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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Sand dune breaching along the emilia-romagna littoral zone: a deterministic approach
Sand dune breaching along the emilia-romagna littoral zone: a deterministic approach
n conditions cause proportioned wave run-up and load on sand dunes which potentially trigger the
formation of a fast growing dune breach leading to coastal flooding. The objective of this study is to investigate
deterministically how and to what extent waves trigger and drive breaching of sand dunes. The selected study area is
Emilia-Romagna (Italy) where these processes were investigated in detail with focus on wave impact, when lateral
erosion (alongshore) occurs leading to breaching of the dune systems. Spatial and temporal high-resolution numerical
simulations using the XBeach morphological model were carried out to study wave run up, overtopping and breaching of
sand dunes along a representative reach of Emilia-Romagna coastal dunes. Unlike previous studies, XBeach was set up
in 2D mode using the built-in non-hydrostatic module in order to model the dispersive waves with high accuracy. This
allows to investigate the alongshore evolution of the breach, triggered by wave run-up on the seaward slope. Run-up
values obtained with XBeach are consistent with results od SWASH simulations used for comparison. Validation against
experimental data, for run-up and discharge rates, is under preparation.Form Required :
File Size : 1,196,016 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 20/08/2015
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