紊动与盐度共同作用的黄河口黏性泥沙絮凝沉降试验研究  

Experimental investigation of flocculation settlement in the Yellow River Estuary for viscous sediment considering the impact of turbulence and salinity

作　　者：陈柏文 拾兵[1] 王俊杰[1] 巴彦斌 CHEN Baiwen;SHI Bing;WANG Junjie;BA Yanbin(College of Civil Engineering,Ocean University of China,Qingdao 266100,China;Yellow River Estuary Administration Lijin Yellow River Bureau,Dongying 257091,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]黄河河口管理局利津黄河河务局,山东东营257091

出　　处：《水利水运工程学报》2024年第2期91-99,共9页Hydro-Science and Engineering

基　　金：NSFC-山东省政府联合基金资助项目(U1906234,U2006227)。

摘　　要：为研究多因素共同作用对黄河口黏性泥沙絮凝沉降的影响,利用盐度、温度和紊动剪切率同时可控的沉降桶,开展黄河口黏性泥沙絮凝沉降系列试验,分析并厘清了盐度和紊动剪切率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率、盐度间的关系式,揭示出絮凝体沉降速度和粒径均随着紊动剪切率和盐度的增大呈现先增后减的规律。试验研究发现,黄河口泥沙最佳絮凝条件为紊动剪切率13~15/s、盐度7‰~10‰。研究结果有助于更好认识黄河口黏性泥沙颗粒的絮团发育和沉降过程。This study aimed to investigate the impact of various factors on the flocculation settlement of viscous sediment in the Yellow River Estuary.A series of experiments were conducted using a settling barrel that simultaneously controlled salinity,temperature and turbulent shear rate.The study analyzed and elucidated the influence of salinity and turbulent shear rate on the flocculation settlement of viscous sediment in the Yellow River Estuary.By employing a multivariate nonlinear regression model based on the normal distribution,the relationship between flocculation settling velocity and turbulent shear rate and salinity was established.The findings revealed that the flocculation settling velocity and particle size initially increased and then decreased with an increase in turbulent shear rate and salinity.Optimal flocculation conditions for sediment in the Yellow River Estuary were found to be a turbulent shear rate of 15/s and a salinity range of 7‰to 10‰.The research results provide a reliable reference for better understanding the development of flocs and the settling process of fine viscous sediment particles in the Yellow River Estuary.

关 键 词：黄河口 黏性泥沙 多元非线性回归模型 紊动剪切率 盐度 

分 类 号：TV148[水利工程—水力学及河流动力学]