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Numerical Modeling of Flow and Bed Evolution of Bichromatic Wave Groups on an Intermediate Beach Using Nonhydrostatic XBeach
| 题名： | Numerical Modeling of Flow and Bed Evolution of Bichromatic Wave Groups on an Intermediate Beach Using Nonhydrostatic XBeach |
| 正文语种： | 英文 |
| 作者： | Gioele Ruffini;Riccardo Briganti;Jose M. Alsina;Maurizio Brocchini;Nicholas Dodd;Robert McCall |
| 作者单位： | Environmental Fluid Mechanics and Geoprocesses Research Group, Faculty of Engineering, Univ;Laboratori d'Enginyeria Marftima, Universitat Politecnica de Catalunya;Dept, of Civil and Building Engineering and Architecture, University Politecnica delle Marche;Coastal Dynamics and Engineering Group, Nottingham Transport Engineering Centre, Faculty of Engineering, Univ; Dept, of Marine and Coastal Systems, Del tares |
| 摘要： | This paper analyzes the modeling of the hydro- and morphodynamics of bichromatic wave groups on an intermediate beach with an initial 1:15 slope. The nonhydrostatic version of XBeach was used to simulate two incident wave conditions of the experiments carried out within the HYDRALAB-IV Coupled High Frequency Measurement of Swash Sediment Transport and Morphodynamic (CoSSedM) project. The chosen forcing conditions have different strengths of swash-swash interaction. A procedure was developed to generate boundary con-ditions for the model that are able to fully account for both the bound and free long waves measured during the experiments. Using the normalized root-mean-squared error as a measure, this paper finds a higher accuracy of the nonhydrostatic version of XBeach in simulating swash-swash interaction from the hydrodynamics point of view, and worse performances in capturing the details of intragroup sediment transport. Nevertheless, the model is able to distinguish the relative difference in offshore swash sediment transport among different types of swash-swash interaction, and it is overall more successful in simulating beach morphodynamics when the swash sediment transport is of the same order of magnitude as the surf zone one. |
| 出版日期： | 2020.01-02 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| 卷： | Vol.146 |
| 期： | No.01 |
| 页码： | 04019034 |
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