| 摘要: |
| 试验利用盐度（S）、温度和紊动剪切强度（G）同时可控的沉降桶，开展黄河口黏性泥沙絮凝系列试验，分析并厘清盐度和紊动剪切共同作用对黄河口黏性泥沙絮凝沉降的影响机制；基于正态分布的多元非线性回归模型，建立了絮凝体沉降速度与紊动剪切强度、盐度间的相关关系式，揭示出絮凝体沉降速度和粒径均随着紊动剪切和盐度的增大呈现先增大后减小之规律。试验研究发现，黄河口泥沙的最佳絮凝条件为G=15 s-1、盐度S=7~10‰。 |
| 关键词: 黄河口 黏性泥沙 多元非线性回归模型 紊动剪切强度 盐度 |
| DOI： |
| 分类号: |
| 基金项目:NSFC—山东省政府联合基金(U2006227,U1906234) |
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| Experimental study on flocculation settlement of viscous sediment in the Yellow River Estuary under the influence of turbulence and salinity |
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Chen Baiwen,Shi Bing,Wang Junjie
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1.College of Civil Engineering, Ocean University of China;2.Ocean University of China
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| Abstract: |
| A series of experiments on flocculation of viscous sediment in the Yellow River Estuary were carried out by using a settling barrel controlled simultaneously by salinity (S), temperature and turbulent shear strength (G), and the mechanism of influence of salinity and turbulent shear on flocculation settlement of viscous sediment in the Yellow River estuary was analyzed and clarified;based on the multivariate nonlinear regression model of normal distribution, the relationship between flocculation settling velocity and turbulent shear strength and salinity has been established. It is revealed that flocculation settling velocity and particle size increase first and then decrease with the increase of turbulent shear and salinity. It was found that the optimum flocculation conditions of sediment in the Yellow River Estuary were G=15 s-1 and salinity S= 7~10 ‰. |
| Key words: Yellow River Estuary Viscous sediment Multiple nonlinear regression model Turbulent shear strength salinity |
