Effects of Simulated Gravel on Hydraulic Characteristics of Overland Flow Under Varying Flow Discharges, Slope Gradients and Gravel Coverage Degrees

doi:10.1038/s41598-019-56223-2

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	Effects of Simulated Gravel on Hydraulic Characteristics of Overland Flow Under Varying Flow Discharges, Slope Gradients and Gravel Coverage Degrees
	Liu, Xiaona ; Fan, Dengxing ; Yu, Xinxiao ; Liu, Ziqiang 1; Sun, Jiamei 3
刊名	SCIENTIFIC REPORTS
	2019
卷号	9
ISSN号	2045-2322
DOI	10.1038/s41598-019-56223-2
文献子类	Article
英文摘要	To quantify the hydraulic characteristics of overland flow on gravel-covered slopes, eight flow discharges (Q) (8.44-122 L/min), five slope gradients (J) (2 degrees-10 degrees) and four gravel coverage degrees (Cr) (0-30%) were examined via a laboratory flume. The results showed that (1) gravel changed flow regime. Gravel increased the Reynolds number (Re) by 2.94-33.03%. Re were less affected by J and positively correlated with Cr and Q. Gravel decreased the Froude number (Fr) by 6.83-77.31%. Fr was positively correlated with Q and J and negatively correlated with Cr. (2) Gravel delayed the flow velocity (U) and increased the flow depth (h) and flow resistance (f). Gravel reduced U by 1.20-58.95%. U was positively correlated with Q and J and negatively correlated with Cr. Gravel increased h by 0.12-2.41 times. h was positively correlated with Q and Cr and negatively correlated with J. Gravel increased f by 0.15-18.42 times. f were less affected by J, positively correlated with Cr and negatively correlated with Q. (3) The relationships between hydraulic parameters and Q, J and Cr identified good power functions. Hydraulic parameters were mainly affected by Cr. These results can guide the ecological construction of soil and water conservation.
学科主题	Multidisciplinary Sciences
出版地	LONDON
WOS关键词	ROCK FRAGMENT COVER ; SEMIARID LOESS REGION ; SOIL-EROSION ; RAINFALL INTENSITY ; ROUGHNESS COEFFICIENTS ; SEDIMENT TRANSPORT ; SOLUTE TRANSPORT ; INTERRILL RUNOFF ; RILL HYDRAULICS ; SHEAR-STRESS
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000508919400001
资助机构	Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [2015ZCQ-SB-01, 2019ZY36] ; National Natural Science Foundation, P.R. ChinaNational Natural Science Foundation of China (NSFC) [41501292] ; National Key Research and Development Program Project Desertification Land Control and Sand Industry Technology Development and Demonstration in Bashang Plateau and Northern North China Mountains [2016YFC0500802] ; Beijing Municipal Education CommissionBeijing Municipal Commission of Education [PXM2018_014207_000024]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/19719]
专题	植被与环境变化国家重点实验室
作者单位	1.Beijing Forestry Univ, Key Lab Soil & Water Conservat & Desertificat Com, State Forestry Adm, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 3.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaona,Fan, Dengxing,Yu, Xinxiao,et al. Effects of Simulated Gravel on Hydraulic Characteristics of Overland Flow Under Varying Flow Discharges, Slope Gradients and Gravel Coverage Degrees[J]. SCIENTIFIC REPORTS,2019,9.
APA	Liu, Xiaona,Fan, Dengxing,Yu, Xinxiao,Liu, Ziqiang,&Sun, Jiamei.(2019).Effects of Simulated Gravel on Hydraulic Characteristics of Overland Flow Under Varying Flow Discharges, Slope Gradients and Gravel Coverage Degrees.SCIENTIFIC REPORTS,9.
MLA	Liu, Xiaona,et al."Effects of Simulated Gravel on Hydraulic Characteristics of Overland Flow Under Varying Flow Discharges, Slope Gradients and Gravel Coverage Degrees".SCIENTIFIC REPORTS 9(2019).