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该文采用2009年至2011年屏南水文站在低水控制坝测流槽的实测流量成果,率定测流槽公式参数,建立低水控制坝测流槽流量计算公式。采用测流槽公式计算的水位流量关系经符号检验、适线检验、偏离数值检验,成果符合水文整编规范要求,推算的年平均流量与当年流量的误差在1.6%以内,成果良好,表明屏南水文站低水控制坝测流槽流量可用率定的测流槽公式推求。建议其它水位流量关系不稳定的小河站可采用修建控制坝测流槽的方法解决测站低水测流问题和低水无控制问题。
In this paper, the measured flowrate of Pingnan Hydrological Station at low water control dam from 2009 to 2011 was used to determine the parameters of runner formula, and the formula for calculating flow rate of low water control dam was established. The relationship between the water level and the flow rate calculated by the trough formula was verified by the sign test, the fitness test and the deviation from the numerical test. The results accorded with the requirements of the hydrological reorganization code. The estimated annual average flow rate was within 1.6% of the current flow rate and the result was good. Hydrological station low water control dam measuring runner flow rate availability of the determination of runner formula. It is recommended that other stations with unstable water level flow relations can solve the problems of low water flow measurement and low water non-control by adopting the method of measuring the trough of the control dam.