Articles | Volume 385
https://doi.org/10.5194/piahs-385-135-2024
https://doi.org/10.5194/piahs-385-135-2024
Post-conference publication
 | 
18 Apr 2024
Post-conference publication |  | 18 Apr 2024

Tracing and hydraulic modelling to assess the hydraulic performance of a constructed wetland

Bruno J. Lemaire, Cédric Chaumont, Julien Tournebize, and Hocine Henine

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This preprint is open for discussion and under review for Hydrology and Earth System Sciences (HESS).
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Cited articles

Adamsson, Å., Bergdahl, L., and Lyngfelt, S.: Measurement and three-dimensional simulation of flow in a rectangular detention tank, Urban Water J., 2, 277–287, https://doi.org/10.1080/15730620500386545, 2005. 
Arcement, G. J. and Schneider, V. R.: Guide for selecting Manning's roughness coefficients for natural channels and flood plains, US geological survey, 38 p., https://doi.org/10.3133/wsp2339, 1989. 
Bulat, M., Biron, P. M., Lacey, J. R. W., Botrel, M., Hudon, C., and Maranger, R.: A three-dimensional numerical model investigation of the impact of submerged macrophytes on flow dynamics in a large fluvial lake, Freshwater Biol., 64, 1627–1642, https://doi.org/10.1111/fwb.13359, 2019. 
Chaumont, C.: Tracing Experiment Rampillon RWT 2016 [data set], Data INRAE, https://doi.org/10.57745/CLNZYQ, 2022. 
Deltares: Delft3D-Flow [code] User Manual, Deltares, 725, https://content.oss.deltares.nl/delft3d4/Delft3D-FLOW_User_Manual.pdf (last access: 1 September 2022), 2014. 
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Short summary
The potential of constructed wetland to remove nitrate and pesticides increases with the residence time. The aim of this work is to investigate how the hydraulic performance changes with the flow rate in a party vegetated wetland, using the 3D hydrodynamic model. It was calibrated on continuous outflow concentration and tracing experiment. The simulation matched satisfactorily with observation. Results showed a limited increase of the hydraulic performance with the flow rate.
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