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采用不规则三角网格和有限体积方法,建立普兰店湾附近海域的潮流数值模型,在验证良好的潮流数学模型的基础上,以溶解态的保守物质作为示踪剂,对普兰店湾水交换状况进行了数值模拟,将普兰店湾划分成6个区域,针对各区域进行了水交换能力研究。结果表明:普兰店湾内不同区域的地形和地理位置变化较大,水体交换能力平面分布不均匀。在普兰店湾的6个子区域中与湾外的水交换速度最快的为A区(湾口处),连续潮作用10 d后,水体交换率达到45%。水交换速度最慢的为F区,100 d后水体交换速率为14%。普兰店湾内水交换控制机制的区域性差异使得湾内不同区域水交换率相差较大。
Using irregular triangular mesh and finite volume method, a numerical model of tidal current in the sea near Pulandian Bay was established. On the basis of verifying the good tidal current mathematical model and using dissolved substance as tracer, The situation was numerically simulated. The Pulandian Bay was divided into six regions, and the water exchange capacity of each region was studied. The results showed that the topography and geographical location of Pulandian Bay varied greatly in different regions and the water surface exchange ability was unevenly distributed. In the six sub-areas of Pulandian Bay, the water exchange rate with the outside of the bay was the fastest in Zone A (at the mouth of the bay), and after 10 days of continuous tidal flow, the water exchange rate reached 45%. The slowest water exchange rate was F zone, and the water exchange rate was 14% after 100 days. Regional differences in the Pulandian Bay water exchange control mechanism caused large differences in water exchange rates between different areas within the Bay.