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Sensitivity analysis of a morphodynamic modelling system applied to a coastal lagoon inlet

机译：应用于沿海泻湖入口的形态动力学建模系统的敏感性分析

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摘要

This work investigates the recent morphological changes at the inlet of a complex coastal system (Ria de Aveiro lagoon, Portugal). This study was carried out using bathymetric data analysis and numerical simulations obtained with the 2DH morphodynamic modelling system MORSYS2D. The present simulations considered only tidal forcing, and a sensitivity analysis was performed by tuning the formula used to compute the sediment transports. A non-uniform sediment grain size distribution for the Ria de Aveiro inlet is considered in the numerical simulations, based on surveys performed in this area. The model results are analysed to assess if they resemble the observed trends of erosion and deposition, as calculated from bathymetric data. A quantitative analysis of the differences between the bathymetric changes obtained through surveys and the numerical results over a period of 3 years considering different sediment transport formulations shows that the formulations of Ackers and White (1973) and Engelund and Hansen (1967) are the ones that best describe the morphodynamic changes driven by tides in the Ria de Aveiro inlet.
机译：这项工作调查了复杂的沿海系统（Ria de Aveiro泻湖，葡萄牙）入口处最近的形态变化。这项研究是使用2DH形态动力学建模系统MORSYS2D进行的测深数据分析和数值模拟进行的。本模拟仅考虑了潮汐强迫，并通过调整用于计算沉积物迁移的公式来进行敏感性分析。基于在该地区进行的调查，在数值模拟中考虑了Ria de Aveiro入口的沉积物粒度分布不均匀。对模型结果进行分析，以评估它们是否类似于根据测深数据计算得出的侵蚀和沉积趋势。定量分析通过调查获得的测深变化与考虑了不同泥沙输运公式的三年期间数值结果之间的差异，结果表明，Ackers和White（1973）以及Engelund和Hansen（1967）的公式是最能描述Ria de Aveiro入口潮汐驱动的形态动力学变化。

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  • 来源
    《Ocean Dynamics》 |2010年第2期|p.275-284|共10页
  • 作者

    Sandra Plecha; Paulo A. Silva; Nuno Vaz; Xavier Bertin; Anabela Oliveira; Andre B. Fortunato; Joao M. Dias;

  • 作者单位

    CESAM, Departamento de Fisica, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;

    CESAM, Departamento de Fisica, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;

    CESAM, Departamento de Fisica, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;

    Departamento de Hidraulica e Ambiente, LNEC - Laboratorio Nacional de Engenharia Civil, 1700-066 Lisbon, Portugal;

    Departamento de Hidraulica e Ambiente, LNEC - Laboratorio Nacional de Engenharia Civil, 1700-066 Lisbon, Portugal;

    Departamento de Hidraulica e Ambiente, LNEC - Laboratorio Nacional de Engenharia Civil, 1700-066 Lisbon, Portugal;

    CESAM, Departamento de Fisica, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;

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  • 正文语种 eng
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  • 关键词

    morphodynamics; sensitivity analysis; tidal inlet; aveiro lagoon;

    机译：形态动力学敏感性分析;潮气入口阿威罗泻湖;

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