Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches
Short-term beach morphodynamics are typically modelled solely through storm-induced erosion, disregarding post-storm recovery. Yet, the full cycle of beach profile response is critical to simulating and understanding morphodynamics over longer temporal scales. The XBeach model is calibrated using to...
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doaj-aaa32fc522d04b0ba066ef013d8ba1af2021-04-02T19:46:08ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-01-019868610.3390/jmse9010086Simulating Destructive and Constructive Morphodynamic Processes in Steep BeachesKaterina Kombiadou0Susana Costas1Dano Roelvink2CIMA–Centre for Marine and Environmental Research, FCT, Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, PortugalCIMA–Centre for Marine and Environmental Research, FCT, Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, PortugalWater Science and Engineering Department, IHE Delft institute for Water Education, Westvest 7, 2611 AX Delft, The NetherlandsShort-term beach morphodynamics are typically modelled solely through storm-induced erosion, disregarding post-storm recovery. Yet, the full cycle of beach profile response is critical to simulating and understanding morphodynamics over longer temporal scales. The XBeach model is calibrated using topographic profiles from a reflective beach (Faro Beach, in S. Portugal) during and after the incidence of a fierce storm (Emma) that impacted the area in early 2018. Recovery in all three profiles showed rapid steepening of the beachface and significant recovery of eroded volumes (68–92%) within 45 days after the storm, while berm heights reached 4.5–5 m. Two calibration parameters were used (<i>facua</i> and <i>bermslope</i>), considering two sets of values, one for erosive (Hm0 ≥ 3 m) and one for accretive (Hm0 < 3 m) conditions. A correction of the runup height underestimation by the model in surfbeat mode was necessary to reproduce the measured berm elevation and morphology during recovery. Simulated profiles effectively capture storm erosion, but also berm growth and gradual recovery of the profiles, showing good skill in all three profiles and recovery phases. These experiments will be the basis to formulate event-scale simulations using schematized wave forcing that will allow to calibrate the model for longer-term changes.https://www.mdpi.com/2077-1312/9/1/86morphodynamic modellingbeach recoveryXBeachsurfbeatbermbermslope |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Katerina Kombiadou Susana Costas Dano Roelvink |
spellingShingle |
Katerina Kombiadou Susana Costas Dano Roelvink Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches Journal of Marine Science and Engineering morphodynamic modelling beach recovery XBeach surfbeat berm bermslope |
author_facet |
Katerina Kombiadou Susana Costas Dano Roelvink |
author_sort |
Katerina Kombiadou |
title |
Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches |
title_short |
Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches |
title_full |
Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches |
title_fullStr |
Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches |
title_full_unstemmed |
Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches |
title_sort |
simulating destructive and constructive morphodynamic processes in steep beaches |
publisher |
MDPI AG |
series |
Journal of Marine Science and Engineering |
issn |
2077-1312 |
publishDate |
2021-01-01 |
description |
Short-term beach morphodynamics are typically modelled solely through storm-induced erosion, disregarding post-storm recovery. Yet, the full cycle of beach profile response is critical to simulating and understanding morphodynamics over longer temporal scales. The XBeach model is calibrated using topographic profiles from a reflective beach (Faro Beach, in S. Portugal) during and after the incidence of a fierce storm (Emma) that impacted the area in early 2018. Recovery in all three profiles showed rapid steepening of the beachface and significant recovery of eroded volumes (68–92%) within 45 days after the storm, while berm heights reached 4.5–5 m. Two calibration parameters were used (<i>facua</i> and <i>bermslope</i>), considering two sets of values, one for erosive (Hm0 ≥ 3 m) and one for accretive (Hm0 < 3 m) conditions. A correction of the runup height underestimation by the model in surfbeat mode was necessary to reproduce the measured berm elevation and morphology during recovery. Simulated profiles effectively capture storm erosion, but also berm growth and gradual recovery of the profiles, showing good skill in all three profiles and recovery phases. These experiments will be the basis to formulate event-scale simulations using schematized wave forcing that will allow to calibrate the model for longer-term changes. |
topic |
morphodynamic modelling beach recovery XBeach surfbeat berm bermslope |
url |
https://www.mdpi.com/2077-1312/9/1/86 |
work_keys_str_mv |
AT katerinakombiadou simulatingdestructiveandconstructivemorphodynamicprocessesinsteepbeaches AT susanacostas simulatingdestructiveandconstructivemorphodynamicprocessesinsteepbeaches AT danoroelvink simulatingdestructiveandconstructivemorphodynamicprocessesinsteepbeaches |
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