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梯形明渠临界水深计算方法已有近３０种，本文在分析总结前人研究的基础上，提出两套实用简捷计算法，以满足生产实践之需要．
There are nearly 30 kinds of calculation methods for the critical depth of trapezoidal open channels. Based on the analysis of previous studies, this paper presents two sets of practical and simple calculation methods to meet the needs of production practice.