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以枯水季节大、小潮期３个时间连续（２５ｈ）站和１条纵剖面１０个瞬时观测站的悬沙粒径资料为基础，通过对悬沙不同粒级，中值粒径及粒度参数的计算和统计，本文讨论了悬沙粒径分布的区域变化和潮汐周期变化，并表明其主要受物质来源、底部沉积物再悬浮物质和絮凝沉降３个因素影响，其中第二个因素的作用大潮期比小潮期显著，第三个因素的作用小潮期则较大潮期明显。
On the basis of the data of suspended sediment size of 10 instantaneous observation stations in the dry season of large and small tide periods (25h) and 1 longitudinal section, the effects of different grain size, median diameter and grain size parameters This paper discusses the regional variations of the particle size distribution of the suspended sediment and the tidal cycle changes and shows that it is mainly affected by the source of the material, the suspended sediment at the bottom of the sediment and the flocculation and sedimentation of the three factors, of which the second factor Tidal period than the small tide significantly, the role of the third factor tidal period is more significant tide.