砂坝潟湖海湾水交换能力的数值模拟研究——以茂名博贺湾为例  

Numerical study on water exchange ability of sand dam lagoon bay: taking Maoming Bohe bay as an example

作　　者：陈宏洺 张淑华[1] 何杰[3] CHEN Hong-ming;ZHANG Shu-hua;HE Jie(Key Laboratory of Coastal Disaster and Defence,Ministry of Education,Hohai University,Nanjing 210098,China;College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]河海大学海岸灾害及防护教育部重点实验室,南京210098 [2]河海大学港口海岸与近海工程学院,南京210098 [3]南京水利科学研究院,南京210029

出　　处：《水道港口》2019年第5期532-540,共9页Journal of Waterway and Harbor

基　　金：国家重点研发计划(2017YFC0405900)

摘　　要：茂名博贺湾为典型砂坝潟湖海湾,除湾口深槽外湾内水深普遍较小,海湾水交换条件良好。文章建立了覆盖博贺湾及其附近水域的平面二维潮流数学模型,在对近期实测水文资料验证的基础上,模拟了博贺湾水交换过程及其动力机制,分析了海湾的潮流、纳潮量和水交换特征。模拟结果表明:落潮期间湾内大片浅滩露出水面,在大潮水情下一个全日潮过程中的交换率达到69%,海湾水交换能力较强;博贺港规划实施后,湾内纳潮量减小16.4%,水交换速率在示踪剂投放初期会比现状条件弱一些,但后期水交换情况基本与现状一致。博贺港规划建设对博贺湾水交换能力影响总体较小。Maoming Bohe bay is a typical sand dam lagoon bay.The condition of the water exchange in a good situation except to the deep groove at the mouth of the bay due to the small water depth.The two-dimensional tidal current mathematical model covering Bohe bay and adjacent waters was established in this paper.Based on the verification of recent hydrological data,the process of the water exchange and its dynamic mechanism of Bohe bay were simulated,the tidal current,tidal prism and water exchange characteristics of the bay were analyzed.The result of simulation showed that a large number of shallows in the bay were exposed to the water surface,the exchange rate of the bay water body in a full-day tide reaches to 69% during the ebb tide period.The ability of the water exchange in the bay is strong,the tidal volume in the bay is reduced by 16.4% after the implementation of the Bohe Port.The rate of water exchange becomes weaker than the current conditions in the initial stage of the tracer delivery,however,the situation of water exchange in the later stage is basically consistent with the current situation.The influence of the plan and construction of Bohe Port on the water exchange capacity of Bohe bay is generally small.

关 键 词：博贺湾 水交换 潮流 数值模拟 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV143[交通运输工程—船舶与海洋工程]