岳城水库入库径流与观台站实测径流对比分析

Comparative analysis of Yuecheng Reservoir runoff and measured runoff from Guantai Station

2021年漳河流域降水偏多,引发暴雨洪水,岳城水库对观台站形成蓄水顶托影响。选取2021年3场暴雨洪水,分别进行暴雨及岳城水库-观台站区间降水径流计算分析,并在排除区间产汇流、水库水面降水等因素影响外,从月年径流及次洪径流两方面对岳城水库反推入库径流与观台站实测径流差值进行分析。岳城水库反推入库年径流与观台站实测年径流存在一定差值,但符合规范要求,次洪径流受水库闸门启闭影响,差值较大,建议复核泄洪曲线。

In 2021,there would be too much precipitation in the Zhanghe River Basin,which would cause rainstorm flood,and Yuecheng Reservoir had an jacking influence to the Guantai Section.In this paper,three heavy rain floods in 2021 were selected to calculate and analyze the precipitation and rainfall runoff between Yuecheng Reservoir and Guantai Station respectively.In this paper,after deducting the influence factors such as local inflow and reservoir water surface precipitation,the difference between the runoff of Yuecheng Reservoir and the measured runoff of Guantai station is calculated from two aspects of monthly annual runoff and stage runoff,and the reasons are analyzed.The difference between the annual runoff of Yuecheng Reservoir and the annual runoff measured at Guantai Station meets the standard requirements,but the secondary flood runoff is affected by the opening and closing of the reservoir gate,and the difference is large.It is suggested to modify the spillway curve.