A dike–groyne algorithm in a terrain-following coordinate ocean model (FVCOM): Development, validation and application
A dike–groyne algorithm in a terrain-following coordinate ocean model (FVCOM): Development, validation and application
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DOI：
10.1016/j.ocemod.2012.01.006
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发表时间：
2012
期刊：
影响因子：
3.2
通讯作者：
J. Ge;Changsheng Chen;J. Qi;P. Ding;R. Beardsley
中科院分区：
文献类型：
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作者：
J. Ge;Changsheng Chen;J. Qi;P. Ding;R. Beardsley
开发了堤坝-丁坝模型，并将其应用于非结构网格、三维原始方程有限体积近岸海洋模型(FVCOM)中，以研究近岸人工建筑周围的水动力问题。非结构网格有限体积通量离散算法使得该模块能够在地形跟随坐标系中逼真地包含上柱自由交换、下柱固体阻塞的窄宽堤坝和丁坝。该模块中使用的这种算法在理想情况下得到了验证，包括露头和/或淹没的堤坝以及沿海海堤，在这些海堤上可以进行解析解或实验室实验进行比较。以长江口为例，在东中国海内陆架深水航道建造了堤坝-丁坝结构。在给定的初始条件和边界条件下，在相同的强迫驱动下，通过观测对模型预测的水流和盐度进行了比较，比较了堤坝-丁坝和河床-顺应式坡度算法。结果表明，该方法对堤坝-丁坝结构上、下水流输运具有较高的分辨率，计算结果更为准确。这种MPI结构的并行堤坝-丁坝模块的FVCOM为具有堤防、海堤和/或大坝结构的沿海地区的海洋工程和淹没应用提供了一种新的工具。
A dike–groyne module is developed and implemented into the unstructured-grid, three-dimensional primitive equation finite-volume coastal ocean model (FVCOM) for the study of the hydrodynamics around human-made construction in the coastal area. The unstructured-grid finite-volume flux discrete algorithm makes this module capable of realistically including narrow-width dikes and groynes with free exchange in the upper column and solid blocking in the lower column in a terrain-following coordinate system. This algorithm used in the module is validated for idealized cases with emerged and/or submerged dikes and a coastal seawall where either analytical solutions or laboratory experiments are available for comparison. As an example, this module is applied to the Changjiang Estuary where a dike–groyne structure was constructed in the Deep Waterway channel in the inner shelf of the East China Sea (ECS). Driven by the same forcing under given initial and boundary conditions, a comparison was made for model-predicted flow and salinity via observations between dike–groyne and bed-conforming slope algorithms. The results show that with realistic resolution of water transport above and below the dike–groyne structures, the new method provides more accurate results. FVCOM with this MPI-architecture parallelized dike–groyne module provides a new tool for ocean engineering and inundation applications in coastal regions with dike, seawall and/or dam structures.