推移质输沙量的计算及其应用

摘要

A new method is proposed to estimate annual amount ofbed load, in which the typical hydrological year of discharge series isselected based on the relationship between the bed load rate and hydraulicfactors. The lateral non-uniform bed load transport along the crosssection is accounted for by dividing the basic section into certainnumber of sub-sections in which the bed load rate is calculated in termsof local velocities. In addition, the time-variation of size grading ofbed load is taking into consideration. Finally, the method is applied tothe Qingtongxia Reservoir. The estimated annual bed load amount agreeswell with that observed.%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.