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Modeling of Coastal Erosion in Exposed and Groin-Protected Steep Beaches
| 题名： | Modeling of Coastal Erosion in Exposed and Groin-Protected Steep Beaches |
| 正文语种： | eng |
| 作者： | Juan L. Garzon;Oscar Ferreira;Theocharis A. Plomaritis |
| 作者单位： | Centre for Marine and Environmental Research FCT Universidade do Algarve Campus de Gambelas 8005-139 Faro Portugal;Centre for Marine and Environmental Research FCT Universidade do Algarve Campus de Gambelas 8005-139 Faro Portugal;Faculty of Marine and Environmental Science Dept. of Applied Physics Univ. of Cadiz Campus Rio San Pedro (CASEM) Puerto Real 11510 Cadiz Spain |
| 摘要： | Process-based models are suitable tools for reproducing storm-driven erosion. However, their performance has been mainly examined on mild-slope sandy beaches and their use on steep beaches still represents a challenge. Here, open-source process-based model XBeach experiments were combined with topographical measurements collected for two storms (16- and 5-year return period) to obtain a reliable model. The model parameters "facua" (parameterized wave asymmetry and skewness sediment transport component), "bermslope" (upslope transport term for semireflective beaches), and "wetslope" (critical avalanching submerged slope) were utilized for calibration and validation. The 16-year storm simulations on an exposed beach revealed that whether bermslope increased and "facua" must be reduced, and vice versa, to properly simulate erosion. Adding bermslope provided excellent results for these storms when using facua and wetslope values close to the recommended values. In a groin-protected site, XBeach was successfully calibrated and validated for the tested storms using these parameters, although with different values. These experiments demonstrated that the appropriate use of these parameters can satisfactorily simulate morphological changes on steep beaches for different hydrodynamic conditions and coastal settings (exposed and groin protected). |
| 出版年： | 2022 |
| 期刊名称： | Journal of Waterway, Port, Coastal and Ocean Engineering |
| 卷： | 148 |
| 期： | 6 |
| 页码： | 04022018.1-04022018.16 |
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