Three-dimensional tide and tidal current numerical simulation based on FVCOM in Quanzhou Bay
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摘要: 基于FVCOM海洋数值模式,采用非结构的三角形网格和有限体积法,建立了泉州湾海域高分辨率(26 m)的三维潮汐、潮流数值模型。模拟结果同2个验潮站和3个连续测流站的观测资料符合良好,较好地反映了泉州湾内潮汐、潮流运动的变化状况和分布特征,给出了M2、S2、K1、O1 4个主要分潮的同潮图、表层潮流椭圆分布,以及模拟区域内最大可能潮差、表层最大可能潮流流速和潮余流分布。分析表明,4个分潮的最大潮汐振幅和迟角差分别为219 cm和19°,85 cm和25°,26 cm和12°,26 cm和9°;石湖港以东海域的潮波为逆时针旋转的驻波,以西海域为前进波;最大可能潮差由湾口的8.0m向湾内增加至8.8 m。湾内潮流类型为规则半日潮流,落潮最大流速大于涨潮最大流速,北乌礁水道为强流区,表层最大可能潮流流速为2.4 m/s;湾口潮流运动以逆时针方向的旋转流形式为主,湾内的潮流运动以往复流形式为主,长轴走向主要沿着水道方向,与等深线和海岸线平行;四个分潮流表层最大流速分别为1.4 m/s,0.58 m/s,0.12 m/s,0.10 m/s。余流流速大小与潮流强弱有密切的联系,表、中、底层最大余流流速分别为26 cm/s,20 cm/s,16 cm/s,三者在水平方向基本呈北进南出的分布形态。Abstract: Based on a finite-volume coastal ocean model (FVCOM), adopting an unstructured triangle grid, a three-dimensional tide and tidal current numerical modeling with high resolution (26 m) is applied to Quanzhou Bay. The simulated results agree well with the observed data from two tide-gauges and three continuing current stations, and reproduce the distribution features of the tide and tidal currents in the Quanzhou Bay famously. The distributions of co-tidal charts and tidal ellipses on the surface layer for four major constituents (M2,S2,K1,O1) are obtained. What's more, the distributions of the maximum probable tidal range and tidal currents velocity and tidal residual currents on the surface and bottom layers are obtained, too. By analyzing, the maximum tidal amplitude and phase-lag range for the four constituents are 219 cm and 19°,85 cm and 25°,26 cm and 12°,26 cm and 9°, respectively. The tidal wave is anti-clockwise standing wave in the east area of Shihu Port, but it is advancing wave in the west area of Shihu Port. The maximum probable tidal range increases from 8.0 m at the mouth of the bay to 8.8 m inside of the bay. The type of tidal currents is regular semi-diurnal currents inside of the bay, and the maximum velocity of ebbing is larger than flooding. The velocity in the channel of Beiwujiao is stronger than any other area, and the maximum probable tidal-current velocity is 2.4 m/s on the surface layer. The flow is rotating with anti-clockwise mainly at the mouth of the bay, while rectilinear flow is mainly inside of the bay, such as estuaries and channels. And the directions of major axes are along with channels direction mainly, or paralleling with isobaths and coastlines. The maximum tidal current velocities for the four major constituents are 1.4 m/s,0.58 m/s,0.12 m/s,0.10 m/s on the surface layer, respectively. Tidal residual currents velocity is closely related to tidal currents, the maximum velocities on the surface layer, the middle layer and the bottom layer are 26 cm/s, 20 cm/s, 16 cm/s, respectively. All of them are coming into the bay from north and going out of the bay from south.
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Key words:
- Quanzhou Bay /
- tide /
- tidal current /
- FVCOM /
- tidal residual current
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鲍献文,乔璐璐,于华明.福建省海湾围填海规划水动力影响评价[M].北京:科学出版社,2008:16. 刘浩,尹宝树.泉州湾潮汐、潮流及浅滩干湿变化的数值研究[J].水动力学研究与进展,2006,21(6):693-699. 赵今生,赵子丹,秦崇仁,等.海岸河口动力学[M].北京:海洋出版社,1993:504-507. Zheng L, Chen C, Liu H. A modeling study of the Satilla River Estuary, Georiga. Part Ⅰ: Flooding/drying process and water exchange over the salt marsh-estuary shelf complex[J]. Estuaries, 2003, 26(3):651-669. 李希彬. 东海大堤对湛江湾水动力环境影响的研究 [D]. 青岛:中国海洋大学,2008:53-54. 李真. 罗源湾围垦前后水动力环境的变化研究 [D]. 青岛:中国海洋大学,2009:68-69. Chen C, Beardsley R C, Cowles G. An Unstructured Grid, Finite-Volume Coastal Ocean Model: FVCOM User Manual(Second Edition). Tech. Rep. 06-0602, School for Mar. Sci. and Technol. (SMAST)/Univ. of Mass.-Dartmouth(UMASSD), New Bedford, Mass,2006:38-39. 中国人民解放军海军司令部航海保证部.大港及崇武港[M].天津:中国航海图书出版社,2005. 中国人民解放军海军司令部航海保证部.泉州港[M].天津:中国航海图书出版社,2007. 中国人民解放军海军司令部航海保证部.泉州湾附近[M].天津:中国航海图书出版社,2008. 朱学明,鲍献文,黄必桂,等. 西北太平洋的一种潮汐数值同化模型[J]. 海洋学报,2012,34(2):1-12. 李培良.渤黄东海潮波同化数值模拟和潮能耗散的研究.青岛:中国海洋大学,2002:79-80. 陈达熙.渤、黄、东海海洋图集——水文分册[M].北京:海洋出版社,1992. 侍茂崇. 物理海洋学[M]. 济南:山东教育出版社, 2004: 196. 宋德海,鲍献文,朱学明. 基于FVCOM 的钦州湾三维潮流数值模拟[J]. 热带海洋学报,2009,28(2):100-107.
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