横向环流

模型考虑了横向环流的影响，并求解了水深平均的时均动量方程及连续方程。

The model applies depth-averaged momentum eguations and continuity equation to curved channel flow .

弯道水流的动力特性主要集中在水面横比降、横向环流、流速重分布等方面。

Bend flow momentum characteristics is mainly concentrated in the surface sloop , cross circulation and the velocity re-distribution .

西风急流出口区的横向环流对暴雨的加强有间接贡献。

The lateral circulation at the exit of the westerly jet contributed indirectly to the enhancement of the rainfall .

凹岸部位主流线的顶冲和弯曲河道横向环流的侧蚀，是决口的外部因素；

The external cause is the mother current scouring the concave bank and the lateral circulation scouring the curved river channel .

天然的河流河道基本都是蜿蜒曲折的，由于弯道形态的影响，弯道中存在横向环流，这就使得弯道中水流的输移有着截然不同与顺直河道的特性。

The natural channel is always curved . So it exist the second circulation . Which made the water and sediment delivery different from straight channel .

表层流有偏北的分量，底层流有向南分量，表明有横向环流存在。

There is a northward component of current at upper layer and a southward component of current at lower layer , this indicates that there exists transverse circulation .

本文着重对弯道水流水面横比降、横向环流、纵向垂线平均流速分布规律及弯道输沙特性研究进展进行了阐述分析，以便为生产科研方面服务。

This paper discusses the research development of such laws as the lateral slope of the water surface , secondary circulation flow , average velocity along vertical line , distribution of the main streamline and sediment transport characteristics in the river bend .