Dune erosion during storm surges

The realdune/reflex experiment at the sand engine

Conference paper (2022)

Authors

P.P.J. van Wiechen Coastal Engineering - CEG
J. Rutten Environmental Fluid Mechanics - CEG
Ryan Mieras University of North Carolina Wilmington
Katherine Anarde North Carolina State University
Magda Wrobel North Carolina State University
M.F.S. Tissier Environmental Fluid Mechanics - CEG
S. de Vries Coastal Engineering - CEG
Research Group
Coastal Engineering (CEG) (TU Delft)
Copyright: © 2022 P.P.J. van Wiechen, J. Rutten, Ryan Mieras, Katherine Anarde, Magda Wrobel, M.F.S. Tissier, S. de Vries
Marine Coastal
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Published Date

2022

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Hydraulic Engineering

Research Group

Coastal Engineering

Abstract

Storm conditions can lead to excessive dune erosion with potential floods as a consequence. Barrier islands and low-lying countries protected by dunes are especially vulnerable to dune erosion. To properly assess the risks these areas face, a clear understanding of the physical processes during dune erosion is required.

An international field experiment was conducted to study dune erosion during storm surges from November 6 2021 until January 6 2022. on the Sand Engine. During the Realdune/Reflex experiment, two prototype un-vegetated dunes of 5.5 m high and 150 m long were built just above the high waterline. Due to a different shoreline orientation and nearshore bathymetry, these dunes eroded differently during moderate storm conditions. 3 storms were captured during the campaign.

This abstract presents preliminary results of morphodynamic change during these 3 storms, by means of profile changes and erosion volumes.