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| High resolution topo-bathymetric and flow measurements and 2D-hydrodynamic numerical modelling to evaluate the effects of the deepening of the navigation channel in the Western Scheldt Plancke, Y.; Vertommen, D.; Beirinckx, K.; Vos, G. (2012). High resolution topo-bathymetric and flow measurements and 2D-hydrodynamic numerical modelling to evaluate the effects of the deepening of the navigation channel in the Western Scheldt, in: Dorst, L.L. et al. Taking Care of the Sea: conference handbook of Hydro12, 13-15 November 2012, SS Rotterdam, Rotterdam, the Netherlands. pp. 215-221
In: Dorst, L.L. et al. (2012). Taking Care of the Sea: conference handbook of Hydro12, 13-15 November 2012, SS Rotterdam, Rotterdam, the Netherlands. Hydrographic Society Benelux: Rotterdam. ISBN 978-90-365-3470-3. 356 pp.
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| Documenttype: Congresbijdrage | |
| Trefwoorden |
Environments > Aquatic environment > Marine environment Hydraulics and sediment > Hydrodynamics > Tides Hydraulics and sediment > Sediment > Dredging and dumping Literature and desktop study Measurement > Flow measurement Numerical modelling Numerical models Surveys > Hydrographic surveys > Bathymetric surveys Topographic features > Channels > Navigational channels ANE, Nederland, Westerschelde [Marine Regions] Marien/Kust |
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| Abstract |
To evaluate the success of this new disposal strategy an extensive monitoring programme was set up . Frequent (2-weekly up to two-monthly) topo-bathymetric surveys using multibeam echo sounding are performed in combination with seasonal sedimentation-erosion measurements using both RTK (intertidal) and singlebeam (subtidal). Also flow velocities on 10 transects, each consisting of 4 measurements points, in the shallow subtidal and the intertidal zone near the disposal locations are monitored using ADCP’s (Nortek – AquaDopp). The ADCP devices on the intertidal zone are dug in the sandbar and look upward, allowing maximal vertical resolution when flooded during the tidal cycle. Parallel with the monitoring, a validated 2D-numerical hydrodynamic model is used to evaluate the effects of the disposal of sediments. Every three months, a simulation is performed using the most recent topo-bathymetry. This allows an evaluation of the changes in flow velocities and flow patterns near the disposal areas. A special “protocol” (see Depreiter et al., 2012) with several criteria was developed to evaluate the monitoring results and the success of the new disposal strategy. |
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