摘要
为了解疏浚工程对附近海域水环境的影响,应用MIKE21软件,建立了湄洲湾港东吴港区工程附近海域的二维水动力和泥沙输运计算模型,在对潮流和悬浮沙计算结果验证可靠的基础上,分析工程对附近海域水环境的影响。结果表明,(1)疏浚工程对附近海域的潮流产生影响,流向更有利于靠离泊作业。(2)工程前后流速变小,码头栈桥区域周边流速最大可减小1.23 m/s,回旋水域流速最大可减小约0.59 m/s,东吴航道流速最大可减小约0.43 m/s;(3)悬浮沙浓度增量10 mg/L包络线的最远扩散距离为4.01 km,扩散面积为14.66 km^(2);施工结束后,悬浮泥沙恢复至一类水质的时长约3 h,恢复至本底值所需时长约16 h。
In order to understand the impact of dredging projects on the water environment of the nearby sea areas,a two-dimensional hydrodynamic and sediment transport calculation model for the sea areas near the Dongwu Port Area Project of Meizhou Bay Port was established using MIKE21 software.Based on the results of the calculation the tidal currents,tidal levels,and suspended sand were verified.The effects of the project on the water environment in the area were analyzed.The results show that:(a)The dredging project has an impact on the tide in the nearby sea area,which is conducive to the operation of mooring;(b)The flow rate before and after the project becomes smaller,the maximum flow rate around the dock trestle area can be reduced by 1.23 m/s,the flow rate of the roundabout water can be reduced by about 0.59 m/s,and the maximum length of the Dongwu waterway can be reduced by about 0.43 m/s;(c)The maximum diffusion distance of the suspended sand concentration increment of 10 mg/L envelope line is 4.01 km,and the diffusion area is 14.66 km^(2).After the completion of the construction,the time required for the suspension of sediment to return to Class I water quality is about 3 hours,and the time required to return to the bottom value is about 16 hours.
作者
王璐
熊乐航
郝彩莲
后希康
张凯
陈焰
贾蕊宁
夏瑞
杨中文
WANG Lu;XIONG Lehang;HAO Cailian;HOU Xikang;ZHANG Kai;CHEN Yan;JIA Ruining;XIA Rui;YANG Zhongwen(Chinese Research Academy of Environmental Sciences,Beijing 100012;Beijing Normal University,Beijing 100012;China offshore environmental service Ltd,Tianjin,300450)
出处
《海洋湖沼通报》
CSCD
北大核心
2021年第3期17-24,共8页
Transactions of Oceanology and Limnology
基金
国家水污染治理与控制重大专项(2017ZX07301-001-01)
中国科学院战略性先导科技专项(A类)(XDA23040500)
国家自然科学基金项目(51879252)资助。
关键词
疏浚
MIKE
21
潮流
悬浮沙
Dredging
MIKE 21
Tide trends
Suspended sand