Vertical concentration profile of nonuniform sediment
Vertical concentration profile of nonuniform sediment作者机构：Institute of Port Coastal and Offshore Engineering Zhejiang University State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin
出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))
年 卷 期：2021年第36卷第1期
页 面：120-126页
核心收录：
学科分类：0709[理学-地质学] 08[工学] 0708[理学-地球物理学] 0903[农学-农业资源与环境] 081502[工学-水力学及河流动力学] 0815[工学-水利工程]
基 金：supported by the National Key Research and Development Program (Grant No. 2016YFC040230502) the National Natural Science Foundation of China (Grant No. 91647209)
主 题：Nonuniform sediment Concentration profile Interaction coefficient
摘 要：A new formula for the concentration profile of nonuniform sediment is derived using the diffusion differential equation with equilibrium bed *** interaction coefficient for nonuniform sediment particles as a function of both relative diameter and geometric standard deviation of nonuniform sediment is taken into account in the settling *** diffusion coefficient is obtained from the logarithmic velocity *** new formula possesses several advantages as follows:(1) avoids theoretical defect of the Rouse formula,which states that the sediment concentration is infinite at the bottom and zero at the water surface.(2) suitable for an arbitrary fraction of nonuniform sediment,and(3) easy to apply with a simple *** formula yields less difference among concentration profiles for various particles than that for uniform sediment and reveals the law for fractional conce ntration distribution of nonuniform *** calculated concentration agrees well with the measured data from the Yangtze River.
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