摘要
使用波潮仪、流速计以及浊度计现场测量记录海堤前的波高、潮高、流速和浊度值,与室内测定的浊度和水中悬浮颗粒物含量对应值比较,分析计算浊度与现场测量波高、潮高、流速水动力因素间的相关性,得出堤前泥沙起动的决定性水动力因素。在悬移质运移为主情况下,由于海堤的阻挡,波浪破碎产生的旋涡和紊动是泥沙起动的主要动力因素,泥沙起动量与波高值呈现较高相关性;海堤前复杂水动力条件中,波浪破碎前的流速值与悬移质泥沙起动量相关系数较小,启动流速的主要组成部分是破波产生的旋涡和紊动的流速。
With the aid of a wave-tide gauge, current meter and turbidity meter, the in-situ values of wave height, tidal height, current velocity and turbidity value were recorded, and compared with the values of turbidity and contents of suspended particles measured in the lab coratory, so that the correlations were obtained between turbidity and such in-situ hydrodynamic parameters as wave height, tidal height and current velocity, and the hydrodynamic factors determining sediment incipient motion velocity before breakwater are found to be different from those in the sediment incipient motion theory： when suspended loads prevail, wave height are the determinant factor, suspending soil particles is caused by the swirl and turbulence generated by wave breaking; and the incipient motion quantity of sediments is positively correlated with wave height; in the complicated conditions before breakwater, the correlation between the current velocity before wave breakin and the incipient motion guantity ty is relatively small, implying that the incipient velocity is mainly caused by the velocities of swicls and turbulence generated by wave breaking.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第5期825-828,814,共5页
Periodical of Ocean University of China
基金
国家自然科学基金项目(40472137)资助
关键词
黄河三角洲
堤前泥沙起动
波浪要素
起动流速
现场观测
the Yellow River Delta
sediment incipient motion before breakwater
wave parameters
incipient motion velocity
in-situ measurement
作者简介
单红仙（1965-），女，博士，教授，从事海洋岩土力学教学与科研工作，E-mail：Hangxian@ouc．edu．cn.
