摘要
黏性泥沙絮凝机理研究对河口、水库、航道淤积治理及水环境保护具有重要意义。总结了泥沙絮凝研究中数值模拟、现场观测、室内试验等手段的试验装置和方法,阐述了紊动剪切率、盐度、悬沙浓度、有机质等因素作用下的泥沙絮凝研究成果。分析认为,在三维絮团结构观测、高浓度水体絮凝试验装置、多因素影响的泥沙絮凝,以及水流紊动与絮团特性对应关系的定量研究等方面存在不足。因此,应加强以下几方面研究:①絮凝观测装置研发;②水流紊动结构与絮团特性对应关系的定量研究;③多因素耦合试验;④絮团结构三维观测。
Study on the flocculation mechanism of cohesive sediment is of great significance to the treatment of deposition in estuaries,reservoirs and waterways and water environment protection.In this paper,we made a review on the equipment and methods used in numerical simulation,field observation and laboratory experiment of cohesive sediment flocculation,and also expounded the research achievements of sediment flocculation under the influences of turbulent shear rate,salinity,suspended sediment concentration and organic matters.Researches in the following fields are still inadequate:three-dimensional observation of floc structure,in-situ observation of flocculation in high-concentration water,sediment flocculation influenced by multi-factor,and the quantitative relation between flow turbulence structure and flocculation characteristics.Researches need to be strengthened in the following aspects:developing flocculation observation device;quantifying the corresponding relation between flow turbulence structure and flocculation characteristics;multi-factor coupling experiment;and three-dimensional structure observation of floc.
作者
李杰
杨文俊
景思雨
陈越
LI Jie;YANG Wen-jun;JING Si-yu;CHEN Yue(River Department, Yangtze River Scientific Research Institute, Wuhan 430010, China;Yangtze River Scientific Research Institute, Wuhan 430010, China;Department of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China)
出处
《长江科学院院报》
CSCD
北大核心
2022年第4期8-13,共6页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金项目(51527809)
中国长江三峡集团有限公司科研项目(0704106)。
关键词
黏性泥沙
絮凝装置
试验方法
影响因素
絮凝机理
cohesive sediment
flocculation devices
experimental methods
influencing factors
mechanisms of flocculation
