明渠临界水深计算方法总论

总结了近30年来各种断面明渠临界水深的计算方法,并经分析与比较,通过最优迭代与拟合处理及误差分析,优选出各种典型渠道断面临界水深计算的一系列解析计算公式,该系列公式简捷、准确、通用。综合评价结果表明:各方法的最大误差不超过2%,多数最大误差小于1%,能满足生产实践的需要。

Pandect for the calculating methods of the critical depth of opening channel in different typical cross sections

The paper summarized the calculating methods of the critical depth of opening channel in different typical cross sections in the past three decades. After comparing the forms and the errors of all ,the authors selected an optimum iterative method to deal with the items,and gave a series proper equation to meet the demands of engineering practice. These equations are simple ,accurate and commonly used. The errors of these equations are within 2%,most of them are less than 1%. The new method of the paper will give enlightenment in solving problems of transcendental equation with several unknown parameters.