受水库回水及洪水影响的水位流量关系探讨

Discussion on water level-flow relationship influenced by reservoir backwater and flood

受水库回水及洪水涨落影响下的水位流量(Z~Q)关系是一种复杂的关系。本文以郁江支流沙坪河沙坪水文站测流成果为依托,通过虚拟水文监测点,测流时涨差、沙坪与虚拟水位差、沙坪站水位等多要素为参数构建沙坪站水位流量关系,并用于开展2023年洪水期、平陆运河建设期该河段的预警预报服务。此方法可为众多同时受水库回水顶托和洪水涨落影响的水文站构建水位流量关系提供方法参考和借鉴。

The water level-flow(Z~Q)relationship is complex under the influence of reservoir backwater and food rise or fall.Based on the flow measuring data of Shaping Hydrological Station located on Shaping River,a tributary of Yujiang River,by using virtual hydrological monitoring points,the water level-flow relationship at Shaping Hy⁃drological Station is established based on multiple factors such as the level rise difference during flow measurement,the difference between Shaping level and virtual water level,and the water level at Shaping Station etc.This rela⁃tionship was used to carry out warning and forecasting of this river section in the flood period of 2023 and during the construction period of Pinglu Canal.