| 摘要: |
| 基于采用不规则三角网格的海洋模型FVCOM(An Unstructured Grid, Finite Volume Coastal Ocean Model), 对獐子岛附近海域的潮汐、潮流进行了精细化数值模拟研究, 模拟的潮汐、潮流与实测值符合良好, 表明建立的该海域精细化潮汐潮流数值模型合理可靠。依据计算结果绘制了M2、S2、K1和O1分潮的同潮图和潮流椭圆图, 并对该海域潮汐潮流特征进行了系统分析。结果表明, 獐子岛附近海域的潮汐主要以规则半日潮为主, 水平潮流多为旋转流, 旋转方向大部分为逆时针; 近岸海区和水道之间多为往复流, 在大鹿岛以南海域也存在一往复流的区域。在123.75°E以东存在一顺时针旋转的区域。由潮余流场的特点可看出, 獐子岛等各岛屿周围均形成气旋式的绕岛流, 流速一般位于8—12cm/s之间, 离岸线较远的外海区域余流较小, 只有1—2cm/s。本文所得结论, 有助于增加对整个獐子岛海域潮汐潮流特性的全面认识。 |
| 关键词: 獐子岛 数值模拟 潮汐 潮流 余流 |
| DOI：10.11693/hyhz201306009 |
| 分类号: |
| 基金项目:中国科学院创新项目(KZCX2-YW-BR-215-3), 中国科学院创新项目群(KZCX2-YW-Q07-01), 国家908补充调查项目(908- 01-BC12)资助。 |
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| 3-D NUMERICAL SIMULATION OF TIDAL FIELD NEAR ZHANGZI ISLAND, NE CHINA |
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QI Ji-Feng1, CAO Sheng-Shan1, GUO Ke-Cai2, YANG De-Zhou3,4, XU Zhen-Hua3,4, YIN Bao-Shu3,4
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1.Mathematics Academy of Sciences, Ocean University of China;2.North China Sea Marine Forecasting Center of State Ocean Administration;3.Institute of Oceanology, Chinese Academy of Sciences;4.Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences
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| Abstract: |
| We numerically simulated the tide and tidal currents near Zhangzi Island (an important aquaculture field) in Liaoning, NE China using an unstructured triangle grid in finite-volume coastal ocean model (FVCOM). Results agree well with the in-situ observations. The co-tidal charts and the tidal current ellipses of M2, S2, K1,and O1are drawn and discussed using calculated results. It is shown that the tidal field is characterized by regular semidiurnal tide. Horizontal flow rotates anticlockwise in the most parts of the study area, while it is clockwise east of 123.75°E. Rectilinear flow exists in nearshore and river channels. In the south of Daludao Island, horizontal tidal flow reciprocates obviously in south-north direction. In addition, some cyclonic currents are formed around Zhangzi Island and other islands nearby. Residual current velocity averages between 8 and 12 cm/s, and reduces to 1-2 cm/s in farshore area. These results present a good description for the tidal field near Zhangzi Island. |
| Key words: FVCOM sea area of Zhangzidao island tide tidal current residual current |
