Tabsoba M. auteur aut IRD Hector Basile auteur aut IRD Cohard J. M. auteur aut IRD Vandervaere J. P. auteur aut IRD Warzagan A. I. auteur aut IRD Peugeot Christophe auteur aut IRD text journalArticle eng text/pdf reformatted digital access Study region: The study was conducted in the south-western Sahel of Niger, within a small experimental catchment of the AMMA-CATCH observatory characterized by degraded soils, short high-intensity rainfall events, and increasing implementation of sustainable land management (SLM) practices such as micro-dams. Study Focus: This study investigates the hydrological impacts of SLM practices on runoff generation, soil water storage, and groundwater recharge using the integrated hydrological model ParFlow-CLM combined with field observations. The model was first calibrated under preintervention conditions using event-based runoff observations. Micro-dams were then introduced using equivalent Manning roughness coefficients calibrated against observations to represent their hydraulic effects on a Sahelian hillslope. New hydrological insights for the region: Results show that the model reproduces the observed reduction in event-based runoff induced by SLM practices. Under the 8% managed-area scenario, corresponding to the 8% field implementation stage (0.64 ha over the modeled 8 ha hillslope), runoff coefficients decreased from 0.24 to 0.13 in observations and from 0.25 to 0.17 in simulations. Simulations also indicate enhanced infiltration and increased event-based soil water storage in the upper soil profile, reducing soil moisture stress during dry periods. Simulations suggest that hillslope-scale, diffuse groundwater recharge increased from about 15-17% of annual rainfall, while hillslope-scale runoff declined from 15% to 9%. These findings highlight the potential of SLM interventions to improve water availability and hydrological resilience in Sahelian environments. specialized Land degradation Sustainable Land Management Integrated hydrological modeling ParFlow-CLM Water balance Sahel NIGER ZONE SAHELIENNE 062 021 020 66 103633 [18 p.] 2026 https://www.documentation.ird.fr/hor/fdi:010097437 10.1016/j.ejrh.2026.103633 [F B010097437] https://www.documentation.ird.fr/hor/fdi:010097437 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2026-07/010097437.pdf IRD - Base Horizon / Pleins textes 2026-07-09 2026-07-09 fdi:010097437 fre