典型文献
A new mixing equation for bed material composition in bed form dominant conditions
文献摘要：
Vertical mixing beneath the bed surface and its effect on sediment composition has long been under-estimated.This paper proposes a mixing equation to illustrate the temporal and spatial variations of bed material composition for bed form dominant rivers.A continuous mass conservation equation for elevation-specific nonuniform bed material composition is initially presented.A vertical mixing equation is finally derived as a diffusion-type partial differential equation with a source term characterized by a vertical diffusion coefficient and the geometric dimensions of bed forms.Coupled with boundary con-ditions,this equation is further developed in a vertical mixing model at the scale of bed forms,in which the variations of bed material composition are clearly illustrated.The equation accounts for vertical exchange fluxes driven by bed form migration and their effect on bed material composition,which helps elucidate the mixing mechanism.In application to riverbed degradation,the proposed equation is capable to describe armoring development in consideration of the interior mixing,which provides more satisfying predictions for bed surface materials.The new mixing equation helps gain insight into pre-dicting the variations of bed material composition during morphological changes.
文献关键词：
中图分类号：
作者姓名：
Baozhen Jia;Deyu Zhong
作者机构：
State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;Joint-Sponsored State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016,Qinghai,China
文献出处：
引用格式：
[1]Baozhen Jia;Deyu Zhong-.A new mixing equation for bed material composition in bed form dominant conditions)[J].国际泥沙研究（英文版）,2022(04):435-446
A类：
armoring
B类：
new,mixing,equation,composition,dominant,conditions,Vertical,beneath,surface,its,effect,sediment,has,long,been,under,estimated,This,paper,proposes,temporal,spatial,variations,rivers,continuous,mass,conservation,elevation,specific,nonuniform,initially,presented,vertical,finally,derived,diffusion,type,partial,differential,source,term,characterized,by,coefficient,geometric,dimensions,forms,Coupled,boundary,this,further,developed,model,scale,which,are,clearly,illustrated,accounts,exchange,fluxes,driven,migration,their,helps,elucidate,mechanism,In,application,riverbed,degradation,proposed,capable,describe,development,consideration,interior,provides,more,satisfying,predictions,materials,gain,insight,into,dicting,during,morphological,changes
AB值：
0.498074
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