Articles | Volume 25, issue 6
Hydrol. Earth Syst. Sci., 25, 3691–3711, 2021
https://doi.org/10.5194/hess-25-3691-2021
Hydrol. Earth Syst. Sci., 25, 3691–3711, 2021
https://doi.org/10.5194/hess-25-3691-2021

Research article 30 Jun 2021

Research article | 30 Jun 2021

Time lags of nitrate, chloride, and tritium in streams assessed by dynamic groundwater flow tracking in a lowland landscape

Vince P. Kaandorp et al.

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Short summary
We reconstructed historical and present-day tritium, chloride, and nitrate concentrations in stream water of a catchment using land-use-based input curves and calculated travel times of groundwater. Parameters such as the unsaturated zone thickness, mean travel time, and input patterns determine time lags between inputs and in-stream concentrations. The timescale of the breakthrough of pollutants in streams is dependent on the location of pollution in a catchment.