基于FVCOM的虎门水道盐水入侵三维数值模拟

发布时间：2017-12-26 19:45

本文关键词：基于FVCOM的虎门水道盐水入侵三维数值模拟　出处：《热带海洋学报》2016年02期 　论文类型：期刊论文

【摘要】：采用不规则网格有限体积近岸海洋三维模型FVCOM(finite volume coastal ocean model),对2001年虎门水道至伶仃洋的盐水入侵现象进行数值模拟,并采用多个站的实测潮位、盐度对模型进行了率定和验证,然后对其水动力特性、盐度的时空变化规律及其垂向分层现象进行分析。结果表明,水位的模型预测值与实测值之间的相关系数达到0.93以上,绝对平均误差小于0.1m;盐度模拟的相对误差能控制在10%以内;大虎站表底层的流向较为一致,盐度表现出明显的分层现象;而漳澎站多次出现表底层流向相反的情况,盐度的垂向混合较充分;文章构建的模型能够较好地模拟盐水入侵的最大距离,虎门水道大潮时入侵距离和强度均大于小潮时,盐水楔活动受潮流强弱变化影响显著。
[Abstract]:The 3D model of irregular grid finite volume FVCOM (finite volume coastal marine ocean model), the phenomenon of saltwater intrusion in Humen on 2001 to channel Lingdingyang was simulated, and the plurality of measured water level and salinity of the station by calibration and verification of the model, then the temporal variation of the dynamic characteristics of water and salinity and the vertical stratification analysis. The results show that the water level prediction model of the value of the correlation coefficient between the measured value and reached more than 0.93, the average absolute error is less than 0.1M; the relative error of the simulated salinity can be controlled within 10%; the bottom of the table to Dahu station is similar to that of salinity showed obvious stratification; and Zhangpeng station repeatedly appeared opposite to the underlying table, salinity vertical mixing is sufficient; the maximum distance of the constructed model can better simulate the saltwater intrusion, Humen waterway tide intrusion distance and strength are greater than the neap tide, salt wedge activities significantly affected by tidal current intensity.
【作者单位】：中山大学水资源与环境研究中心;华南地区水循环与水安全广东省普通高校重点实验室;
【基金】：国家自然科学基金项目(41301627)~~
【分类号】：P731.2
【正文快照】： 盐水入侵又称咸潮上溯,是河流入海口的一种自然现象,也是河口研究中的核心问题之一。随着社会经济的发展,河口地区的经济生活越来越繁荣,由于咸潮上溯造成的经济损失和社会影响也越来越严重。在珠江三角洲地区,由于河网纵横交错,地形地貌和水动力条件十分复杂,而且分布着较多

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