Experimental Study of the Feature of Cohesive Sediment Movement with the Lower Energy Conditions
Cohesive sediment is a major component of clay.Its erosion and movement has a significant impact on the soil environment.Moreover,cohesive sediment is an important part of the sediment of lakes and oceans,-moreover,its movement and transportation also have a crucial influence over dispersion of pollutants in water.Open channel flume experiments were carried out to study the characteristics of cohesive sediment movement;simultaneously the velocity and sediment concentration vertical profile was investigated.The experimental restdts indicate that under the conditions of suitable hydrodynamic velocity and sediment concentration,a special-shaped sediment flow,stratified movement,takes place in the flume.Its formation and features are closely related to fluid parameters and sediment concentration.Its velocity distribution shows a V-shaped pattern falling forward.At the corner of V,the maximum velocity is vertically located in the middle of the flume.The concentration distribution is vertically stratified into three discrete layers on whose interlaces the concentrations change suddenly.To form lamination movement,different hydrodynamic conditions are required under different sediment concentrations.When the concentration increases,the corresponding flow intensity also-rises up.
cohesive sediment lamination movement flocculation net structure velocity distribution
Wang Jiasheng Chen Li Lu Jinyou He Shan
Changjiang River Scientific Research Institute, Wuhan, 430010, China Water Resources and Hydropewer Engineering Science,Wuhan University State Key Laboratory, Wuhan, 430
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
410-416
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）