四川水力发电2023，Vol.42Issue(z2)：1-8,14,9.
结合粒径分布测量的悬移质泥沙沉降速度试验探究
Experimental Study on Suspended Load Settling Velocity in Water Combined with the Measurement of Particle Size Distribution
摘要
Abstract
The determination of settling velocity is very important for the study of sediment transport and spati-otemporal distribution in water.In this paper,the non-uniform settling process of uniform sediment particles in the initial stage of settling is theoretically analyzed.On the basis of the existing settling test,the measure-ment of sediment particle size gradation has been done,and an improved experiment method is proposed to es-tablish a corresponding relation between settling velocity and particle size.This method considers the influence of interactions on settling velocity under the coexistence of different components of sediment and establish a good exponential function relation ω=0.0105e0.1031D between the settling velocity and particle size 0.01-0.06 mm of suspended sediment in water,which is more accurate than theoretical calculation values and traditional test method.The research results in this paper have important theoretical value and engineering significance for the research on river channel evolution and settling process after dam removal in natural rivers.关键词
悬移质/粒径分布/沉速Key words
Suspended load/Particle size distribution/Settling velocity分类
地球科学引用本文复制引用
张天予,李茜,冯镜洁,文典,李然,袁雨亮,王振华,黄杰山..结合粒径分布测量的悬移质泥沙沉降速度试验探究[J].四川水力发电,2023,42(z2):1-8,14,9.基金项目
国家自然科学基金重点项目(52039006),国家自然科学基金长江水科学研究联合基金资助(U2240212) （52039006）
