Articles | Volume 29, issue 21
https://doi.org/10.5194/hess-29-5893-2025
https://doi.org/10.5194/hess-29-5893-2025
Research article
 | 
03 Nov 2025
Research article |  | 03 Nov 2025

Towards efficient management of riverbank filtration sites: new insights on river–groundwater interactions from environmental tracers and high-resolution monitoring

Krzysztof Janik, Arno Rein, and Sławomir Sitek

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Cited articles

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Araguás-Araguás, L., Froehlich, K., and Różański, K.: Deuterium and oxygen-18 isotope composition of precipitation and atmospheric moisture, Hydrol. Process., 14, 1341–1355, https://doi.org/10.1002/1099-1085(20000615)14:8<1341::AID-HYP983>3.0.CO;2-Z, 2000. 
Bartak, R. and Grischek, T.: Groundwater Abstraction through Siphon Wells – Hydraulic Design and Energy Savings, Water, 10, 570, https://doi.org/10.3390/w10050570, 2018. 
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Bekele, E., Patterson, B., Toze, S., Furness, A., Higginson, S., and Shackleton, M.: Aquifer residence times for recycled water estimated using chemical tracers and the propagation of temperature signals at a managed aquifer recharge site in Australia, Hydrogeol. J., 22, 1383–1401, https://doi.org/10.1007/s10040-014-1142-0, 2014. 
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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.
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