水利学报2017，Vol.48Issue(12)：1465-1472,8.DOI:10.13243/j.cnki.slxb.20170468
冲积河流沙质河床推移质级配分布规律
Bed load graduation of sandy bed in alluvial river
摘要
Abstract
Bed load graduation of sandy bed in alluvial river is a key in the calculations such as bed load transport rate,riverbed erosion and siltation.In this paper,pattern of critical condition of sediment transport in near-wall region of sandy bed was analyzed firstly,and according to the law of momentum balance,the critical settling-rising condition of bed material in sandy bed was obtained.Based on the vertical instantaneous turbulent velocity abiding by Gaussian distribution,a theoretical relation for calculating bed load graduation in sandy bed was addressed by solving the stochastic equation.The formulae were verified by measured data from the Yellow and Yangtze Rivers,and the results showed that the measured data agreed well with proposed formulae.This study has theoretical significance and practical value for determining bed load graduation of sandy bed in alluvial river.关键词
泥沙级配/推移质/紊流/动量/沙质河床Key words
Graduation/Bed load/Turbulence/Momentum/Sandy bed分类
建筑与水利引用本文复制引用
张罗号,张红武,赵晨苏..冲积河流沙质河床推移质级配分布规律[J].水利学报,2017,48(12):1465-1472,8.基金项目
国家重点研发计划项目(2016YFC0402500) （2016YFC0402500）
