鉴江干流部分河段疏浚工程影响分析

Analysis of the Impact of Dredging Projects on Some Sections of the Main Stream of Jianjiang River

通过建立水文数学模型等手段,分析鉴江干流部分河段疏浚工程对河道水动力、水生态等方面的影响情况。研究结果表明:河道疏浚后河道平均高程及深泓高程均有所下降,河道水位降低,河道行洪能力提高;疏浚完成后河道流态整体变化不大,且随着河道行洪断面得到恢复,有利于保持河势的稳定;施工期间以及河道疏浚后,地形地貌发生一定改变,疏浚河床附近水流和河床底质发生变化,将会对河道水生态环境造成影响。

Through the establishment of hydrological mathematical models and other means,the impact of the dredging project on some sections of the main stream of the Jianjiang River on river hydrodynamics,water ecology and other aspects was analyzed.The research results show that after the dredging of the river,the average elevation and deep water elevation of the river have decreased,the water level of the river has decreased,and the flood carrying capacity of the river has improved.Afer the dredging is completed,the overall flow patterm of the river has not changed much,and as the flood carrying section of the river has been restored,It is conducive to maintaining the stability of the river;during the construction period and after the river is dredged,the topography will change to a certain extent,and the water flow and river bed substrate near the dredged river bed will change,which will have an impact on the river water ecological environment.