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湾口建闸海湾水体交换及景观水位数值模拟
佘小建,崔峥
0
(南京水利科学研究院,江苏 南京 210024)
摘要:
大幅度的潮位变动对近岸景观和亲水性有较大影响,为此往往在湾口建闸控制湾内潮位变动,通过设置景观水位改善以上问题,但这将带来湾内的水动力及水体交换条件下降。本研究以马銮湾为例通过潮流数学模型模拟,研究湾口开闸孔数、开闸位置及不同景观水位与湾内水动力和水体交换的关系。利用湾口闸门调度,在湾内形成大尺度环流提高水体交换效率,对马銮湾景观水位和闸门调度方式提出了建议,有效地解决了湾内潮差减小引起水体交换效率减低的问题。
关键词:  物理海洋学  景观水位  潮流数学模型  水体交换  建闸海湾
DOI:10.3969/J.ISSN.2095-4972.2020.02.010
基金项目:国家重点研发计划资助项目 ( 2018YFC0407505)
Numerical simulations of seawater exchanges and landscape water levels on gate construction at the bay mouth
SHE Xiao-jian,CUI Zheng
(Nanjing Hydraulic Research Institute, Nanjing 210024, China)
Abstract:
The big changes in tidal level have a great impact on nearshore landscape and hydrophilicity. For this reason, we often construct gates at the bay mouth to control the tidal level changes of the bay. As results, the hydrodynamic and water exchange capability in the bay can be affected. The problems can be improved by setting the landscape water level. However, this will decrease the hydrodynamic and water exchange conditions in the bay. Taken Maluan Bay as an example, the tidal current mathematical model is used to simulate and study the relationship of numbers of gate openings, opening positions, different landscape water levels at the bay mouth and the hydrodynamic and water exchange in the bay. It shows that largescale circulation is formed in the bay by regulating the gate operation at the bay mouth to enhance the water exchange efficiency. Here, suggestions are made on the control of landscape water level and on the gate operation mode of Maluan Bay. Hence it may effectively solve the problem of low water exchange efficiency caused by tidal range decrease in the bay.
Key words:  physical oceanography  landscape water level  tidal current mathematical model  water exchange  gate construction

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