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A comparative experimental study of rill erosion on loess soil and clay loam soil based on a digital close-range photogrammetry technology

文献类型：期刊论文

作者Jiang, Yanmin1,2,5; Shi, Haijing1,2,5; Wen, Zhongming4; Guo, Minghang5; Zhao, Jun5; Cao, Xiaoping5; Shui, Junfeng5; Paull, David3
刊名GEOMORPHOLOGY
出版日期2022-12-15
卷号419页码:15
ISSN号0169-555X
关键词Digital close range photogrammetry technology Rill network Flow velocity Hydrodynamic characteristics
DOI10.1016/j.geomorph.2022.108487
通讯作者Shi, Haijing(shihaijingcn@nwafu.edu.cn)
英文摘要Accurately describing rill development is important for building physical process models of soil erosion. The objectives of this study were to investigate the evolution processes of rill erosion morphology, their impacts on runoff and sediment yield, and the relationship between flow hydraulic characteristics and rill erosion dynamic mechanisms on slopes of two soil types, namely, clay loam soil (CLS) and loess soil (LS), under two successive rainfall events at a rainfall intensity of 120 mm h-1. We used digital close range photogrammetry technology to obtain overhead images of two experimental soil bins (5 m long, 1 m wide and 0.5 m deep with a slope gradient of 20 degrees) at 5-minute time intervals to monitor the dynamic processes of rill erosion. The results showed that rill erosion processes exhibited important impacts on sediment and runoff and its hydrodynamic characteristics. Compared with LS, runoff formed and rills developed earlier in the CLS slope. Soil with high clay content was more prone to form rills, but less susceptible to severe soil erosion than LS. Once rills began to develop in LS, soil loss increased and the morphology of rills changed rapidly, as did runoff rate. The flow velocity for the two soils decreased gradually with time and increased along the flow direction. The trend of Froude number (Fr) decreased with time, whereas the Darcy-Weisbach resistance coefficient (f) exhibited an opposite trend. The Reynolds number (Re) of LS increased first and then decreased, while Re of CLS decreased gradually with time. Sediment yield and runoff were positively correlated with f, but significantly negatively correlated with Fr. Moreover, Re was significantly negatively correlated with sediment yield, but not with runoff. These results are of great importance for soil loss prediction.
WOS关键词ROCK FRAGMENT CONTENT ; RAINFALL INTENSITY ; CONCENTRATED FLOW ; INTERRILL EROSION ; SLOPE ; PRODUCTIVITY ; PLATEAU ; RUNOFF ; IMPACT ; REGION
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences (Pan-Third Pole Environment Study for a Green Silk Road)[XDA20040202] ; National Natural Science Foundation of China[41977077] ; National Natural Science Foundation of China[41571269] ; National R & D Infrastructure and Facility Development Program of China[2005DKA32300]
WOS研究方向Physical Geography ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000891794100004
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences (Pan-Third Pole Environment Study for a Green Silk Road) ; National Natural Science Foundation of China ; National R & D Infrastructure and Facility Development Program of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/188047]  
专题中国科学院地理科学与资源研究所
通讯作者Shi, Haijing
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ New South Wales Canberra, Sch Sci, POB 7916, Canberra, ACT 2610, Australia
4.Northwest A&F Univ, Coll Grassland Agr, Yangling 712100, Shaanxi, Peoples R China
5.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Jiang, Yanmin,Shi, Haijing,Wen, Zhongming,et al. A comparative experimental study of rill erosion on loess soil and clay loam soil based on a digital close-range photogrammetry technology[J]. GEOMORPHOLOGY,2022,419:15.
APA Jiang, Yanmin.,Shi, Haijing.,Wen, Zhongming.,Guo, Minghang.,Zhao, Jun.,...&Paull, David.(2022).A comparative experimental study of rill erosion on loess soil and clay loam soil based on a digital close-range photogrammetry technology.GEOMORPHOLOGY,419,15.
MLA Jiang, Yanmin,et al."A comparative experimental study of rill erosion on loess soil and clay loam soil based on a digital close-range photogrammetry technology".GEOMORPHOLOGY 419(2022):15.

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来源：地理科学与资源研究所

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