Sensitivity analysis of a morphodynamic modelling system applied to a coastal lagoon inlet
Sensitivity analysis of a morphodynamic modelling system applied to a coastal lagoon inlet
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DOI：
10.1007/s10236-010-0267-5
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发表时间：
2010-02
期刊：
影响因子：
2.3
通讯作者：
S. Plecha;P. Silva;N. Vaz;X. Bertin;Anabela Oliveira;A. Fortunato;J. Dias
中科院分区：
文献类型：
--
作者：
S. Plecha;P. Silva;N. Vaz;X. Bertin;Anabela Oliveira;A. Fortunato;J. Dias
这项工作调查了一个复杂的海岸系统(里亚德阿维罗拉戈湖，葡萄牙)入海口最近的形态变化。这项研究是利用地形动力学模拟系统MORSYS2D获得的水深数据分析和数值模拟进行的。目前的模拟只考虑了潮汐强迫，并通过调整用于计算泥沙输运的公式进行了敏感性分析。根据对该地区的调查，在数值模拟中考虑了埃维罗河入口处泥沙粒度的不均匀分布。对模型结果进行分析，以评估它们是否与根据水深数据计算的观察到的侵蚀和沉积趋势相似。在考虑不同泥沙输运公式的情况下，定量分析了3年来测量结果与数值计算结果之间的差异。结果表明，Ackers和White(1973)和Engelund和Hansen(1967)公式最能描述埃维罗河海湾由潮汐驱动的地形动力学变化。
This work investigates the recent morphological changes at the inlet of a complex coastal system (Ria de Aveirolagoon, 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 theRia de Aveiroinlet 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 theRia de Aveiroinlet.