天津港主航道连续观测点潮流和余流特征分析

张安民; 宁一伟; 王晨旭; 张豪; 刘荣霞; 孙朝辉

doi:10.3969/j.issn.1001-909X.2019.01.010

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海洋学研究 ›› 2019, Vol. 37 ›› Issue (1) : 75-82. DOI: 10.3969/j.issn.1001-909X.2019.01.010

研究论文

天津港主航道连续观测点潮流和余流特征分析

张安民^1,2, 宁一伟¹, 王晨旭¹, 张豪¹, 刘荣霞¹, 孙朝辉³

作者信息 +

Study on the characteristics of tidal and residual currents on continuous observation near the main channel of Tianjin Port

ZHANG An-min^1,2, NING Yi-wei¹, WANG Chen-xu¹, ZHANG Hao¹, LIU Rong-xia¹, SUN Chao-hui³

Author information +

文章历史 +

摘要

基于天津港主航道连续观测点31 d的实测海流资料,利用调和分析对主航道潮流和余流特征进行研究,同时结合同步风速资料研究风对表层余流的影响。结果表明:(1)航道附近属于弱流海区,表层平均流速为31.4 cm/s,流速总体上由表至底逐渐减小,流速方向大致集中在NW—SE向。(2)观测海域潮流以正规半日往复潮占主导,优势分潮为M₂,浅水分潮较为显著,涨潮流流速大于落潮流流速。(3)观测期间表层平均余流流速为2.8~13.8 cm/s,随着深度增加余流流速逐渐减小,方向大多为NW向。该站表层余流受风的影响显著,东南风将使余流方向偏向西北。

Abstract

The characteristics of the tidal and residual currents were investigated via the harmonic analysis based on the 31-day duration current observations at S station near the main channel of Tianjin Port. Effects of the local wind on the surface residual currents were explored in combination with the simultaneous wind velocities data. It is found that: (1)Tianjin Port belongs to the weak-current sea area, and the average velocity of the surface currents is about 31.4 cm/s. The current velocity generally decreases from the top to the bottom, and the main current direction is along the northwest-southeast. (2)The sea area is dominated by the regular semidiurnal tidal currents with a significant to-and-fro movement. The dominant tide component is M₂, and the shallow water tide is also remarkable over there. The flood currents velocities are larger than the ebb currents. (3)The average residual currents during the observation period are between 2.8 cm/s and 13.8 cm/s. The current velocity decreases as the depth increases, and the main current direction is along the northwest. The residual currents in the surface layer of the station are dramatically affected by the local wind, and the southeast wind shifts the residual currents to northwest.

导出引用

张安民, 宁一伟, 王晨旭, 张豪, 刘荣霞, 孙朝辉. 天津港主航道连续观测点潮流和余流特征分析[J]. 海洋学研究. 2019, 37(1): 75-82 https://doi.org/10.3969/j.issn.1001-909X.2019.01.010

ZHANG An-min, NING Yi-wei, WANG Chen-xu, ZHANG Hao, LIU Rong-xia, SUN Chao-hui. Study on the characteristics of tidal and residual currents on continuous observation near the main channel of Tianjin Port[J]. Journal of Marine Sciences. 2019, 37(1): 75-82 https://doi.org/10.3969/j.issn.1001-909X.2019.01.010

中图分类号： P731.21

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