Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Journal of Hydrology : Regional Studies 103633 [18 p.] Land degradation Sustainable Land Management Integrated hydrological modeling ParFlow-CLM Water balance Sahel NIGER ZONE SAHELIENNE 2026 fdi:010097437 ENG Journal of Hydrology : Regional Studies ISI:001798200700001 10.1016/j.ejrh.2026.103633 https://www.documentation.ird.fr/hor/fdi:010097437 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2026-07/010097437.pdf 66 Horizon (IRD) 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. 062 ; 021 ; 020 UR050 Bénin