典型文献
Influences of rock fragments on the hydraulics and erosion of concentrated runoff in steep spoil heaps on the Loess Plateau of China
文献摘要：
The soil-rock mixed spoil heaps are prone to severe soil erosion during heavy rain,causing severe land degradation and ecological and environmental damage.Nevertheless,past research on the erosion on spoil heaps has focused on soil particles that were readily eroded and disregarded the rock fragments(RF)that were not readily eroded.To explore the effect of the RF embedded in spoil heaps on the hydraulics of and erosion caused by concentrated runoff,scour-erosion experiments were implemented on three types of spoil heaps:RF=7％,RF=45％,and RF=69％.The RF clearly reduced runoff and erosion on steep spoil heaps.As the RF increased from 7％to 69％,the runoff intensity and runoff coefficient decreased by 72.9％-79.1％and 83.2％-84.1％respectively,and the sediment concentration,soil denu-dation rate,and total soil loss decreased by 36.0％-47.8％,83.7％-87.1％,and 87.0％-92.3％,respectively.Narrow rills were generated during the experiments,and the RF distinctly influenced the rill characteristics.High contents of RF restrained rill retreating and undercutting,and promoted rill widening.With an increase in RF,the flow shear stress and stream power gradually decreased,and the Darcy-Weisbach roughness coefficient increased.These findings imply that the RF dissipated the flow energy and reduced soil detachment capacity and sediment transport capacity.Soil detachment is strongly related to the Darcy-Weisbach roughness coefficient,Reynolds number,and runoff intensity,which may be the preferred descriptors of soil detachment.The current findings indicate that embedded rock fragments could effectively reduce soil loss on steep spoil heaps.
文献关键词：
中图分类号：
作者姓名：
Wenzhao Guo;Hongliang Kang;Xiao Yu;Wenlong Wang;Pei Tian
作者机构：
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Water and Soil Conservation,Northwest Agriculture&Forestry University,Yangling 712100,China;Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province,Central China Normal University,Wuhan 430079,China
文献出处：
引用格式：
[1]Wenzhao Guo;Hongliang Kang;Xiao Yu;Wenlong Wang;Pei Tian-.Influences of rock fragments on the hydraulics and erosion of concentrated runoff in steep spoil heaps on the Loess Plateau of China)[J].国际泥沙研究（英文版）,2022(05):553-562
A类：
spoil,heaps,denu,undercutting
B类：
Influences,rock,fragments,hydraulics,erosion,concentrated,runoff,steep,Loess,Plateau,China,soil,mixed,are,prone,severe,during,heavy,causing,land,degradation,ecological,environmental,damage,Nevertheless,past,research,has,focused,particles,that,were,readily,eroded,disregarded,RF,not,To,explore,embedded,caused,by,scour,experiments,implemented,three,types,clearly,reduced,increased,from,intensity,coefficient,decreased,respectively,sediment,concentration,total,loss,Narrow,rills,generated,distinctly,influenced,characteristics,High,contents,restrained,retreating,promoted,widening,With,flow,shear,stress,stream,power,gradually,Darcy,Weisbach,roughness,These,findings,imply,dissipated,energy,detachment,capacity,transport,Soil,strongly,related,Reynolds,number,which,may,preferred,descriptors,current,indicate,could,effectively
AB值：
0.421897
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