推移质输沙率公式比较与分析

The Comparison and Analysis for bed load transport rate formula

推移质输沙率是河流动力学中一个十分重要的问题。本文在前人研究推移质输沙率的基础上,总结了6个典型的推移质输沙率计算公式。把单宽输沙率都统一转化成推移质输移浓度的形式,并运用大量的试验水槽资料验证比较。比较结果表明,相对误差最大的是恩格隆公式,高达118.6%;相对误差最低的为梅叶-彼德公式,为39.1%;精度由高到低依次为Meyer-Peter公式,窦国仁公式,Ackers and White公式,Yalin公式,Sharmov公式,Engelund公式。该研究可为工程人员选择公式提供参考。

Load transport rate is a very important issue in the dynamics of the river.This article summarizes the six typical bed load transport rate which is calculated base onthe previous studies of bed load transport rate; the Single-wide sediment transport rates are unified into the form of bed load transport density,and a large number of theflume data validation is compared.The comparison shows that the largest relative errorcreated by Enge Long formula, up 118.6 percent; the lower relative error by Peterformula, 39.1% ; descending order of ac- curacy is Meyer-Peter formula, Douguorenformula,Ackers and White formula, Yalin formula, Sharmov formula, Engelund formula.The study can provide references for engineers to selection formulas.