摘要
自然条件下的海滩并非由均一粒径的泥沙组成,在波浪作用下会发生泥沙分选。本文针对全级配沙床,开展水槽试验,研究不同波浪动力对海滩沙垂向分异特征的影响。实验结果表明:波高对海滩沙垂向粒度分异性结果影响较大,大波高作用下沙坝处垂向泥沙粒度变化受波浪影响深度达8cm;小波高作用下,由于波能相对较小,波浪第一次触底产生的紊动较弱,使得垂向泥沙粒度变化较小。相同波高不同周期波浪作用下的垂向泥沙分异特征的差异主要表现在上冲水流和重力回落流共同作用下携沙能力的不同。
The beach under natural conditions is not composed of sediments of uniform particle size,and sedimentation occurs under the action of waves.In this paper,a full-scale sand bed is set up and a flume test is carried out to study the effect of different wave dynamics on the characteristics of vertical dissimilarity of beach sand.The experimental results show that the wave height has a great influence on the vertical grain size variation of beach sand,and the deeper wave height influences the deeper depth,and the sediment movement pattern is more.Under the action of wavelets,the wave energy is relatively small.The turbulence generated at the bottom is weak when the wave touches beach for the first time,and the vertical sediment particle size changes little.The difference in characteristics of vertical sediment dissimilarity under the same period of wave height and different periodic waves is mainly reflected in the difference in sediment carrying capacity under the combined effect of the upper flushing flow and gravity falling flow.
作者
杨亚迪
郑建国
岳帅
陶威
刘文帅
许国辉
YANG Ya-Di;ZHENG Jian-Guo;YUE Shuai;TAO Wei;LIU Wen-Shuai;XU Guo-Hui(Ocean University of China Key Laboratory of Marine Environment and Ecology,Ministry of Education;Ocean University of China Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering;Ocean University of China College of Environmental Science and Engineering,Qingdao 266100,China)
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第A01期123-130,共8页
Periodical of Ocean University of China
基金
国家自然科学基金项目(41576039)资助~~
关键词
海滩
分选
垂向分异
水槽试验
beach
sorting
vertical differentiation
flume text
