小底坡梯形明渠临界水深求法探讨

本文提出了一条求解小底坡梯形明渠临界水深的新途径——预估修正法。方法以简单的数值逼近原理为基础,没有繁复的数学推导,也不需要物理假设,所以使用时不必依赖图表。数值实践证明:该方法简单易行,且仍能保证较高的精度,可供工程实际推广应用。

A Method for Calculating Critical Water Depth of Open Channel with Trapezoid Section and Smooth Slope

This paper presents a new way, i. e. , a advance estimate modified method, for calculating critical water depth of open channel with trapezoid section and smooth slope. The method simply depends on the theory of numerical value approximation. Complex methematic derivation and physical hypothesis are not used. The user need not look through a table or figure to determine empirical coefficients. Numerical experiments show that the method is simple and the evaluation has relatively high accurate. The method can be widely used in engineering practice.