大铲湾突堤开槽的水环境响应  

Water environment response to slotting on jetty in Dachan Bay

作　　者：唐榆森 涂新军 王燕 梁巧茵 周文浩 赖荣标 TANG Yusen;TU Xinjun;WANG Yan;LIANG Qiaoyin;ZHOU Wenhao;LAI Rongbiao(School of Civil Engineering,Sun Yat-sen University,Guangzhou 510275,China;Center of Water Security Engineering and Technology in Southern China of Guangdong,Guangzhou 510275,China;Guangdong Laboratory of Southern Ocean Science and Engineering,Zhuhai 519000,China;Shenzhen Water Planning and Design Institute Limited Company,Shenzhen 518036,China;Three Gorges Hydrology and Water Resources Survey Bureau,Hydrology Bureau of Changjiang Water Resources Commission,Yichang 443000,China)

机构地区：[1]中山大学土木工程学院,广东广州510275 [2]广东省华南地区水安全调控工程技术研究中心,广东广州510275 [3]南方海洋科学与工程广东省实验室,广东珠海519000 [4]深圳市水务规划设计院股份有限公司,广东深圳518036 [5]长江水利委员会水文局长江三峡水文水资源勘测局,湖北宜昌443000

出　　处：《水资源保护》2022年第6期146-153,共8页Water Resources Protection

基　　金：国家自然科学基金(51879288);广东省水利科技创新项目(2020-27)。

摘　　要：基于构建的中国南部伶仃洋二维水动力及水质模型,从潮流场、换水周期和污染带变化分析了粤港澳大湾区东部典型研究区大铲湾在突堤码头根部开槽的水环境响应。结果表明:大铲湾湾尖区域相对封闭,水流运动缓慢,受入湾河流陆源排污影响,水污染问题较为突出;开槽后,由于增加了新的潮汐通道,湾尖区域的涨落潮动力提高,换水周期明显缩短,污染带范围显著缩小,湾尖污染带面积占比随着开槽宽度的增加表现为先快速下降、后趋近平缓的特点;综合考虑海湾水环境改善效果和工程经济性,认为合理的开槽宽度为60~100 m。With the two-dimensional hydrodynamic and water quality models of Lingdingyang estuary in South China,the marine water environment response to slotting at the root of the jetty in Dachan Bay,a typical study area in the eastern Guangdong-Hong Kong-Macao Greater Bay Area,was analyzed based on the changes of tidal current field,water e-folding time,and pollution zone.Results showed that the tip area of Dachan Bay was relatively closed with slow current,where water pollution was serious under the impact of land sewage discharge.After slotting,the fluctuation tidal power in the tip area of the bay was increased,the water e-folding time was obviously shortened,and the ranges of the pollution zone were significantly decreased due to the occurrence of the new tidal channel.With the increase of the slotting width,the proportion of the pollution zone in the tip area of the bay sharply decreased at first and then changed slightly.To improve the water environment and economic effectiveness of the project,it is considered that the reasonable slotting width should be 60~100 m.

关 键 词：突堤开槽 水环境响应 污染带 大铲湾 粤港澳大湾区 

分 类 号：TV92[水利工程—水利水电工程]