Articles | Volume 18, issue 6
https://doi.org/10.5194/os-18-1725-2022
https://doi.org/10.5194/os-18-1725-2022
Research article
 | 
12 Dec 2022
Research article |  | 12 Dec 2022

Modelling the impact of anthropogenic measures on saltwater intrusion in the Weser estuary

Pia Kolb, Anna Zorndt, Hans Burchard, Ulf Gräwe, and Frank Kösters

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Cited articles

Andrews, S. W., Gross, E. S., and Hutton, P. H.: Modeling salt intrusion in the San Francisco Estuary prior to anthropogenic influence, Cont. Shelf Res., 146, 58–81, https://doi.org/10.1016/j.csr.2017.07.010, 2017. 
BAW: Mathematical Module SediMorph: Validation Document Version 1.1, Hamburg, https://wiki.baw.de/de/index.php/Mathematisches_Verfahren_SEDIMORPH (last access: 2 December 2022), 2005. 
BAW: Historical digital terrain model data of the Weser Estuary (HIWEST), B3955.02.04.70168-6, Federal Waterways Engineering and Research Institute [data set], https://doi.org/10.48437/02.2020.K2.5200.0001, 2020. 
BAW: Historical digital terrain models of the Weser Estuary (HIWEST). Technical Report B3955.02.04.70168-6, Federal Waterways Engineering and Research Institute, https://hdl.handle.net/20.500.11970/107521 (last access: 2 December 2022), 2021. 
Becherer, J., Flöser, G., Umlauf, L., and Burchard, H.: Estuarine circulation versus tidal pumping: Sediment transport in a well-mixed tidal inlet, J. Geophys. Res.-Oceans, 121, 6251–6270, https://doi.org/10.1002/2016JC011640, 2016. 
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Short summary
River engineering measures greatly changed tidal dynamics in the Weser estuary. We studied the effect on saltwater intrusion with numerical models. Our analysis shows that a deepening of the navigation channel causes saltwater to intrude further into the Weser estuary. This effect is mostly masked by the natural variability of river discharge. In our study, it proved essential to recalibrate individual hindcast models due to differences in sediments, bed forms, and underlying bathymetric data.