非结构网格模型在围海堤线方案比选中的应用

Application of unstructured network model in scheme comparison and selection of sea levee line

利用非结构网格模型FVCOM,对比分析了杭州湾北岸某围海工程各堤线方案对工程水域的影响。结果表明:非结构网格潮流数学模型能较准确模拟复杂岸线强潮海湾的潮流;合理的围海工程堤线方案可有效减小围海工程对水域水动力、海床冲淤的影响程度及影响范围;基于FVCOM的非结构网格潮流数学模型对于复杂的岸线和工程围堤线的适应性较好,且可无限加密。研究结果为围海工程堤线方案的选择及优化提供了一定的科学依据。

The influences of different levee lines of a sea reclamation works in the north bank of Hangzhou Bay on construction water zone were compared and analyzed by unstructured network model of FVCOM. The comparison and analysis results show that unstructured network tidal mathematical model can accurately simulate tidal current in strong tide bay with complicated hank line; reasonable reclamation line can effectively reduce the influence degree and scope of flow dynamic and scouring - silting of sea bed; FVCOM -based unstructured network tidal mathematical model adapts well to complicated bank line and reclamation line and the grid can be refined infinitely. The research results provide some scientific basis for levee line optimization and selection of the reclamation works.