Publications des scientifiques de l'IRD

Descroix Luc, Guichard F., Grippa M., Lambert L. A., Panthou G., Mahé Gil, Gal Laëtitia, Dardel C., Quantin Guillaume, Kergoat L., Bouaita Yasmin, Hiernaux P., Vischel T., Pellarin T., Faty B., Wilcox C., Malam Abdou M., Mamadou I., Vandervaere J. P., Diongue-Niang A., Ndiaye O., Sane Y., Dacosta H., Gosset Marielle, Casse Claire, Sultan Benjamin, Barry A., Amogu O., Nka Nnomo B., Barry A., Paturel Jean-Emmanuel. (2018). Evolution of surface hydrology in the Sahelo-Sudanian strip : an updated review. Water, 10 (6), p. art. 748 [37 p.]. ISSN 2073-4441.

Titre du document
Evolution of surface hydrology in the Sahelo-Sudanian strip : an updated review
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000436515100079
Auteurs
Descroix Luc, Guichard F., Grippa M., Lambert L. A., Panthou G., Mahé Gil, Gal Laëtitia, Dardel C., Quantin Guillaume, Kergoat L., Bouaita Yasmin, Hiernaux P., Vischel T., Pellarin T., Faty B., Wilcox C., Malam Abdou M., Mamadou I., Vandervaere J. P., Diongue-Niang A., Ndiaye O., Sane Y., Dacosta H., Gosset Marielle, Casse Claire, Sultan Benjamin, Barry A., Amogu O., Nka Nnomo B., Barry A., Paturel Jean-Emmanuel
Source
Water, 2018, 10 (6), p. art. 748 [37 p.] ISSN 2073-4441
In the West African Sahel, two paradoxical hydrological behaviors have occurred during the last five decades. The first paradox was observed during the 1968-1990s Great Drought' period, during which runoff significantly increased. The 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 Sahel. This paper reviews and synthesizes the literature on the drivers of these paradoxical behaviors, focusing on recent works in the West African Sahelo/Sudanian strip, and upscaling the hydrological processes through an analysis of recent data from two representative areas of this region. This paper helps better determine the respective roles played by Land Use/Land Cover Changes (LULCC), the evolution of rainfall intensity and the occurrence of extreme rainfall events in these hydrological paradoxes. Both the literature review and recent data converge in indicating that the first Sahelian 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.
Plan de classement
Sciences du milieu [021] ; Hydrologie [062] ; Pédologie [068] ; Etudes, transformation, conservation du milieu naturel [082] ; Télédétection [126]
Description Géographique
AFRIQUE DE L'OUEST ; SAHEL ; ZONE SOUDANOSAHELIENNE
Localisation
Fonds IRD [F B010073708]
Identifiant IRD
fdi:010073708
Contact