Françoise Guichard
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Françoise Guichard has a total of 30 co-authors. Here are the top co-authors by number of shared publications:
- Aliou Barry
Direction Nationale de l’Hydraulique, Conakry 001, Guinea
1 shared publication - Alseny Barry
MEEF Ministère de l’Environnement des Eaux et Forêts/Ministry of Environment, Water and Forests, BP 761, 999049 Conakry, Guinea
1 shared publication - Aïda Diongue Niang
Agence Nationale de l’Aviation Civile et de la Météorologie (ANACIM), BP 8184, 18524 Dakar, Senegal
1 shared publication - Bakary Faty
Direction de la Gestion et de la Planification des Ressources en Eau (DGPRE), Dakar 12500, Senegal
1 shared publication - Benjamin Sultan
ESPACE‐DEV, Univ Montpellier, IRD, Univ Guyane, Univ Reunion, Univ Antilles, Univ Avignon Maison de la Télédétection Montpellier France
1 shared publication - Bernadette Nka Nnomo
International Joint Laboratory DYCOFAC, IRGM-UY1-IRD, Yaounde P.O. Box 4110, Cameroon
1 shared publication
Latest Publications
- Open Access
Evolution of Surface Hydrology in the Sahelo-Sudanian Strip: An Updated Review
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.
Open AccessEvolution of Surface Hydrology in the Sahelo-Sudanian Strip: An Updated Review
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.