为研究不同波浪环境下，水底浮泥层产生泥沙悬扬后其浓度的分布特性，使用浊度计测定浊度的方法确定水体中泥沙的浓度，并在水槽实验中改变水深、浮泥厚度及造波机的频率和振幅，观察水槽中悬浮泥沙浓度的变化情况，获得水深、波浪频率、波幅以及浮泥厚度对底床泥沙悬扬的影响，分析泥沙浓度的垂向分布特征等。实验结果显示，水深对底床泥沙悬扬的影响最为显著，其他实验参数的影响均不十分显著。同时，通过垂向输沙平衡的分析，得到一个可描述泥沙垂向浓度分布的理论公式，并利用水槽实验结果进行验证。对比结果显示，理论公式所得曲线与实验结果曲线变化趋势一致，部分工况下，理论值稍稍偏大。%In order to obtain the distribution characteristics of the concentration of bot-tom fluid mud resuspension caused by the actions of different waves,the sediment con-centration in the water is determined by using the method for turbidity determination with a turbidimeter.By changing the water depth,the fluid mud thickness and the fre-quency and amplitude of the wave maker in the flume experiments,the variations of the concentration of the suspended sediment in the flume as well as the influences of the wa-ter depth,wave frequency and amplitude and fluid mud thickness on the resuspension of the bottom sediment are all observed,and then the vertical distribution features of the suspended sediment concentration are analyzed.The results from the experiments have show that the water depth exerts the most significant influence on the resuspension of the bottom sediment,and that the effects of other experimental parameters are not very significant.By the analysis of vertical sediment transport equilibrium,a theoretical for-mula which can describe the vertical distribution of the fluid mud concentration is work out and verified by using the flume experimental data.The results show that the curves obtained by using the theoretical formula have a consistent changing tendency with those resulted from the experimental data,with the exception that in some cases the theoreti-cal values are slightly higher.
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