变动回水影响下的水位流量过程对应关系分析

Analysis of Relation between Water Level and Flow under the Influence of Fluctuating Backwater

闸坝变动回水影响的河道,其水位流量过程对应关系非常复杂,与来水量大小、闸门启闭、蓄泄量有关,因而存在着反峰、错峰、多峰对应等关系。以水量平衡原理为基础,分析推导了定量关系式,讨论了不同条件下的水位流量变化过程。结果表明,受闸坝变动回水影响的河段,不仅要增加测流次数,还要了解来水情况及闸门启闭条件。该分析结果可作为闸坝变动回水影响河段的流量测验、整编、分析及合理性检查等参考借鉴。

If a river is influenced by the dam fluctuating backwater,the relation between water level and flow will become very complex.That would be related to the quantity of the incoming water,lock gate opening or closing,and water of storage and drain,so there is relationship of anti-peak,peak shifting,multiple-peaks.Based on the principle of water balance,the quantitative relationship formula was analyzed and derived,the change process of the water level and discharge under different conditions was discussed.The results show that the river influenced by the dam fluctuating backwater not only need to increase the number of flow measurement,but also need to understand the water situation and the condition of the lock gate.