| 杨青莹 杨万康 潘冲 宋泽坤 叶钦 |
| Study on characteristics of water exchange in the Huachang Bay |
| 投稿时间：2018-08-28 修订日期：2018-11-28 |
| DOI： |
| 中文关键词: 花场湾 MIKE21 纳潮量 保守物质 半交换周期 |
| 英文关键词:Huachang Bay MIKE21 tidal prism conservative material half-exchange period |
| 基金项目:浙江省自然科学基金青年资助(LQ16D060007) |
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| 中文摘要: |
| 花场湾为海南岛北部的一个半封闭海湾，随着周边工程的建设，湾内水质有所恶化。基于MIKE21软件建立了花场湾海域的二维水动力数值模型，模型结果与实测数据吻合较好，对花场湾的纳潮量及水交换特征进行了研究。结果表明：纳潮量占花场湾固有水容量的比例较大，说明花场湾受湾外水动力影响较为显著，具有良好的水交换特性，利于污染物的扩散。然后采用保守物质扩散方法来定量分析花场湾的水交换周期，得到花场湾的半交换周期大约为 3 d，15 d后基本完成了全部水交换，保守物质浓度随涨落潮过程呈现波动变化。 |
| 英文摘要: |
| Huachang Bay is a semi-closed bay in the northern part of Hainan Island. With the construction of engineer projects, the water quality in the bay has deteriorated severely. A two-dimensional hydrodynamic mathematical model for Huachang Bay was established based on MIKE21 software and the model simulation results were in good agreement with the measured data. Tidal prism and water exchange characteristics of Huachang Bay were studied. The result shows that the ratio of tidal prism to the natural water capacity of Huachang Bay is large, indicating that Huachang Bay is significantly affected by hydrodynamic force outside the bay. The water exchange characteristics of Huachang Bay facilitate the diffusion of pollutants. Then conservative material diffusion method was used to quantitatively analyze the water exchange period of Huachang Bay. The half-exchange period of Huachang Bay is about 3 days and the process of water exchange is completed after 15 days. The concentration of conservative material fluctuates with the rising and falling tides. |
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