard, {F}. and {G}rippa, {M}. and {L}ambert, {L}. {A}. and {P}anthou, {G}. and {M}ah{\'e}, {G}il and {G}al, {L}a{\¨e}titia and {D}ardel, {C}. and {Q}uantin, {G}uillaume and {K}ergoat, {L}. and {B}ouaita, {Y}asmin and {H}iernaux, {P}. and {V}ischel, {T}. and {P}ellarin, {T}. and {F}aty, {B}. and {W}ilcox, {C}. and {M}alam {A}bdou, {M}. and {M}amadou, {I}. and {V}andervaere, {J}. {P}. and {D}iongue-{N}iang, {A}. and {N}diaye, {O}. and {S}ane, {Y}. and {D}acosta, {H}. and {G}osset, {M}arielle and {C}asse, {C}laire and {S}ultan, {B}enjamin and {B}arry, {A}. and {A}mogu, {O}. and {N}ka {N}nomo, {B}. and {B}arry, {A}. and {P}aturel, {J}ean-{E}mmanuel}, editor = {}, language = {{ENG}}, abstract = {{I}n the {W}est {A}frican {S}ahel, two paradoxical hydrological behaviors have occurred during the last five decades. {T}he first paradox was observed during the 1968-1990s {G}reat {D}rought' period, during which runoff significantly increased. {T}he second paradox appeared during the subsequent period of rainfall recovery (i.e., since the 1990s), during which the runoff coefficient continued to increase despite the general re-greening of the {S}ahel. {T}his paper reviews and synthesizes the literature on the drivers of these paradoxical behaviors, focusing on recent works in the {W}est {A}frican {S}ahelo/{S}udanian strip, and upscaling the hydrological processes through an analysis of recent data from two representative areas of this region. {T}his paper helps better determine the respective roles played by {L}and {U}se/{L}and {C}over {C}hanges ({LULCC}), the evolution of rainfall intensity and the occurrence of extreme rainfall events in these hydrological paradoxes. {B}oth the literature review and recent data converge in indicating that the first {S}ahelian hydrological paradox was mostly driven by {LULCC}, while the second paradox has been caused by both {LULCC} and climate evolution, mainly the recent increase in rainfall intensity.}, keywords = {{S}ahel ; land use ; land cover changes ; water holding capacity ; climate change ; hydrological paradox ; re-greening ; {AFRIQUE} {DE} {L}'{OUEST} ; {SAHEL} ; {ZONE} {SOUDANOSAHELIENNE}}, booktitle = {}, journal = {{W}ater}, volume = {10}, numero = {6}, pages = {art. 748 [37 p.]}, ISSN = {2073-4441}, year = {2018}, DOI = {10.3390/w10060748}, URL = {https://www.documentation.ird.fr/hor/fdi:010073708}, }