论述了椒江河口粘性细颗粒泥沙洪、枯季及大、小潮悬沙浓度分布．椒江河口水体高度混浊，近底层悬沙浓度可达71kg／m3以上．在河口最大混浊带，小潮期水体层化现象明显，悬沙浓度垂向分布呈三层结构，即活动悬沙层、泥跃层和浮泥层．泥跃层是水体中悬沙浓度分布剧变层，梯度大．在河口咸、淡水互相作用下，悬沙浓度大于3kg／m3、盐度在4～16及水流速度中等的条件下泥跃层发育． Discusses the Jiaojiang River Estuary viscous fine sediment, dry season and the distribution of suspended sediment concentrations. Jiaojiang Estuary high water turbidity, the concentration of suspended sediment near the bottom up to 71kg / m3 or more. At the estuarine maximum turbidity zone, the phenomenon of water stratification is obvious in the small tide period. The vertical distribution of suspended sediment concentration has a three-layer structure, namely, the activity of suspended sediment, mud jump and floating mud. The mud jump layer is a drastic change in suspended sediment concentration distribution in water with a large gradient. Under the salt water and freshwater interaction in the estuary, the concentration of suspended sediment is more than 3 kg / m3, and the development of mud climates under the condition of salinity between 4 and 16 and moderate water velocity.