Analysis of riverbed evolution is basic to research on the bridge location reach, the navigation obstruction analysis of the bridge location reach can be sections of the water level, velocity, rapids in the waterway and evolution law to proceed. There are many reasons may cause navigation obstruction of bridge location reach,can be mainly attributed to: the plan and design of the bridge; oblique flow, circulation and other factors affect the navigation, it is particularly evident at branching channel; the evolution of the river.
引起桥位河段碍航的原因是复杂的,可主要归结为:桥梁规划设计不当;斜流,环流等影响通航的水流因素,在分汊河段和弯曲河段其对通航的影响尤为明显;桥梁建设所在河段的发展演变。
参考来源 - 桥位河段河床演变与航道整治研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Employing the characteristic values of the oblique flows, the navigation flow condition and optimized improvement measures are analysed.
介绍了用斜流和斜流效应的特征量来分析口门区的通航水流条件及其优化改善措施。
Because of the oblique flow, the ships are distorted, intensively shaken and bumpily deviated, finally, will offset the navigation's channel.
由于“斜向流”的作用，将迫使进出船闸的船舶扭转和强烈震动颠簸漂移，偏离航迹线，对船只航行是不安全的。
The factors related to the oblique flow, such as pressure difference, pressure and velocity gradients and the parameter of Ogee surface are also analysed.
文章分析了与折冲流有关的因素，如压差、压力和流速梯度以及渥奇面参数，进而提出了修改方案，基本解决了该孔存在的折冲流问题。
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