摘要
将床面可动沙颗粒数视为一种随机过程 ,首次从理论上建立起冲刷粗化过程中输沙率变化的微分方程 ,据以解出输沙率随时间呈指数衰减规律变化的理论公式 .与部分实验资料的比较表明 ,公式在一定程度上与实际一致 .
The differential equation for transport rate of bedload in an armoring process is theoretically developed by considering the number of movable particles on the bed\|surface as a stochastic process. A theoretical relation of transport rate to the probability of incipient motion of nonuniform sediment is solved from the differential equation. According to this relation transport rate decreases exponentially with time. Comparison of the theory with experimental data shows a good agreement. Therefore, transport rate in the armoring process is theoretically described for the first time.
出处
《浙江大学学报（理学版）》
CAS
CSCD
2000年第4期449-453,共5页
Journal of Zhejiang University（Science Edition）
基金
国家自然科学基金!(5 97790 10 )
关键词
非均匀沙
推移质输沙率
粗化过程
随机过程
河流
nonuniform sediment
transport rate of bedload
armoring process
non\|equilibrium transport
stochastic process
