沙质推移质断面输沙率计算方法

当今众多推移质计算公式 ,其成果都与实际难符。本文对泥沙统计理论建立的单宽输沙率公式、给各符号的确定方法进行了优选 ,只需根据水文站日常测验中得到的有关资料 ,即可求出单宽输沙率的沿河宽分布曲线 ;沿河宽积分 ,则可求得相应断面推移质输沙率。本方法与各家公式对比 ,其成果接近恩格隆公式 ,经长江三个站实测资料验证 ,实际误差与当前测验精度一致。具有实用意义。

A Calculation Method of Sand Bed Load Rate

At present, there are a great many calculating formulas of bed load; nevertheless, the calculating result disagrees with the actualities. This article deals with the formula of bed load rate per unit width based on sediment statistic theory, and deals with the optimization of the determination methods for all its parameters; thus, it can be solved by determining the distribution curve of bed load rate per unit width along the river width just according to the daily relevant data observed by the hydrometric station. That is to say, in the case of intergrating the above mentioned distribution curve along the river width, then the total bed load transport rate of river cross\|section can be determined.Comparing the calculating results by the method suggested by the authors of this paper is much more closed to the results of F.England formula:it has been tested by the data of three of the hydrometric stations of the Yangtze River. The actural error and the obseration accuracy are in agreement. There is practical value in doing that.