EBB-tidal delta morphology in response to a storm surge barrier

Conference paper (2013)
Department
Hydraulic Engineering (CEG) (TU Delft)
Copyright: © 2013 The Authors
Eastern Scheldt Tidal inlet Morphodynamics Ebb-tidal delta Storm surge barrier
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Published Date

24-06-2013

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Source:

Coastal Dynamics 2013: 7th International Conference on Coastal Dynamics, Arcachon, France, 24-28 June 2013

Faculty

Civil Engineering and Geosciences

Department

Hydraulic Engineering

Abstract

The ebb-tidal delta of the Eastern Scheldt tidal inlet has been under the influence of a storm surge barrier for the past 25 years. This barrier caused a strong decrease in average tidal currents through the inlet. The morphological response of the ebb-tidal delta is characterized by several different processes: (1) an overall decrease in sediment volume and morphological activity, (2) downdrift reorientation of channels and shoals, (3) a redistribution of sediment between channels and shoals, and (4) a lack of sediment exchange with the basin. Simulations with a process-based model show that the reorientation is a result of changed balance between cross-shore and alongshore tidal currents. The sediment volume decrease is a result of decreased tidal currents in combination with wind waves and a lack of sediment supply.

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