Determination of flow coefficient at canal head gate in Nanweizi Irrigation District of Dongliao River
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Abstract:
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 wa 2 ter level difference of gate upstream and downstream, flow coefficient and relative opening degree of the gate, and flow coeffi 2 cient 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.
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