钦州湾海域纳潮量和水交换能力的数值模拟研究  

Numerical study on the tidal prism and water exchange ability of Qinzhou Bay

作　　者：张坤[1] 娄安刚[1] 孟云[1] 孙岳[2] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]国家海洋局海洋咨询中心,北京100860

出　　处：《海洋环境科学》2014年第4期585-591,共7页Marine Environmental Science

摘　　要：利用MIKE21 FM建立了钦州湾海域二维潮流模型,通过验证,结果与实测资料吻合良好,在此模型基础上分别选取企沙镇-乌雷村连线和21.75°N作为钦州湾和茅尾海的湾口断面,计算了钦州湾和茅尾海的纳潮量;在潮流模型的基础上耦合保守物质的对流扩散模型,分别对有无径流条件下钦州湾和茅尾海的水交换能力进行数值模拟研究。结果表明:钦州湾纳潮量最大为17.1×108m3,最小为1.89×108m3,平均9.20×108m3;茅尾海纳潮量最大为5.5×108m3,最小为0.62×108m3,平均2.96×108m3;有径流时钦州湾水体半交换时间为17.5 d,茅尾海半交换时间为9.3 d;无径流时钦州湾水体半交换时间为60.8 d,茅尾海半交换时间为45.4 d。A two-dimensional tidal current model of Qinzhou Bay is established with MIKE 21 FM. It is verified that the results of simulation agree well with the field observed data. Based on the model, the tidal prism of Qinzhou bay and Maowei Sea, which are defined with mouth lines of 21.75°N and Qisha-Wulei, are calculated. After that, a conservative substance transport-diffusion model is coupled with the tidal model to simulate the water exchange of the two seas, with conditions of with and without river discharge. The results show that, for Qinzhou Bay, the maximum and minimum tidal prism are 17.1 x 10^8 m3and 1.89 x 10^8 m3 , with an average of 9.20 x 10^8 m3 ; while for Maowei Sea, the maximum and minimum tidal prism are 5.5 x 10^8m3and 0.62 x 10^8m3 , averages 2.96 x 10^8m3. With the condi- tion of river discharge, the half-life time of Qinzhou Bay and Maowei Sea are 17.5 days and 9.3 days; while without river discharge, the half-life time of Qinzhou Bay and Maowei Sea are 60.8 days and 45.4 days.

关 键 词：钦州湾 茅尾海 纳潮量 水交换 

分 类 号：X134[环境科学与工程—环境科学]