Dune erosion during storm surges
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Keywords |
Surges > Surface water waves > Storm surges Transport > Sediment transport > Mass gravity transport (sediments) > Slumping
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Author keywords |
Dune erosion; Field observations; collision regime; Suspended sediment concentration; Avalanching |
Abstract |
Dunes often act as the primary line of defence for low-lying hinterland against storm surges with dune erosion in the swash-dune collision regime. However, not all physical processes are currently fully understood, complicating accurate reproductions in models and the risk assessment of areas protected by dunes. This dissertation aims to study two such physical processes that are relevant to dune erosion during storm surges in the swash-dune collision regime. The first process is the suspension of sediments in the inner surf zone. The second process studied is sediment transport due to soil instabilities, i.e. the slumping (or avalanching) of sediments from the dune face. To study both processes, a prototype scale field experiment was conducted in the winter of 2021-2022. |
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