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Rill development and its change rate: a field experiment under constant rainfall intensity

文献类型：期刊论文

作者Kou, Pinglang1,2; Xu, Qiang2; Yunus, Ali P.2; Dong, Xiujun2; Zhong, Yujian2; Chen, Linwan2; Fang, Shanao2; Luo, Xiaobo1; Jin, Zhao3,4
刊名CATENA
出版日期2021-04-01
卷号199页码:12
ISSN号0341-8162
关键词Rill erosion Terrestrial laser scanner Concentrated flow Loess slope
DOI10.1016/j.catena.2020.105112
通讯作者Xu, Qiang(xuqiang_sklgp@163.com)
英文摘要Rill erosion is a widespread form of soil erosion on loess slope surfaces. The rill formation, evolutionary mechanism, and the quantitative expression of rill erosion dynamic changes in a micro-topographic level are currently lacking, primarily owing to lack of finer-scale measurements. This work presented the rill erosion evolutionary process and their dynamic changes at different slope gradients, (12 degrees, 18 degrees) in a millimeter-scale analysis. We achieved it by constructing an artificial excavation in the field and performed a soil pan with dimensions of 8 m in length and 2 m in width, which were subjected to a constant rainfall intensity of 100 mm h(-1). The multiphase micro-geomorphologic changes during each rainfall phase were monitored using high-resolution terrestrial laser scanner (TLS). We noticed that the larger overland flow in the rill corresponded to more pronounced fluctuations in the cross-section lines of the rill bed. Also, with more the number of rills, the more easily the overland flow was dispersed, which required a larger slope gradient to resume the erosion and fill processes. Erosion rate and fill rate were highly correlated in general, and they increased abruptly at 70-90 degrees. Due to the presence of swelling minerals, the loess surface expanded rapidly after encountering water in the early stage of rainfall. Therefore, the amount and rate of erosion on the slopes were underestimated. Understanding the detailed evolution process of rill erosion from a micro-perspective can provide a valuable reference for the development law of the initial stage of slope erosion in the loess region where erosion is extremely serious.
WOS关键词LOESS PLATEAU ; EROSION PROCESSES ; INTERRILL EROSION ; GANSU PROVINCE ; SOIL-EROSION ; LANDSLIDES ; SLOPE ; RUNOFF
资助项目Major Program of the National Natural Science Foundation of China[41790445] ; National Natural Science Foundation of China[41790444] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40020301] ; Key Program of National Natural Science Foundation of China[41630640]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
出版者ELSEVIER
WOS记录号WOS:000608022600027
资助机构Major Program of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Program of National Natural Science Foundation of China
源URL[http://ir.ieecas.cn/handle/361006/15879]  
专题地球环境研究所_生态环境研究室
第四纪科学与全球变化卓越创新中心
通讯作者Xu, Qiang
作者单位1.Chongqing Univ Posts & Telecommun, Coll Comp Sci & Technol, Chongqing Engn Res Ctr Spatial Big Data Intellige, Chongqing 400065, Peoples R China
2.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Kou, Pinglang,Xu, Qiang,Yunus, Ali P.,et al. Rill development and its change rate: a field experiment under constant rainfall intensity[J]. CATENA,2021,199:12.
APA Kou, Pinglang.,Xu, Qiang.,Yunus, Ali P..,Dong, Xiujun.,Zhong, Yujian.,...&Jin, Zhao.(2021).Rill development and its change rate: a field experiment under constant rainfall intensity.CATENA,199,12.
MLA Kou, Pinglang,et al."Rill development and its change rate: a field experiment under constant rainfall intensity".CATENA 199(2021):12.

入库方式： OAI收割

来源：地球环境研究所

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