东辽河南崴子灌区渠首闸门流量系数的率定

Determination of flow coefficient at canal head gate in Nanweizi Irrigation District of Dongliao River

闸门流量系数的准确率定是灌区引水流量计算及水资源配置的重要依据。通过对吉林省公主岭市南崴子灌区渠首段进行水文测验,获得水位、流量等数据;再通过统计计算,分析了流量系数与闸门上下游水位差、流量系数与闸门相对开度以及流量系数与下游流量之间的关系。结果表明,流量系数与闸门上下游水位差呈负相关关系,而流量系数与闸门相对开度、流量系数与下游流量呈正相关关系,而且相关系数均在0.8以上。

Accurate determination of gate flow coefficient is very important for the water resources allocation and calculation of the discharge into the irrigation district. Based on the hydrological tests of the canal head in Nanweizi Irrigation District of Gongzhuling City in Jilin Province, we obtained water level and flow data. The relationships between the flow coefficient and water level difference of gate upstream and downstream, flow coefficient and relative opening degree of the gate, and flow coefficient and downstream flow were obtained using the statistical calculations. The results showed that flow coefficient is negatively correlated to the water level difference between gate upstream and downstream, whereas flow coefficient is positively correlated to the relative opening degree of the gate and the downstream flow, and all correlation coefficients are above 0. 8.