Een geïntegreerde aanpak voor de Durme: Set-up and calibration of a detailed Durme model
Nguyen, D.; Vanlede, J.; Meire, D. (2024). Een geïntegreerde aanpak voor de Durme: Set-up and calibration of a detailed Durme model. Version 4.0. FH reports, 19_016_3. Flanders Hydraulics: Antwerp. VII, 54 + 15 p. app. pp.
De Vlaamse Waterweg (DVW) wants to evolve from the current management of the Durme to a more sustainable management. Two problems are identified. First of all the tidal channel is characterized by a continuous sedimentation. Secondly, a combination of spring or storm tide with intense rainfall leads to too high water levels (with increased inundation risks), both in the tidal and non-tidal part of the Durme. Within the framework of the actualised Sigmaplan, important management works in the Durme valley are foreseen. In the near future, several areas will be depoldered (Groot Broek and Klein Broek) and a controlled reduced tide area is built (De Bunt). Next to the extent of the river valley the problems in the river channel itself are also tackled, by carrying out important dredging work, to counteract the sedimentation. To assess the impact of the different measures within the Sigmaplan on the hydrodynamics and sediment dynamics of the Durme area, it is necessary to construct a numerical model that has a high resolution to capture well the area dynamics. In this project, a new and detailed hydrodynamic model was set up for the Durme area in the Telemac software. This model covers the whole tidal Durme valley and extents in the Zeeschelde from Sint-Amands till Temse. The model has been calibrated with the available water levels in the Durme and Schelde, and also a few available measurements of velocity. Both situations before and after the dredging works were considered in the calibration setup. The calibrated model will be used to assess the impact of (potential) management works on the system behaviour.
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