灌区分水闸门流量系数率定的试验研究

Experimental study on flow coefficient calibration of sluice gate in irrigation area

本文以黑龙江省绥化市庆安县和平灌区安邦河分水闸门流量系数为研究对象,通过试验研究确定安邦河分水闸门流量系数,为和平灌区安邦河分水闸引水量以及灌区水资源的优化配置奠定基础。在灌区水稻生长期至成熟期阶段,通过对庆安县和平灌区安邦河分水闸渠段进行水文监测,获得水闸上、下游水位和下游瞬时流量以及闸门开度等基础数据;在统计计算的基础上,分析了流量系数与闸门上下游水位差和闸门相对开度以及下游流量的相关关系。闸门流量系数与闸门启闭高度、闸门流量系数与下游流量大小均呈正线性相关;流量系数与上、下游水位差呈幂函数相关;而且相关系数均在0.80以上。通过试验率定安邦河进水闸门流量系数具有较高的准确性。为灌区渠道引水量的准确计算和渠道优化输配水提供了理论支撑,对下一步顺利开展和平灌区水资源优化配置具有十分重要的意义。

This paper takes the flow coefficient of Anbang River diversion gate in Heping Irrigation Area of Qingan county,Suihua City,Heilongjiang Province as the research object,determines the flow coefficient of Anbang River diversion gate through experimental study,and lays the foundation for the optimal allocation of the diversion amount of Anbang River diversion gate and the water resources in the irrigation area.During the rice growing period to the mature stage in the irrigated area,the hydrological monitoring was carried out on the water level of the upper and lower reaches of the sluice,the instantaneous flow of the lower reaches and the gate opening degree of the sluice.Based on the statistical calculation,the correlation between the flow coefficient and the difference of water level between upstream and downstream of the gate,the relative opening degree of the gate and the downstream flow rate are analyzed.The results show that the gate flow coefficient is positively linearly correlated with the gate relative opening and the downstream flow,and negatively linearly correlated with the upstream and downstream water level difference of the gate,and the correlation coefficients are all above 0.80.This study provided theoretical support for the accurate calculation of channel diversion water amount and the optimization of channel water distribution and distribution by determining the discharge coefficient of the water inlet gate of the Anbang River through experiments,and was of great significance for the further development of the optimal allocation of water resources in Heping Irrigation Area.