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本文指出对 Chézy 公式不能看作只是经验公式,而是有一定理论根据的、明槽均匀流的基本公式。属于经验公式的是有关 Chézy 系数 C 的用糙率 n 分级的算式,它起了历史作用,今后仍将长期流行,但不可能成为反映客观规律的公式。文中还介绍了近代水力学家用流场分析法确定Chézy 系数的成果和存在的问题,以及笔者关于 Chézy 公式和 Chézy 系数的见解。
This paper points out that the Chézy formula can not be regarded as just an empirical formula, but has a certain theoretical basis, and the basic formula of uniform flow in a straight slot. What belongs to the empirical formula is the formula for grading with the roughness n for the Chézy coefficient C, which has a historical function and will continue to prevail in the long run, but can not become a formula that reflects objective laws. In the paper, the achievements and existing problems of Chézy coefficient determined by flow mechanics analysis by modern hydrologists are introduced, and the author’s opinions on Chézy formula and Chézy coefficient are also introduced.