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利用1991年1月用水厂照相系统和自动图象分析仪等方法获得的悬浮体絮凝现场粒径资料，并结合温度、盐度及悬浮体总量等对伊姆斯－道拉德河口的悬浮体絮凝过程及其控制因素进行了研究。结果表明，絮凝物中值粒径为74－13μm；最大粒径为163－809μm，随时间、地点不同而不同。在时间上，絮凝颗粒大小的变化与潮汐变化相一致，以潮相为周期呈周期性变化。在涨落潮初期稍后絮凝颗粒迅速增大，后期逐渐变小；在空间上（沿河），一般向海颗粒较大。虽然，当悬浮体浓度达到峰值时絮凝物粒径往往出现延迟，但无论描系站还是沿河飘流站絮凝颗粒大小与息浮体含量之间都呈现正相关，而与盐度、温度和有机组分的相关很差。由于受余流等的影响，水体不能完全稳定下来，在下一个潮周期来临时，絮凝颗粒并非完全沉降，部分颗粒仍停留在水体中参与下一周期的循环。这些颗粒的大小涨落潮有别，中值粒径变化在74－101μm之间，最大粒径变化在163－382μm之间。这反映了悬浮体絮凝和絮凝过程主要受潮流及其导致的水动力作用的控制。
The particle size data of the flocculation field obtained from the waterworks photographic system and the automatic image analyzer were used in January 1991 and combined with the suspension of the Elm-Daurad estuary in terms of temperature, salinity and total suspended solids Body flocculation process and its controlling factors were studied. The results showed that the median diameter of floc was 74-13μm and the maximum particle size was 163-809μm, which varied with time and place. In terms of time, the flocculation particle size changes are consistent with the tidal changes, periodically changing with the tidal phase. Flocculation particles rapidly increase later in the tide and then gradually become smaller; in space (along the river), particles are generally larger in the sea. Although there is often a delay in flocculation particle size when the concentration of suspended matter reaches a peak value, there is a positive correlation between the flocculated particle size and the amount of floating bodies in both the sedimentation station and the floating station along the river, but not with the salinity, temperature, The correlation is poor. Due to the residual flow and other impacts, the water body can not be completely stabilized. When the next tidal cycle comes, the flocculated particles do not settle completely, and some particles remain in the water body and participate in the next cycle. The size of these particles fluctuated, the median particle size changes between 74-101μm, the maximum particle size changes between 163-382μm. This reflects that the flocculation and flocculation processes of suspensions are mainly controlled by the tide and the hydrodynamic effects they cause.