水电站建成后分流河段水位流量关系的变化

The Change of Water Level-Discharge Relationships on a Split Flow River Section After Construction Completed

在分流河段修建水电工程，因受工程建设的影响，其下游的水位流量关系曲线将不再是单一曲线，而是一束以全断面流量为参数的曲线组。这束曲线中的任一曲线应通过３个特征点。曲线起点、天然分流点、曲线终点，这３个点确定后，即可推求不同总流量情况下的水位流量关系曲线。

Because of the effect of construction, the water level-discharge curve on the downstream of a split flow river section will not be a single curve, but a group of curves based on whole cross-section discharge. Any of the curves shall pass three characterized points- the starting point of the curves, natural split flow point, and the terminal point of the curves; After the determination of these points, the water level-discharge curves with different total discharge can be derived.