Experimental study of shallow mass movements on gully slopes and associated sediment under rainfall on the Chinese loess plateau

doi:10.1016/j.geomorph.2019.106919

	Experimental study of shallow mass movements on gully slopes and associated sediment under rainfall on the Chinese loess plateau
	Guo, Wenzhao 1,2; Xu, Xiangzhou 3; Wang, Wenlong 1,2; Zhu, Tongxin 4; Liu, Yakun 3
刊名	GEOMORPHOLOGY
	2020-02-01
卷号	350 页码:9
关键词	Mass movement Soil erosion Landslide Gully slope Sediment yield Chinese Loess Plateau
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2019.106919
通讯作者	Wang, Wenlong(nwafu_wwl@163.com)
英文摘要	Mass movements on gully slopes are the main contributors to gully-bank expansion and are the major source of sediment delivered to rivers; however, they are often overlooked because they are either too small or too time-consuming to measure in the field. To resolve this challenge, a novel topography meter was used to observe shallow mass movements on the gully slopes of the Loess Plateau under simulated rainfall. The experiment showed that the cumulative shallow mass movement volume logarithmically increased with the rainfall amount. The critical rainfall for shallow mass movement occurrence was about 28 mm at a rainfall intensity of 50 mm h(-1). The results also show that soil water content was a key element controlling the occurrence of the shallow mass movements, and the minimal soil water content for permitting shallow mass movements was about 23.1-25.6% for 10-20 cm deep soil. Shallow mass movement on gully slopes has a significant influence on sediment yield. The sediment concentration and sediment transport rate during mass movement failure were on average 3.6 times and 4.0 times higher than that during pre-failure events, respectively. Our results have important implications for understanding the connectivity of sediment discharge and mass movements on gully slopes in hilly and gully watersheds. (C) 2019 Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[51879032] ; National Natural Science Foundation of China[41907057] ; National Natural Science Foundation of China[41571275] ; National Key RD Project[2016YFC0402504] ; Western Light Foundation of the Chinese Academy of Sciences[XAB2O18BO7] ; Fundamental Research Funds for the Central Universities[2452018046]
WOS关键词	WAIPAOA CATCHMENT ; GRAVITY EROSION ; LANDSLIDE ; FREQUENCY ; SOIL ; VEGETATION ; INITIATION ; MAGNITUDE ; RESERVOIR ; FAILURE
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000532088300023
资助机构	National Natural Science Foundation of China ; National Key RD Project ; Western Light Foundation of the Chinese Academy of Sciences ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159656]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Wenlong
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Water & Soil Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Dalian Univ Technol, Sch Hydraul Engn, Dalian 116024, Peoples R China 4.Univ Minnesota Duluth, Dept Geog Urban Environm & Sustainabil Studies, Duluth, MN 55812 USA
推荐引用方式 GB/T 7714	Guo, Wenzhao,Xu, Xiangzhou,Wang, Wenlong,et al. Experimental study of shallow mass movements on gully slopes and associated sediment under rainfall on the Chinese loess plateau[J]. GEOMORPHOLOGY,2020,350:9.
APA	Guo, Wenzhao,Xu, Xiangzhou,Wang, Wenlong,Zhu, Tongxin,&Liu, Yakun.(2020).Experimental study of shallow mass movements on gully slopes and associated sediment under rainfall on the Chinese loess plateau.GEOMORPHOLOGY,350,9.
MLA	Guo, Wenzhao,et al."Experimental study of shallow mass movements on gully slopes and associated sediment under rainfall on the Chinese loess plateau".GEOMORPHOLOGY 350(2020):9.