二维水动力模型在姚江大厍船闸通航影响分析中的应用

Application of Two-dimensional Hydrodynamic Model in Navigation Influence Analysis of Dashe Lock in Yaojiang River

为分析引排水工程对船闸通航的影响,以大厍船闸为例,在"姚江西排"工程的背景下,利用MIKE 21软件构建了二维水动力模型,设计了11个引水工况和2个排水工况,计算了各工况下的水动力条件及河道冲淤情况。计算结果表明,各引水工况下,船闸引航道处水流纵向流速均在0.01~0.02m/s,横向流速均小于0.01m/s,且无冲淤发生;排水工况下,船闸引航道处水流纵向流速在0.12m/s以下,横向流速小于0.09m/s,在河道内有局部轻微冲淤;综合评价引排水工程对大厍船闸的通航无明显影响。研究成果可为类似船闸通航影响分析提供参考。

In order to analyze the influence of water transfer process on navigation lock,taking the Dashe lock as an example,a two-dimensional hydrodynamic model was built by using MIKE 21 under the background of " The West Water Transfer Project of Yaojiang River".The hydrodynamic parameters and sediment at the Dashe lock in 11 water diversion conditions and 2 drainage conditions were calculated by using the two-dimensional hydrodynamic model.The results show that under the various water diversion conditions,the longitudinal velocity is in the range of 0.01 m/s and 0.02 m/s,the lateral velocity is less than 0.01 m/s at the lock approach,and there is no scouring and siltation;Under the drainage conditions,the longitudinal velocity is less than 0.12 m/s,the lateral velocity is less than 0.09 m/s at the lock approach,and there is a little scouring and siltation in the river;However,the drainage project has no obvious impact on the navigation of the ship lock.The research results can be a reference to navigation influence analysis of other similar locks.