基于EFDC的九龙江口-厦门湾三维潮流及盐度数值模拟研究

发布时间：2018-04-18 10:04

本文选题：九龙江口-厦门湾 + 潮流　；参考：《水动力学研究与进展A辑》2016年01期

【摘要】：环境流体动力学模型(EFDC)集水动力模块、泥沙输运模块、污染物运移模块和水质预测模块于一体,可以用于河流、湖泊、水库、湿地和近岸海域一维、二维和三维物理和化学过程的模拟。为了研究岛屿多、岸线地形及流态复杂的九龙江口-厦门湾水动力过程,该文将EFDC模型运用于该水域三维潮流及盐度场的数值模拟,对比实测资料校核了模型参数,利用实测潮位、流速和盐度数据对模拟结果进行了充分的验证,吻合度高。该水域属于规则半日潮类型,平均涨、落潮历时约6 h;潮流以往复流运动为主,表层流速最大可达2 m/s;低平潮前后出现面积合计约74 km2的多处露滩;发现河口区分层及不同类型的盐度锋现象均在低潮后1 h时最显著。结果表明,该模式成功复演了九龙江口-厦门湾潮汐潮流和盐度场的时空变化过程,适用于模拟和分析河口及近海海域的水动力场。
[Abstract]:The environmental hydrodynamic model (EFDC) is a hydrodynamic module, a sediment transport module, a pollutant transport module and a water quality prediction module. It can be used in one dimension of rivers, lakes, reservoirs, wetlands and coastal waters.Simulation of two-and three-dimensional physical and chemical processes.In order to study the hydrodynamic process of Jiulong River Estuary and Xiamen Bay with many islands and complicated coastline topography, the EFDC model is applied to the numerical simulation of three dimensional tidal current and salinity field in this water area, and the model parameters are verified by comparing the measured data.The simulation results are fully verified by the measured tidal level, velocity and salinity data.It belongs to the regular semi-diurnal tide type, the average rising and the falling tide lasting about 6 hours, the tidal current is mainly reciprocating current, the maximum velocity of surface velocity can be as high as 2 m / s, the area before and after the low tide is about 74 km2, and the total area before and after the low tide is about 74 km2.It is found that the stratification and the salinity front of different types in the estuary are most significant at 1 h after the low tide.The results show that the time-space variation process of tidal current and salinity field in Jiulong Estuary and Xiamen Bay has been successfully reconstructed by this model, which is suitable for simulating and analyzing hydrodynamic fields in estuaries and offshore waters.
【作者单位】：国家海洋局第三海洋研究所;
【基金】：国家自然科学基金项目(41406121) 国家海洋局第三海洋研究所基本科研业务专项(海三科2013031)~~
【分类号】：P731.2;P731.12

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