Experimental Study on Sediment Settling of Xiaolangdi Reservoir
Sediment settling velocity is an important parameter in particle suspension and indispensable link of hyperconcentrated flow as well as basic theory support for efficient sediment transport of Xiaolangdi Reservoir.This paper has adopted current sediment sample in Xiaolangdi Reservoir to take still water settling experiment,observed carefully silt sediment distribution during different settling duration under various initial concentrations,analyzed common settling velocity calculation method,and adopted settling duration curve method as calculation method to obtain a constant settling velocity of free settling section.Typical settling velocity that is obtained from experiments makes supplement and fitness to settling velocity formula of the existing groups of sediment sample,amends the formula coefficient,further explore the settling characteristics and settling velocity of fine particle mixed viscous sediment with water concentration change,and meanwhile this paper researched settling distance impact on settling velocity,existing sediment group settling transition to mesh settling critical transition silt concentration of Xiaolangdi Reservoir.This paper has analyzed the relationship between settling velocity of muddy surface and settling velocity of mixed sediment group,and discussed silt concentration change trend with time of the muddy water below the muddy surface after settling.
settling duration curve method settling velocity mixed sediment critical silt concentration muddy surface
Jiang Siqi Wang Hongwei Chen Shukui Li Tao LiPin
Yellow River Institute of Hydraulic Research, YRCC, Key Laboratory of Yellow River Sediment Research Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 450003, China
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
180-185
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）