通州沙西水道整治工程对通州沙河段潮流量影响研究

A Study on Impact on Discharge of Tongzhousha Reach Caused by the Regulation Project of West Tongzhousha Waterway

通州沙水道位于长江下游河口段,为增加沿岸深水岸线资源,拟对通州沙西水道进行整治。利用一、二维耦合潮流数学模型,对于通州沙西水道整治工程方案进行研究,重点分析整治工程对通州沙河段潮流量的影响。研究结果表明:通州沙西水道的边滩圈围和潜堤工程会减少涨落潮流量;而疏浚工程则会增强潮流量、局部抵消圈围及潜堤工程的不利影响。特别需要注意的是:当航道浚深至-8 m时,整治工程对工程河段分流比影响甚微,然而此时潮流量、流速的沿程变化不可忽视。

Tongzhou shoal waterway lies in the estuary of Lower Yangtze. To increase the waterfront resources, a regulation project of west Tongzhou shoal waterway was planned. Applying oneand twodimensional coupling model. Regulation project proposals of west Tongzhou shoal waterway is studie, and mainly analyzed the impact on discharge of Tongzhou shoal reach caused by the regulation project. The research shows ： pointbar reclamation and submerged dike of west Tongzhou shoal waterway could reduce flow discharge, while dredging could partially bal ance the negative impact of pointbar reclamation and submerged dike. It should be noted that, the least influence on diversion ratio takes place at the water depth of 8 m after dredging of the west branch, but at the same time, the change of the discharge and the velocity can not be ignored, may influence channel stability.