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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Modelling scour and deposition in harbours due to complex tsunami-induced currents
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Modelling scour and deposition in harbours due to complex tsunami-induced currents

机译：由于复杂的海啸诱导的电流，在港口沉积和沉积建模

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In this paper, a set of models responsible for hydrodynamics, sediment transport, and morphological evolution are introduced with their theoretical backgrounds, and it is explained how they are fully connected through a two-way coupling to yield an integrated sediment transport model applicable to tsunami cases. In particular, a fully nonlinear Boussinesq model with bottom shear-induced rotational terms is chosen for the hydrodynamic model in order to provide a better physical approximation of tsunami-related, near-bed hydrodynamics in the nearshore. A finite-volume scheme, stable and suitable for phase-resolving model runs longer than 10 simulated hours, is adopted in the numerical discretization. The accuracy and applicability of the developed model are investigated through numerical tests on various sediment problems in the shallow region. Calculated results agree well with existing experimental records. Finally, an ocean-wide, field-scale simulation of the 2011 Tohoku-oki tsunami is attempted, with a focus on the localized effects of tsunami-induced morphological changes at Crescent City Harbor and Santa Cruz Harbor (USA). Consistent with the reported observations, strong and vortical velocity fields are generated through the model and result in significant changes in morphological configurations. Depth variations and areas of scouring and deposition are compared between modelled and observed records, and the results are discussed. (c) 2019 John Wiley & Sons, Ltd.
机译：本文在本文中，通过其理论背景引入了负责流体动力学，沉积物和形态演化的一组模型，并通过双向耦合说明它们如何完全连接，以产生适用于海啸的综合沉积物运输模型案例。特别地，为流体动力学模型选择具有底部剪切诱导的旋转术语的完全非线性BoussinesQ模型，以便提供近岸海啸相关的近床流体动力学的更好物理近似。在数值离散化中采用有限体积方案，稳定，适用于相位分辨率的相位拆分模型，采用长度超过10小时。通过数值试验研究了开发模型的准确性和适用性，对浅层区各种沉积物问题进行了数值测试。计算结果与现有的实验记录完全吻合良好。最后，尝试了2011年Tohoku-oki海啸的海洋，现场规模模拟，重点是海啸城市港口和圣克鲁斯港（美国）的海啸诱导的形态变化的局部影响。与报告的观察结果一致，通过模型产生强大和涡流场，并导致形态配置的显着变化。在建模和观察的记录之间比较深度变化和擦除和沉积区域，并讨论结果。 （c）2019 John Wiley＆Sons，Ltd。

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