水流蜿蜒弯曲起弯点变化规律研究

Study on the Change Law of the Starting Point of Meandering Flow

蜿蜒弯曲型河流起弯点的确定,对于河流从山区河流转变为平原河流时如何发生弯曲,随后如何形成稳定的合理河道型态,从而据此对河流进行科学治理,实现河流的长治久安有着极为重要的意义。本文在一定流量与坡度变化范围内展开定性研究,探讨水流出流流量、坡度、流速、水流宽度等诸因素对单一水流的水流弯曲起弯点影响变化规律。研究表明,水流弯曲起弯点与水流宽度之间不存在密切的相关关系,水流弯曲起弯点与流量、坡度、流速等因素之间虽然没有直接相关关系,但变换后的水流弯曲起弯点与相关因素的比值,与流量、坡度、流速等各因素呈负向相关关系。

The determination of the starting point of meandering curved rivers is of great significance for how the river bends when it changes from a mountainous river to a plain river,and then how to form a stable and reasonable river pattern,so as to scientifically manage the river and realize the long-term stability of the river.In this paper,the qualitative research is carried out in a certain range of flow and slope,and the influence of flow discharge,slope,flow velocity,flow width and other factors on the flow bending inflection point of single flow is discussed.Studies have shown that there is no close correlation between the water flow moment and the flow width.Although there is no direct correlation between the flow bending moment and the flow rate,slope,flow velocity and other factors,the ratio of the transformed flow bending moment to the relevant factors is negatively correlated with the flow rate,slope,flow velocity and other factors.