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| Titel |
Role of beach morphology in wave overtopping hazard assessment |
| VerfasserIn |
Benjamin Phillips, Jennifer Brown, Jean-Raymond Bidlot, Andrew Plater |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250138667
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| Publikation (Nr.) |
 EGU/EGU2017-1761.pdf |
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| Zusammenfassung |
| Understanding the role of beach morphology in controlling wave overtopping volume will
further minimise uncertainties in flood risk assessments at coastal locations defended by
engineered structures worldwide. XBeach is used to model wave overtopping volume for a
1:200 yr joint probability distribution of waves and water levels with measured, pre- and
post-storm beach profiles. The simulation with measured bathymetry is repeated with and
without morphological evolution enabled during the modelled storm event. This research
assesses the role of morphology in controlling wave overtopping volumes for hazardous
events that meet the typical design level of coastal defence structures. Results show disabling
storm-driven morphology under-represents modelled wave overtopping volumes by up to
39% under high Hs conditions, and has a greater impact on the wave overtopping rate than
the variability applied within the boundary conditions due to the range of wave-water level
combinations that meet the 1:200 yr joint probability criterion. Accounting for
morphology in flood modelling is therefore critical for accurately predicting wave
overtopping volumes and the resulting flood hazard and to assess economic losses. |
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