【摘要】 常用的推移质输沙率公式多指单位河宽的输沙率计算。对于全断面的输沙率则涉及推移质输沙带的宽度和横向输沙率分布。本文以岷江都江堰河段卵石推移质输沙率的横向分布实测资料为基础 ,建立了用自然对数函数描述横向分布的概率分布函数。并对横向强输沙区 ,弱输沙区和不输沙区给出了量化指标。更多还原

【Abstract】 Based on the field observed data of transverse distribution of pebble bed-load transport rate in the Dujiangyan reach of Mingjiang River, a natural logarithm function is constructed to describe this stochastic behavior. According to the incoming condition of flow and sediment, the width of different bed-load zone in cross-section, the corresponding quantity of bed-load and it’s percentage of the total bed-load can be determined.更多还原