Tidal dynamics in the sand motor lagoon

Tidal dynamics in the sand motor lagoon

De Vries, S.
Radermacher, M.
De Schipper, M.A.
Stive, M.J.F.

Civil Engineering and Geosciences

Hydraulic Engineering

2015-06-28

The Sand Motor is a mega-nourishment characterized by a very large sand volume of around 20 million m3 placed along the Dutch coast. The Sand Motor is a pilot project to evaluate the performance of an alternative nourishment strategy with respect to different functions of the coastal system. Within the scope of the coastal functions, the hook-shaped design of the initial morphology of the Sand Motor involves a sheltered (man-made) lagoon. The morphology of the Sand Motor and particularly the area around the lagoon entrance has changed over time since the construction in 2011. As a result of the changing inlet and lagoon morphology, the tidal conditions inside the basin have changed. We have set up a detailed numerical model to simulate the hydrodynamic conditions inside the Sand Motor’s tidal lagoon as a function of the water level at sea and the measured local morphology of the Sand Motor. It is found that the tidal response inside the lagoon changes significantly as a function of the changing morphology. The analysis reveals a prediction of the temporal development of the tidal range and mean water level inside the lagoon, which can be used to predict the closure of the Sand Motor lagoon.

sand motor
Delft3D
lagoon
tide

http://resolver.tudelft.nl/uuid:e49d8911-72c2-4f6c-a8b4-7009954134c0

IAHR

E-proceedings of the 36th IAHR World Congress, The Hague, the Netherlands, 28 June-3 July 2015

Institutional Repository

conference paper

(c) 2015 The Author(s)