汕尾品清湖水体交换数值模拟研究  

Numerical Simulation of Water Exchange Changes in Pinqing Lake

作　　者：吴志辉 叶智豪 宋学龄 陈起程 WU Zhihui;YE Zhihao;SONG Xueling;CHEN Qicheng(Guangzhou Lanche Marine Technology Co.,Ltd.,Guangzhou 510725,China)

机构地区：[1]广州蓝澈海洋技术有限公司,广东广州510725

出　　处：《海洋技术学报》2025年第1期43-50,共8页Journal of Ocean Technology

摘　　要：品清湖所面临的生态环境问题日益加剧,为探究品清湖的现状,本文基于非结构化数值模型研究品清湖的水动力特征,通过耦合输移扩散模型研究分析了品清湖水体交换能力。模拟得到:品清湖内涨落潮流基本呈往复流,口门区域流速较大,品清湖内部潮流较弱。整个品清湖平均的水体半交换时间为26.7 d;从口门至湖顶的水体半交换时间逐渐增大,口门附近半交换时间较短,水体交换能力较强,位于口门附近的A区和B区平均水体半交换时间分别为0.4 d和3.4 d;而远离口门和水深较浅区域,水动力条件减弱,水体半交换时间加长,水体交换能力较差,品清湖中部区域E区、避风塘C区和D区平均水体半交换时间分别为13.0 d、18.7 d和19.7 d,湖顶附近水体半交换时间最长超过75 d。研究成果可为品清湖生态环境治理提供理论指导。The ecological and environmental problems facing Pinqing Lake are becoming increasingly serious.In order to explore the current situation of Pinqing Lake,this paper studies the hydrodynamic characteristics of Pinqing Lake based on an unstructured numerical model,and analyzes the water exchange capacity of Pinqing Lake through a coupled transport and diffusion model.The results show:the tidal current in Pinqing Lake basically presents reciprocating flow,and the velocity at the mouth is larger,while the tidal current in Pinqing Lake is weaker.The average water exchange half-time in the whole Pinqing Lake is 26.7 days.The water exchange half-time from the mouth gate to the lake top gradually increases,and the water exchange half-time near the mouth gate is relatively short,which indicates strong water exchange capacity.The average water exchange half-time in Zone A and Zone B near the mouth gate is 0.4 d and 3.4 d,respectively.In the area far away from the mouth and shallow water depth,the hydrodynamic conditions become weaker and the water exchange half-time is longer,which shows poor water exchange capacity.The average water exchange half-time of water in the central area E,typhoon shelter C and D of Pinqing Lake is 13.0 d,18.7 d and 19.7 d,respectively,and the maximum water exchange half-time of water near the lake top is more than 75 d.The results of this study can provide theoretical guidance for the ecological environment management of Pinqing Lake.

关 键 词：品清湖 水体交换 数值模拟 

分 类 号：P731.2[天文地球—海洋科学]