摘要
为了研究新型河海快通闸作为金汇港航道出海通航建筑物时的海水入侵影响,基于盐水对流扩散理论建立三维数值模型,采用验证后的模型模拟海水以异重流形式通过新型河海快通闸入侵内河的过程,基于平均盐度、盐水入侵距离、盐水交换率等参数对新型河海快通闸进行防咸效果分析。模拟与分析结果表明,海水在与淡水掺混、被淡水稀释的过程中逐渐向闸室和内河入侵,海水平均盐度随着入侵距离的增加而逐渐降低;随着盐量在集咸区的沉积,海水的上溯速度逐渐降低;在设施运行一段时间后海水入侵距离基本稳定不变,盐水交换律也逐渐趋于动态平衡。新型河海快通闸采用集咸区和径流冲泄的双重防咸措施,可进一步增强新型河海快通闸的防咸效果。研究结论可为新型河海快通闸在河海直达航道中的设计和应用提供科学依据。
To research the influence of seawater intrusion when the new navigable lock is used in Jinhuigang waterway,a three-dimensional numerical model is established based on the saltwater convective diffusion theory,and the verified model is used to simulate the process of seawater intrusion into the inland river in the form of heavy flow through the new navigable lock.Based on the average salinity,salt water intrusion distance,salt water exchange rate,the anti-salt effect of the new navigable lock is analyzed.The results of simulation and analysis show that seawater intrusion gradually invades the lock chamber and inland river during the process of dilution and mixing with freshwater,and the average salinity of seawater decreases with the increase of intrusion distance.With the salt deposition in the salt-collecting area,the seawater upstream velocity gradually decreases.The seawater intrusion distance is basically stable after a period of operation of the facility,and the salt exchange rate gradually tends to be dynamic equilibrium.The new navigable lock adopts the anti-salinity measures of salt collecting area and runoff flushing,which can further enhance the anti-salinity effect of the new navigable lock.The research results can provide scientific basis for the design and application of the new navigable lock in the direct waterway of river and sea.
作者
周树高
陈潇逸
杨行
ZHOU Shugao;CHEN Xiaoyi;YANG Hang(Shanghai Communications Water Transportation Design and Research Co.,Ltd.,Shanghai 200092,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《水运工程》
2024年第12期124-131,共8页
Port & Waterway Engineering
关键词
通航建筑物
数值模拟
海水入侵
防咸措施
河海直达
navigation structure
numerical simulation
seawater intrusion
anti-salinity measure
direct transport between river and sea
