水道港口2025，Vol.46Issue(3)：350-356,7.
规则波作用下斜坡上粉沙起动研究
Incipient motion of silt sand on sloped bed under regular waves
摘要
Abstract
Sediment incipient motion is a fundamental aspect of sediment transport along estuarine coasts.However,the incipient motion of sediment on slope beds under wave action has rarely been studied.This paper investigated the incipient motion of sediment on sloped beds under regular wave action through physical modelling experiment.The wave flume was 60 m long,2 m wide and 1.8 m high.The sediment incipient motion experiment was composed of a sloped and horizontal bed covered with fine sand.The slope gradient was 1:10,and the experimental sediment was Yellow River estuary silt sand with d50=0.038 mm.The incipient motion of sediment was visually determined by slowly varying both wave height and period when three different water depths were used respectively.There were 16 wave gauges(WGs)collecting the wave data,and three Acoustic Doppler Velocimeters(ADVs)were used to measure instantaneous wave orbital velocities which were closed to sloped beds.The experimental results have shown that the incipient velocities of sediment particles on a sloping bed are function of sediment characteristics,bed slope,and nearbed semi-excursion of wave motion A.It decreases with increasing bed slope,while increases with the enlargement of nearbed semi-excursion of wave motion A and asymptotically approaches a constant value.This paper clearly illustrates the different mechanisms of sediment incipient velocities with sloped and horizontal beds.关键词
粉沙起动/波浪/斜坡地形/起动流速/规则波Key words
slit sand incipient motion/wave action/sloped bed/sediment incipient velocity/regular wave分类
交通运输引用本文复制引用
房克照,李彬,尤再进,王召伟,李德龙..规则波作用下斜坡上粉沙起动研究[J].水道港口,2025,46(3):350-356,7.基金项目
国家重点研发计划项目(2023YFC3007900) （2023YFC3007900）
国家自然科学基金项目(52071057) （52071057）
中央高校基本科研业务费专项资金项目(3132023504) （3132023504）
