南黄海辐射沙脊群海域三维水动力数值模拟  

Three-dimensional hydrodynamic modeling in radial sand ridgea rea of the South Yellow Sea

作　　者：林伟波 陈晓燕 LIN Wei-bo;CHEN Xiao-yan(Tidal Flat Research Center of Jiangsu Province,Nanjing 210036,China)

机构地区：[1]江苏省海涂研究中心,江苏南京210036

出　　处：《水运工程》2020年第9期25-32,39,共9页Port & Waterway Engineering

基　　金：国家重点研发计划项目(2018YFC0407504);江苏省省级海洋科技创新专项(HY2018-1、HY2017-2)。

摘　　要：基于无规则网格的有限体积海岸海洋模型(FVCOM),建立适用于辐射沙脊群海域的三维潮流数学模型。为了更好地贴合不规则海岸边界,平面采用三角形网格剖分,垂向采用σ坐标进行模拟。结果表明,模型的计算值与观测值吻合良好,较好地反映了研究海域流场的时空分布特征。整个海域流场由南、北两股潮流向弶港辐聚辐散,各深槽流速较大而集中,流向与深槽走向十分一致;弶港以北,表、底层余流方向都是从南到北的沿岸流,南部海域的近岸余流有逆时针的旋转流,近深槽余流大都指向深槽。We establish a compatible three-dimensional tidal flow model in radial sand ridge area based on the unstructured grid finite volume coastal ocean model( FVCOM). In order to make it better fit the complex irregular coastline boundary,we adopt triangle mesh in the horizontal direction,and apply the σ-coordinate in the vertical to simulate. The results show the simulated values are consistent with the observed values,and the model is better to simulate the spatial and temporal distribution of the tidal flow in radial sand ridge. The whole current field is dominated by north and south tides,and they converge and diverge towards Jianggang. The velocity of deep groove is large and concentrated,and the flow direction is consistent with the trend of deep groove. The direction of surface and bottom residual current in the north of Jianggang is coastal current from south to north. The coastal residual current in the south sea area is counterclockwise rotating current,and the residual current near the deep groove mostly directs to the deep groove.

关 键 词：河流与海岸动力学 三维水动力模型 辐射沙脊群 有限体积 

分 类 号：TV211.15[水利工程—水文学及水资源] U612.23[交通运输工程—船舶及航道工程]