粗沙高含沙浑水的沉降特性及粗泥沙的群体沉速

由粗沙高含沙浑水的静水沉降试验资料，分析得出只有在含沙量接近极限含沙量时，垂线含沙量及级配分布才会均匀稳定，并与前人在水槽形成层移质的体积比含沙量Ｓｖ＝０．４５一致；含沙量小于极限含沙量时，垂线含沙量及级配分布都有梯度。通过分析论证，发现若用浑水的容重、粘性代替清水的容重、粘性，则沙玉清介流区单个球体沉速公式可用以计算粗颗粒泥沙的分组群体沉速。

Deposition Characteristic of Coarse and High Silt-content Turbid Water and the Mass Deposition of Coarse Silt

With the stilling water deposition test information of coarse and high silt-content turbid, it is analyzed that only when the silt content approached maximum silt content can vertical line silt content and its gradation distribution be mean and stable. and equals Sy=0. 45 which is the ratio of interval load formed in the water channel against the silt content: when the silt content is less than maximum content, vertical line silt content and its gradation distribution appear gradient.Through analysis and proof it was found that if the bulk density and the gummosity of clear water were replaced with those of turbid water, the formula of deposition rate of single ball in Sha Yuqing medium flow zone can be used to calculate the group mass deposition rate of coarse silt.