Low flows in the Meuse Basin and the potential for mitigating low flow events : technical report

The project focuses on investigating the potential of Nature-based Solutions (NbS) to mitigate low flows in the Meuse River Basin. Streamflow data analysis was combined with hydrological modelling and stakeholder engagement to understand low-flow conditions, the influence of human activities, and the opportunities to improve water retention through measures. A joint modelling framework was developed for the project, with Deltares leading the hydrological modelling using the WFLOW-SBM model. Results show that NbS have a meaningful potential in mitigating low flows in the Meuse Basin. The “Highest potential” strategy, which applies the most effective measures across all suitable areas led to an average increase in discharge of +9.23 m³/s at Borgharen. The second strategy, based on stakeholder preferences, resulted in a smaller but still positive increase of +0.57 m³/s. Understanding these options supports informed decision-making to strengthen low-flow resilience in the basin.