苏北浅滩浅水分潮特征研究

发布时间：2018-01-27 15:56

本文关键词： 苏北浅滩浅水分潮 FVCOM　出处：《海洋湖沼通报》2017年02期 　论文类型：期刊论文

【摘要】：应用高分辨率网格和高精度的苏北浅滩地形数据,利用非结构有限体积模型FVCOM,精细化地模拟了苏北浅滩潮汐主要特征,研究了浅水分潮M4、MS4和M6的主要特征,并与前人的研究成果做了比较。本文结果显示M4和MS4分潮潮波传播特征类似,浅滩内存在3个旋转潮波系统,南侧小庙洪水道处为逆时针旋转,浅滩北侧为顺时针和逆时针旋转系统各1个。对于M6分潮,本文的结果显示存在3个无潮点,2个为逆时针,1个为顺时针。M4分潮振幅在近岸处最大能达到14cm以上,MS4分潮振幅比M4略小,M6振幅最小,仅能达到M4分潮振幅的20%左右。为了验证浅滩沙脊地貌对当地浅水分潮的影响,本文进一步在平滑地形的基础上重新模拟主要浅水分潮M4,结果表明水道和沙脊地貌参与了当地浅水分潮无潮点的形成,并且浅滩的坡度是影响振幅大小的重要因素。
[Abstract]:Using high-resolution grid and high-precision topographic data of shoal in northern Jiangsu, the main characteristics of tide in shoal of northern Jiangsu are simulated finely by using unstructured finite volume model FVCOM.The shallow water tidal component M4 is studied. The main characteristics of MS4 and M6 are compared with the previous research results. The results show that the propagation characteristics of M4 and MS4 tidal wave are similar, and there are three rotational tidal wave systems in the shoal. The south side of Xiaomiao Flood Road rotates counterclockwise, the north side of the shoal is clockwise and counterclockwise rotation system. For M6 tide, the results of this paper show that there are 3 non-tide points and 2 counterclockwise. One is clockwise .M4 tidal component amplitude in the coastal area the maximum can reach more than 14 cm of MS4 tidal component amplitude than M4 slightly smaller than M4 M6 amplitude is the smallest. In order to verify the influence of shoal ridge geomorphology on the local shallow water tidal component, this paper further simulates the main shallow water tidal component M4 on the basis of smooth topography. The results show that the geomorphology of watercourses and sand ridges is involved in the formation of non-tidal points in shallow water, and the slope of shoals is an important factor affecting amplitude.
【作者单位】：上海海洋大学海洋科学学院海洋生态系统与环境实验室;国家渔业工程技术研究中心;
【基金】：上海市科委重点支撑项目(13230502000)资助
【分类号】：P731.23
【正文快照】： 引言苏北浅滩特殊的辐射沙洲地形和及其复杂的水动力系统使得国内外学者越来越关注这片海域。近年来大量的观测工作在这里展开,但是碍于条件的恶劣和观测手段的限制,研究工作局限在有限的个别站点上[1],对于当地怪潮的作用机理和沙脊群的成因机制尚有争议,众说纷纭[2],这都有

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