Runoff erosion processes on artificially constructed conically-shaped overburdened stockpiles with different gravel contents: Laboratory experiments with simulated rainfall

doi:10.1016/j.catena.2018.12.010

	Runoff erosion processes on artificially constructed conically-shaped overburdened stockpiles with different gravel contents: Laboratory experiments with simulated rainfall
	Luo, Han 1,2; Rong, Yubo 1; Lv, Jiaorong 2; Xie, Yongsheng 1,2
刊名	CATENA
	2019-04-01
卷号	175 页码:93-100
关键词	Conical overburdened stockpiles Runoff Erosion process Gravel
ISSN号	0341-8162
DOI	10.1016/j.catena.2018.12.010
通讯作者	Luo, Han(hanl@ms.iswc.ac.cn)
英文摘要	Overburdened stockpiles during construction projects are typically loose mixtures with different proportions of fines and gravel. They are common sources of anthropogenic accelerated erosion that threatens environmental quality and the quality of life for people in many parts of the world. Overburdened stockpiles have unique three-dimensional shapes. However, studies with these materials are usually performed in traditional planar soil bins. Therefore, in this study, a specially designed mobile experimental device was used to accurately evaluate the runoff erosion process on overburdened stockpiles in a three-dimensional conical shape. A series of indoor rainfall simulation experiments at 60 mm/h rainfall intensity was conducted using material with different gravel contents (0%, 10%, 20%, 30%, and 40%). The results showed that the runoff rate and flow velocity exhibited the same trend, i.e., a rapid increase, followed by a slow increase and then stabilization. The runoff regime in all experiments manifested as laminar and subcritical flow during the runoff process. Re and Fr values were much smaller than those on two-dimensional plane simulation of overburdened stockpiles. The presence of gravel caused the runoff to be slow and stable. Runoff rate, flow velocity, Re and Fr values all decreased with increasing gravel content. The sediment yield decreased logarithmically in response to the increasing gravel content. The study findings are not only helpful for understanding the hydraulic characteristics and erosion features that characterize overburdened stockpiles, but also have implications for prediction models of soil and water loss from this material during production and use in construction projects.
资助项目	National Natural Science Foundation of China[41601300] ; National Key Research and Development Program of China[2016YFC0503702] ; Fundamental Research Funds for the Central Universities[2452016107] ; West Light Foundation of The Chinese Academy of Sciences[XAB2015B06]
WOS关键词	ROCK FRAGMENT COVER ; SOIL-EROSION ; LAND-USE ; INFILTRATION ; GENERATION ; SEDIMENT ; SURFACES ; IMPACT ; SLOPE ; PLOTS
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000459358500009
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for the Central Universities ; West Light Foundation of The Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49415]
专题	中国科学院地理科学与资源研究所
通讯作者	Luo, Han
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Luo, Han,Rong, Yubo,Lv, Jiaorong,et al. Runoff erosion processes on artificially constructed conically-shaped overburdened stockpiles with different gravel contents: Laboratory experiments with simulated rainfall[J]. CATENA,2019,175:93-100.
APA	Luo, Han,Rong, Yubo,Lv, Jiaorong,&Xie, Yongsheng.(2019).Runoff erosion processes on artificially constructed conically-shaped overburdened stockpiles with different gravel contents: Laboratory experiments with simulated rainfall.CATENA,175,93-100.
MLA	Luo, Han,et al."Runoff erosion processes on artificially constructed conically-shaped overburdened stockpiles with different gravel contents: Laboratory experiments with simulated rainfall".CATENA 175(2019):93-100.