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Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations
Han, Jianqiao1,2; Li, Binbin3; Lan, Guohua1; Dong, Yunyun1; Ge, Wenyan1,2; Wang, Fei1,2
2021-12-01
Source PublicationCATENA
ISSN0341-8162
Volume207Pages:8
Corresponding AuthorHan, Jianqiao(hjq13@163.com)
AbstractElucidating the mechanical mechanisms of linear erosion can contribute to the understanding of soil erosion and its prevention. However, few studies have investigated the development of sediment yield and the mechanical understanding of linear erosion. Experiments, four flow discharge rates and three slope gradients, were conducted for a mechanistic understanding of linear erosion. The conclusions are as follows: (1) The forces that detach soil can be divided into dynamic force (DF) and resistance force (RF) by vector decomposition and synthesis methods. The difference between DF and RF is defined as the effective force (EF), which represents the comprehensive mechanical effect of soil erosion. (2) DF and RF tend to be balanced during linear erosion. EF significantly decreased (p < 0.05), DF decreased, and RF increased. (3) The erosion rate (E-r) decreases noticeably with decreasing EF (p < 0.05), from 3.99 kg/min to 2.99 kg/min when the slope is 15. and the discharge is 25 L/min. (4) The tendency for mechanical balance is attributed to the interaction among the flow dynamics, resistance, and morphology of linear erosion. The drop-pits and microgeomorphology developed in the linear erosion increased the water flow resistance and decreased the flow dynamics. This mechanical tendency provides a theoretical basis for linear erosion prevention. Our results can help improve the understanding of soil erosion mechanisms and management of water and soil resources.
KeywordLinear erosion Erosion processes Flow hydrodynamics Mechanical mechanisms Sloped land
DOI10.1016/j.catena.2021.105708
WOS KeywordSOIL DETACHMENT RATE ; RILL EROSION ; SEDIMENT CONCENTRATION ; RAINFALL INTENSITY ; RAINDROP-IMPACT ; RIVER-BASIN ; RUNOFF ; SLOPE ; HYDRAULICS ; EVOLUTION
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41807067] ; National Natural Science Foundation of China[41771558] ; National Natural Science Foundation of China[41907061] ; Water and Soil Conservancy Science Plan in Shaanxi Province of China[2017sbkj-01] ; Youth Talent Lift Project of China Association for Science and Technology[2019-2021QNRC001]
Funding OrganizationNational Natural Science Foundation of China ; Water and Soil Conservancy Science Plan in Shaanxi Province of China ; Youth Talent Lift Project of China Association for Science and Technology
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000703268900121
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/165785
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHan, Jianqiao
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, 3 Taicheng Rd, Yangling, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China
3.Minist Water Resources, Monitoring Ctr Soil & Water Conservat, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Han, Jianqiao,Li, Binbin,Lan, Guohua,et al. Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations[J]. CATENA,2021,207:8.
APA Han, Jianqiao,Li, Binbin,Lan, Guohua,Dong, Yunyun,Ge, Wenyan,&Wang, Fei.(2021).Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations.CATENA,207,8.
MLA Han, Jianqiao,et al."Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations".CATENA 207(2021):8.
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