黏性泥沙絮凝研究现状与进展

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...

Research Status and Progress of Cohesive Sediment Flocculation

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.