Erosion control of hedgerows under soils affected by disturbed soil accumulation in the slopes of loess plateau, China

doi:10.1016/j.catena.2019.104079

	Erosion control of hedgerows under soils affected by disturbed soil accumulation in the slopes of loess plateau, China
	Yang, Shuai 1,2; Gao, Zhao-liang 1,3; Li, Yong-hong 1,3; Niu, Yao-bin 3; Su, Yuan 1,2; Wang, Kai 1
刊名	CATENA
	2019-10-01
卷号	181 页码:13
关键词	Disturbed soil accumulation Hedgerows Flow discharges Erosion control
ISSN号	0341-8162
DOI	10.1016/j.catena.2019.104079
通讯作者	Gao, Zhao-liang(gzl@ms.iswc.ac.cn)
英文摘要	Soil erosion on disturbed soil accumulations severely threatens the ecological stability of construction sites and their surrounding areas. This study aims to quantify the effects of hedgerows on the hydraulic characteristics of runoff and understand the mechanism of runoff and sediment reduction of hedgerow slopes. A field scouring-erosion experiment was conducted on a typical spoiled ground in "Changwu Agricultural Ecological Experimental Station" of the Loess Plateau in China to explore the effects of hedgerows on erosion control in slopes of disturbed soil accumulation. In experiments, 6 plots, which consisted of three hedgerow plots (H) and three control plots of bare slope (C), with a uniform size of 20 m, 5 in width, and 0.5 m height were constructed with excavated soil. By using three different flow discharges (35, 45, and 55 L/min) on the slope with three different gradients (24 degrees, 28 degrees and 32 degrees), some essential parameters, rate of sediment yield, sediment concentration of runoff, sediment reduction, shear stress, denudation rate, and runoff power, were measured for mechanism analysis. The hedgerows could delay runoff, which meant the initial runoff time of hedgerows obviously lagged behind the control plot about 1-8 min. The capability of runoff generating control by the hedgerows depended on the duration of discharge, which grew first and reduced later. At the later stage, the sediment concentration in the runoff of the hedgerow plots exceeded the control plots, which could be related to transformation of hedgerows between source and sink. The accumulated sediment yields of the hedgerow plots were reduced by 10-45% compared to the control plots. The relationship of the reduction of accumulated sediment yield and duration of discharge could be stated with quadratic function (P < 0.01), which indicated critical runoff time was advanced with increase of slope and flow discharge. Based on the runoff power, the soil erodibility parameter of the hedgerow slopes (3.58 g.N-1.m(-1)) was larger than that of the control slopes (2.83 g.N-1.m(-1)). Hedgerows could hinder soil transport, which not only reduced soil peeling, increased critical shear stress, and critical runoff power but also curbed rill evolution in the lower slope erosion process. The important parameters from this study would be helpful for optimal allocation of hedgerow measures, erosion control and erosion prediction model establishment on disturbed soil accumulation.
资助项目	National Key Research and Development Program of the 13th Five-Year Plan[2016YFC0501706-02] ; National Natural Science Foundation of China[41671283]
WOS关键词	WATER EROSION ; GRASS HEDGES ; SEDIMENT ; RUNOFF ; SYSTEMS ; RAINFALL ; HYDRAULICS ; MANAGEMENT ; VEGETATION ; VELOCITY
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000477686600031
资助机构	National Key Research and Development Program of the 13th Five-Year Plan ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/58060]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Zhao-liang
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Northwest Agr & Forestry Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shuai,Gao, Zhao-liang,Li, Yong-hong,et al. Erosion control of hedgerows under soils affected by disturbed soil accumulation in the slopes of loess plateau, China[J]. CATENA,2019,181:13.
APA	Yang, Shuai,Gao, Zhao-liang,Li, Yong-hong,Niu, Yao-bin,Su, Yuan,&Wang, Kai.(2019).Erosion control of hedgerows under soils affected by disturbed soil accumulation in the slopes of loess plateau, China.CATENA,181,13.
MLA	Yang, Shuai,et al."Erosion control of hedgerows under soils affected by disturbed soil accumulation in the slopes of loess plateau, China".CATENA 181(2019):13.