摘要
基于推移质输沙率与水流动力条件之间的关系，提出了一种计算年平均推移质输沙量时，代表性水流动力条件的选择方法，同时将断面分为若干子断面进行计算，可以解决推移质沿断面不均匀输移的计算困难，计算过程中还考虑了推移质级配的逐时变化．所提出的计算方法应用于黄河青铜峡水库，计算了年平均推移质量，结果与实测淤积量符合很好．
A new method is proposed to estimate annual amount of bed load, in which the typical hydrological year of discharge series is selected based on the relationship between the bed load rate and hydraulic factors. The lateral non-uniform bed load transport along the cross section is accounted for by dividing the basic section into certain number of sub-sections in which the bed load rate is calculated in terms of local velocities. In addition, the timevariation of size grading of bed load is taking into consideration. Finally, the method is applied to the Qingtongxia Reservoir. The estimated annual bed load amount agrees well with that observed.
出处
《力学与实践》
CSCD
北大核心
2000年第6期34-36,共3页
Mechanics in Engineering
关键词
推移质
输沙量
水流动力
推移质级配
bed load, annual bed load amount
typical hydrological year
size grading of bed load
