Articles | Volume 29, issue 21 
            
                
                    
            
            
            https://doi.org/10.5194/hess-29-5893-2025
                    © Author(s) 2025. This work is distributed under 
the Creative Commons Attribution 4.0 License.
                the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-5893-2025
                    © Author(s) 2025. This work is distributed under 
the Creative Commons Attribution 4.0 License.
                the Creative Commons Attribution 4.0 License.
Towards efficient management of riverbank filtration sites: new insights on river–groundwater interactions from environmental tracers and high-resolution monitoring
Krzysztof Janik
CORRESPONDING AUTHOR
                                            
                                    
                                            Institute of Earth Sciences, Faculty of Natural Sciences, University of Silesia in Katowice, Będzińska Str. 60, 41-200 Sosnowiec, Poland
                                        
                                    Arno Rein
                                            Chair of Hydrogeology, TUM School of Engineering and Design, Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany
                                        
                                    Sławomir Sitek
                                            Institute of Earth Sciences, Faculty of Natural Sciences, University of Silesia in Katowice, Będzińska Str. 60, 41-200 Sosnowiec, Poland
                                        
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Anne Imig, Francesca Perosa, Carolina Iwane Hotta, Sophia Klausner, Kristen Welsh, Yan Zheng, and Arno Rein
                                    Hydrol. Earth Syst. Sci., 28, 5459–5478, https://doi.org/10.5194/hess-28-5459-2024, https://doi.org/10.5194/hess-28-5459-2024, 2024
                                    Short summary
                                    Short summary
                                            
                                                In 2019, Hurricane Dorian led to salinization of groundwater resources on the island of Grand Bahama. We assessed the feasibility of managed aquifer recharge (MAR) for restoring fresh groundwater. Furthermore, we applied a financial and an extended cost–benefit analysis for assessing ecosystem services supported by MAR and reforestation. As a first estimate, MAR could only provide a small contribution to the water demand. Reforestation measures were assessed to be financially profitable.
                                            
                                            
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                Short summary
            We studied how river water and groundwater mix beneath Tarnów, Poland, by tracking natural physicochemical “fingerprints” in water over a year. Our study shows that the Dunajec River is the main recharge source for the underground reservoir, supplying drinking water to nearly 270,000 people. We present a cost-effective, transferable workflow to trace groundwater origins and flow speed, which promotes sustainable water supply management and ensures faster responses to potential pollution.
            We studied how river water and groundwater mix beneath Tarnów, Poland, by tracking natural...