LABORATORY STUDIES ON THE INFLUENCE OF RAINFALL PATTERN ON RILL EROSION AND ITS RUNOFF AND SEDIMENT CHARACTERISTICS

doi:10.1002/ldr.2691

	LABORATORY STUDIES ON THE INFLUENCE OF RAINFALL PATTERN ON RILL EROSION AND ITS RUNOFF AND SEDIMENT CHARACTERISTICS
	He, Ji-jun 1; Sun, Li-ying 2; Gong, Hui-li 1; Cai, Qiang-guo 2
刊名	LAND DEGRADATION & DEVELOPMENT
	2017-07-01
卷号	28 期号:5 页码:1615-1625
关键词	rainfall pattern rill erosion runoff velocity sediment concentration sediment particle size distribution
ISSN号	1085-3278
DOI	10.1002/ldr.2691
通讯作者	He, Ji-jun(hejiun_200018@163.com)
英文摘要	Rill is a major type of erosion on upland slopes. Continuous rainfall is commonly used in laboratory studies on rill erosion despite the fact the rainfall was often discontinuous in the field; this is particularly true in the Chinese Loess Plateau. This study compares rill erosion under continuous and intermittent rainfalls by using laboratory experiments. The experiments include two rainfall-intensity treatments (90 and 120 mm h(-1)) and two rainfall-pattern treatments (continuous and intermittent). The results indicate that rill formation had a significant effect on runoff and sediment concentration. For continuous and intermittent rainfall at the rainfall intensity of 90 mm h(-1), the mean sediment concentrations were 1.91 and 1.73 times after rill initiation than those before rill initiation, respectively, and the rill erosion accounted for 75.5% and 77.7% of runoff duration, respectively. For continuous and intermittent rainfall at the rainfall intensity of 120 mm h(-1), the mean sediment concentrations after rill initiation were 1.38 and 1.32 times that those before rill initiation, respectively, and the rill erosion represented 88.7% and 78.8% of the total runoff duration, respectively. We observed sediment sorting under all treatments; however, the low rainfall intensity boosted but the high rainfall intensity lowered the clay fraction; in contrast, the sorting remained roughly the same between the rainfall-pattern treatments. The runoff velocity also affected the. sediment sorting. Our empirical results indicated the important significance of the rainfall intermittence in predicting rill erosion. Copyright (C) 2017 John Wiley & Sons, Ltd.
资助项目	National Natural Science Foundation of China[41401302] ; National Natural Science Foundation of China[41471229] ; National Natural Science Foundation of China[41271304] ; Key Program of National Natural Science Foundation of China[41130744] ; Natural Science Foundation of the Beijing Municipal Commission of Education[025135303700/048] ; Beijing Youth Elite Project[043135336000/002]
WOS关键词	SOIL-WATER CONTENT ; SEMIARID HILLSLOPE ; STEEP SLOPES ; FLOW ; TRANSPORT ; SIMULATION ; INTENSITY ; VELOCITY ; MODEL ; HYDRAULICS
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	WILEY
WOS记录号	WOS:000407990500012
资助机构	National Natural Science Foundation of China ; Key Program of National Natural Science Foundation of China ; Natural Science Foundation of the Beijing Municipal Commission of Education ; Beijing Youth Elite Project
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/61387]
专题	中国科学院地理科学与资源研究所
通讯作者	He, Ji-jun
作者单位	1.Capital Normal Univ, Key Lab Resources Environm & GIS Beijing, Base State Lab Urban Environm Proc & Digital Mode, 105 West Third Ring Rd North, Beijing 100048, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	He, Ji-jun,Sun, Li-ying,Gong, Hui-li,et al. LABORATORY STUDIES ON THE INFLUENCE OF RAINFALL PATTERN ON RILL EROSION AND ITS RUNOFF AND SEDIMENT CHARACTERISTICS[J]. LAND DEGRADATION & DEVELOPMENT,2017,28(5):1615-1625.
APA	He, Ji-jun,Sun, Li-ying,Gong, Hui-li,&Cai, Qiang-guo.(2017).LABORATORY STUDIES ON THE INFLUENCE OF RAINFALL PATTERN ON RILL EROSION AND ITS RUNOFF AND SEDIMENT CHARACTERISTICS.LAND DEGRADATION & DEVELOPMENT,28(5),1615-1625.
MLA	He, Ji-jun,et al."LABORATORY STUDIES ON THE INFLUENCE OF RAINFALL PATTERN ON RILL EROSION AND ITS RUNOFF AND SEDIMENT CHARACTERISTICS".LAND DEGRADATION & DEVELOPMENT 28.5(2017):1615-1625.