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针对二次抛物线形断面渠道均匀流水深计算存在的问题,采用优化拟合的方法,通过对二次抛物线形断面渠道均匀流水深计算公式的拟合,得到了表达形式简单、计算过程简捷、实用范围广、便于工程设计人员实际应用的近似计算公式。误差分析及算例计算表明,在工程实用范围内,该公式的无量纲水深最大拟合相对误差为0.257%,均匀流水深计算最大相对误差为0.513%,完全满足实际工程的水力计算及设计精度要求。
Aiming at the problems existing in the calculation of uniform flow depth in the second parabolic cross-section channels, the method of optimal fitting is adopted. Through fitting the calculation formula of the uniform flow depth in the second parabolic cross-section channels, the expression form is simple and the calculation process is simple and practical. A wide range of engineering design staff to facilitate the practical application of the approximate formula. Error analysis and example calculation show that the relative error of maximum fitting of dimensionless depth is 0.257% and the maximum relative error of uniform flow depth is 0.513%, which fully meets the requirements of hydraulic calculation and design accuracy of practical engineering Claim.