潮汐和潮流影响下苏北辐射沙洲海域波浪模拟分析-海洋预报

潮汐和潮流影响下苏北辐射沙洲海域波浪模拟分析

单位：1. 河海大学海岸灾害及防护教育部重点实验室, 江苏南京210098;
2. 国家海洋局东海预报中心, 上海200081;
3. 河海大学企业管理学院, 江苏常州213022

分类号：P731.22

出版年·卷·期（页码）：2015·32·第二期（24-30）

摘要：

基于第三代海浪模型SWAN,采用自嵌套的方法提供谱边界条件,对影响苏北辐射沙洲海域的一次冷空气过程和一次台风过程作用下的波浪进行了模拟。考虑到沙洲海域强潮水动力环境,分析了潮位和潮流的变化对该海域波浪的影响。结果表明,沙洲处波高和波周期受潮位影响显著,受潮流影响弱,具有潮周期起伏的特点,而波向受潮位潮流影响不显著;考虑高潮位后,以弶港为界,南北辐射沙洲波高显著增加的区域与波浪传播方向有关:波浪由北向南传播,相差不大,波浪由东向西传播,北部明显大于南部。

Based on the third generation numerical wave model SWAN, using self-nested method to provide the spectral-type boundary, the process of wave caused by a cold air and typhoon in the radial sandbanks is simulated. Considering the strong hydrodynamic environment, the characteristics of wave influenced by changes of tide and current is analyzed in this area. The results show that, in the sandbanks, wave height and period are affected significantly by tide, and weakly by current, which have a tidal cycle. But wave direction is affected weakly both by tide and current. Considering the high tide level, demarcated by Jiang Port, the area of the south and north radial sandbanks, where wave height increases significantly, is related to wave direction. The difference of wave height is little when wave spreads from north to south. While wave spreads from east to west, the wave height in north area is significantly higher than that in south area.

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