| 摘要: |
| 文中根据潮流场永久预报方法所提供的渤海、北黄海的Ⅰ型和Ⅱ型潮流场永久预报图,分析讨论了本海区潮流场的基本特征。文中对本海区半日潮、全日潮同时存在时的混合流场的基本特征进行了较详细的分析讨论。观测资料业已表明,在本海区的强流区中,易发生流速高达5kn以上、持续时间仅为几分钟或十几分钟这样短暂的潮急流。 |
| 关键词: Ⅰ型流场 Ⅱ型流场 潮急流 引潮天体 |
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| THE BASIC CHARACTERISTIC OF TIDAL FLOW FIELD IN BOHAI SEAAND NORTH HUANGHAI SEA |
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| Abstract: |
| The basic characteristic of the two kinds of typical flow fields, type Ⅰ and type Ⅱ, in Bohai Sea and North Huanghai Sea is discussed in this article. Under the astronomical conditions of the current field type I, the diurnal inequality of tide generating force field is very weak, so the diurnal inequality of the tidal flow field is also very weak, and the tide in every tidal harbours including Qinhuangdao which is known as the diurnal tidal harbour is presented with a standard semidiurnal tide. Under the astronomical conditions of the current field type Ⅱ, the diurnal inequality of tide generating force field is very strong, so the diurnal inequality of the tidal flow field and that of tidal amplitude are also very strong, and the tide in the Qinhuangdao is presented with a standard diurnal tide but the behavior of the diurnal inequality in the other harbours differs from each other. For example, the diurnal inequality is presented as a higher high water, in Huludao, Yingkou, Longkou, Miaogou, Xiaochangshan and Nanpu, and a lower low water in Tianjin, Yantai and Weihai. It is evident that the basic characteristic of the tidal flow field and the tidal level field is as a result of topographic feature, not that of the effect of Coriolis force. The tidal race with a speed of over 5 knots in a few minutes always occurs in these regions where tidal energy is rapidly concentrated. |
| Key words: Current field type Ⅰ Current field type Ⅱ Tidal race gravitational heavenly bodies |
