基于洪水调度资料的水库闸门泄流曲线率定方法研究

Research on Calibration Method of Reservoir Gate Discharge Curve Based on Flood Dispatching Data

针对传统泄流曲线率定方法存在的流量系数难以测定、率定成本过高的问题,结合退水阶段入库流量过程线受闸门启闭影响发生突变的现象,根据历史洪水调度资料提取多种闸门泄流工况,并基于水量平衡方程,通过反推入库流量过程线的偏差来量化泄流曲线存在的偏差,进而对泄流曲线进行率定。以乌江流域大花水电站为例,根据2015~2020年洪水调度资料,利用该方法率定了右中孔泄流曲线,通过对比分析,率定结果较为准确,与实际相符。

In view of the difficulty of measuring the discharge coefficient and the high cost of the traditional discharge curve calibration method, this paper combines the phenomenon that the inflow flow process line of the reservoir is affected by the opening and closing of the gate during the receding stage. Based on the water balance equation, the deviation of the inflow flow process line was reversed to quantify the deviation of the discharge curve. And then the discharge curve was calibrated. Taking the Dahuashui Hydropower Station in the Wujiang River Basin as an example, based on the 2015-2020 flood dispatch data, the discharge curve of the right middle hole was calibrated. Through comparison and analysis, the calibration result was more accurate and consistent with the actual situation.