| 基于走航ADCP资料的厦门内湾东西口门海域潮流与潮致余流特征分析 |
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| 引用本文： | 沈俊强,;潘伟然,;张国荣,;骆智斌,;林毅辉.基于走航ADCP资料的厦门内湾东西口门海域潮流与潮致余流特征分析[J].台湾海峡,2014(3):395-403. |
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| 作者姓名： | 沈俊强 ;潘伟然 ;张国荣 ;骆智斌 ;林毅辉 |
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| 作者单位： | [1]国家海洋局第三海洋研究所,福建厦门361005; [2]厦门大学海洋与地球学院,福建厦门361005 |
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| 基金项目： | 国家海洋局第三海洋研究所基本科研专项经费资金资助项目（海三科2013008） |
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| 摘 要： | 应用厦门内湾东西3个口门断面（五通—下店、嵩屿—鼓浪屿、鼓浪屿—轮渡）一个潮周日走航ADCP资料的空间插值潮、流调和分离结果,分析占主导的M2分潮流与余流沿断面的空间分布特征.分析结果表明受地形约束的3个断面M2分潮流均以往复流为主,断面深槽为主流通道,M2分潮最大可能流速均沿主流深槽向左右岸递减,三断面中以鼓浪屿—轮渡断面最为强劲,平均值为46 cm/s,五通—下店断面次之为43 cm/s,嵩屿—鼓浪屿断面最弱,仅为33 cm/s.该半日潮波进入厦门内湾首先在鼓浪屿—轮渡断面达到最大值,出现时间在月中天后2.1 h,其次为五通—下店断面2.7 h,最后为嵩屿—鼓浪屿断面3.3 h.再者地形变化剧烈的嵩屿—鼓浪屿断面M2分潮非线性运动较强,浅水分潮的幅度增大.潮波的非线性效应又衍生了非周期性的潮致余流,该余流在厦门内湾东西口门有较为稳定的存在,且表现为近岸区流幅大,潮流通道内小,嵩屿—鼓浪屿与鼓浪屿—轮渡断面均值为9 cm/s,五通—下店断面均值为5 cm/s,同时各个断面余流均存在使内湾海水正常更替,沿断面法向一分为二,一进一出的态势.基于本次观测结果计算出一潮周日厦门内湾东西口门余流通量为76.156×10^6m3,净潮通量为69.591×10^6m3,相对偏差小于8.6%.
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| 关 键 词： | 物理海洋学 厦门内湾 走航ADCP 空间插值 潮流分离 余流 |
Analysis of tidal and tidal induced residual current characterisitics based on ship-mounted ADCP data in east and west mouth inside Xiamen Bay |
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| Institution: | SHEN Jun-qiang , PAN Wei-ran, ZHANG Guo-rong, LUO Zhi-bin, LIN Yi-hui (1. Third Institude of OceanogTaphy, SOA, Xiamen 361005, China; 2. College of Ocean and Earth Sciences,Xiamen University, Xiamen 361005,China) |
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| Abstract: | This study is the first application of spatial interpolation harmonic result for tidal and residual current of ship-mounted ADCP data in tidal cycles on 3 sections of Songyu-Gulangyu, Gulangyu-Lundu and Wutong-Xiadian in the east and west inside Xiamen Bay, where the characteristics of dominant M2 tidal and residual current is analyzed along the cross-section. The results showed that in 3 sub-sections M2 is constrained by topography with rectilinear. The mainstream lies on the deep grooves of channel. M2 maximum possible velocity are descending to the left and right banks of mainstream deep grooves. Among 3 sections the section of Gulangyu-Lundu show the most powerful, with an average of 46cm/s followed by the section of Wutong-Xiadian, 43cm/s and the section of Songyu-Gulangyu, the weakest of only 33cm/s. The semidiurnal tidal wave enters into inner Bay of Xiamen first reaching maximum in Gulangyu-Lundu section, appeared 2. 1 hours after moon eulminion, Wutong-Xiadian, 2.7hours and Songyu-Gulangyu, 3.3hours. Furthermore dramic topography of Songyu-Gulangyu section M2 nonlinear tidal movement is stronger accompanied an increasing shallow wer tidal amplitude. The nonlinear effects of tidal waves derived from the non-periodic tide-induced residual current, which has a stable form over inside Xiamen Bay, and becomes large coastal and small in the tidal channel. Current velocities on Songyu-Gulangyu and Gulangyu-Lundu sections has a mean of 9cm/s in contrast 5 cm/s on Wutong-Xiadian section. On each section residual current balances the inner bay wers exchange and it divides into two by carrying in and out in normal direction. Based on this observion tidal cycles of residual current flux from east and -west mouth inside Xiamen Bay is calculed as 76. 156 × 10^6m3 , retained tidal flux, 69. 591 × 10^6 m3 , and the magnitude of absolute error is less than 8.6%. |
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| Keywords: | physical oceanography inside Xiamen Bay ship-mounted ADCP spatial interpolion tidal current separion residual current |
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