Characteristics of rill erosion in spoil heaps under simulated inflow: A field runoff plot experiment

doi:10.1016/j.still.2020.104655

	Characteristics of rill erosion in spoil heaps under simulated inflow: A field runoff plot experiment
	Niu, Yaobin 1,5; Gao, Zhaoliang 1,2; Li, Yonghong 1,2; Lou, Yongcai 1; Zhang, Shuai 1; Zhang, Letao 3; Du, Jie 4; Zhang, Xiang 6; Luo, Ke 7
刊名	SOIL & TILLAGE RESEARCH
	2020-08-01
卷号	202 页码:11
关键词	Spoil heaps Rill morphology Hydrodynamic characteristics Soil detachment rate Loess plateau
ISSN号	0167-1987
DOI	10.1016/j.still.2020.104655
通讯作者	Gao, Zhaoliang(gzl@ms.iswc.ac.cn)
英文摘要	As newly artificial landform, soil erosion of spoil heaps severely threatens the ecological security of construction sites and their surrounding areas. Generally, rill erosion is recognized as an important process of soil erosion on spoil heaps slope. However, studies on spoil heaps rill erosion characteristics and its intrinsic mechanisms are still unclear. The objectives of this study were to investigate the rill morphological characteristics, rill flow hydraulic characteristic and dynamic mechanisms. A field runoff plot (10m long, 1m wide and 0.5m deep) was subjected to inflow simulation experiments under flour flow discharges rates (5, 9, 13 and 17 L min(-1)) and three typical slope gradients (24 degrees, 28 degrees and 32 degrees). The results showed that the rill erosion process could be divided into two stages: a rapid development stage (RDS) and a subsequent slow development stage (SDS). Among that, the rill width, rill depth, cumulative runoff yield and cumulative sediment yield in RDS average accounts for 81 %, 57 %, 29 % and 41 % of the total, respectively, which indicated that the rill depth exhibited significant contributions to spoil heaps rill erosion. The flow regimes in the RDS were turbulent, transitional and laminar flow, whereas in the SDS was transitional flow. The flow type in the RDS was supercritical flow, whereas in the SDS were supercritical flow and subcritical flow. For the whole erosion process (including two stages), the critical shear stress and the critical runoff power were 10.00 Pa and 3.22 N m(-1) s(-1), respectively. Furthermore, runoff power could be considered as the best hydrodynamic parameters to characterize the rill erosion mechanism. These results could be used to control artificial erosion caused by production and construction projects and to provide some key indicators for soil and water loss perdition in Loess Plateau of China.
资助项目	National Natural Science Foundation of China[41671283] ; National Natural Science Foundation of China[41807066] ; State Key Development Program for Basic Research of China[2016YFC0501706-02] ; Award for Excellent Doctoral to work in Shanxi[SXYBKY2019029]
WOS关键词	SOIL-EROSION ; WATER EROSION ; SEDIMENT TRANSPORT ; FLOW ; DETACHMENT ; VELOCITY ; RAINFALL ; HYDRAULICS ; CONSTRUCTION ; ERODIBILITY
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000536900200009
资助机构	National Natural Science Foundation of China ; State Key Development Program for Basic Research of China ; Award for Excellent Doctoral to work in Shanxi
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159552]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Zhaoliang
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, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 3.Henan Univ, Coll Environm & Planning, Kaifeng 475004, Peoples R China 4.Beijing Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China 5.Shanxi Agr Univ, Coll Resources & Environm, Taigu 030801, Shanxi, Peoples R China 6.Pingxiang Univ, Pingxiang 337000, Jiangxi, Peoples R China 7.YRCC, Soil & Water Conservat Control Bur, Jin Shan Meng Adjacent Area, Yulin 719000, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Niu, Yaobin,Gao, Zhaoliang,Li, Yonghong,et al. Characteristics of rill erosion in spoil heaps under simulated inflow: A field runoff plot experiment[J]. SOIL & TILLAGE RESEARCH,2020,202:11.
APA	Niu, Yaobin.,Gao, Zhaoliang.,Li, Yonghong.,Lou, Yongcai.,Zhang, Shuai.,...&Luo, Ke.(2020).Characteristics of rill erosion in spoil heaps under simulated inflow: A field runoff plot experiment.SOIL & TILLAGE RESEARCH,202,11.
MLA	Niu, Yaobin,et al."Characteristics of rill erosion in spoil heaps under simulated inflow: A field runoff plot experiment".SOIL & TILLAGE RESEARCH 202(2020):11.