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介绍声散射器在河口近底细颗粒悬沙运动研究中的应用，并利用在长江口、杭州湾测得的粘性悬沙浓度垂向分布资料，来说明声学技术能成功地观测到河口高时空分辨率的悬沙浓度垂向分布。
This paper introduces the application of acoustic diffusers in the study of suspended sediment movement near the bottom of estuaries. Based on the vertical distribution data of suspended sediment concentrations measured in the Yangtze River Estuary and Hangzhou Bay, the acoustic techniques can successfully observed estuary spatiotemporal resolution The rate of suspended sediment concentration vertical distribution.