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Understanding erosion processes using rare earth element tracers in a preformed interrill-rill system
Xun-chang (John) Zhang2; Gang Liu1; Fenli Zheng1; Liu, G (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2018
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
description.correspondentemailgliu@foxmail.com
Volume625Pages:920-927
AbstractTracking sediment source and movement is essential to fully understanding soil erosion processes. The objectives of this study were to identify dominant erosion process and to characterize the effects of upslope interrill erosion on downslope interrill and rill erosion in a preformed interrill-rill system. A coarse textured soil with 2% clay and 20% silt was packed into a physical model of a scaled small watershed, which was divided into eight topographic units and was tagged with eight rare earth element (REE) oxides. Three 30-min rains were made at the sequential intensities of 60, 90, and 120 ram h(-1), and runoff and sediment were collected every 2 min at the outlet. REE concentration in sediment was measured and used to estimate source contributions after fine-enrichment correction. Results showed that interrill erosion rate and sediment concentration increased with downslope distance, indicating that sediment transport might have controlled interrill erosion rates. In contrast, rill erosion rate was limited by rill detachment and development process. Rill erosion contributed most soil loss; however, the proportion decreased from 78 to 61% as rainfall intensity increased and rill network matured over three rains. Interrill erosion was more sensitive than rill erosion to rainfall intensity increases. The former was mostly affected by rainfall intensity in this experimental setup, while the latter was controlled by flow discharge, gradient, and rill evolution stage. The greatest sediment concentration and delivery rate occurred in the stage of the fastest rill development. The increased sediment delivery from interrill areas appeared to suppress rill detachment by concentrated flow. This study enhanced our understanding of interrill and rill erosion processes and provided the scientific insights for improving soil erosion models. (C) 2018 Elsevier B.V. All rights reserved.
KeywordSediment Tracer Rare Earth Element Spatial Erosion Distribution Interrill Erosion Rill Erosion
Subject AreaEnvironmental Sciences & Ecology
DOI10.1016/j.scitotenv.2017.12.345
Indexed BySCI
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language英语
WOS IDWOS:000426356600094
PublisherELSEVIER SCIENCE BV
Funding OrganizationNational Key Research and Development Program of China [2016YFE0202900] ; National Key Research and Development Program of China [2016YFE0202900] ; Natural Science Foundation of China [41761144060] ; Natural Science Foundation of China [41761144060] ; Chinese Academy of Sciences [161461KYSB20170013] ; Chinese Academy of Sciences [161461KYSB20170013] ; Ministry of Science and Technology of China [2015BAC01B03-03] ; Ministry of Science and Technology of China [2015BAC01B03-03] ; Innovative Talents Promotion Plan in Shaanxi Province [2017KJXX-83] ; Innovative Talents Promotion Plan in Shaanxi Province [2017KJXX-83] ; West Light Foundation of the Chinese Academy of Sciences [2014-91] ; West Light Foundation of the Chinese Academy of Sciences [2014-91] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C2] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C2]
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8249
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorLiu, G (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
2.ARS, USDA, Grazinglands Res Lab, El Reno, OK 73036 USA
Recommended Citation
GB/T 7714
Xun-chang ,Gang Liu,Fenli Zheng,et al. Understanding erosion processes using rare earth element tracers in a preformed interrill-rill system[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,625:920-927.
APA Xun-chang ,Gang Liu,Fenli Zheng,&Liu, G .(2018).Understanding erosion processes using rare earth element tracers in a preformed interrill-rill system.SCIENCE OF THE TOTAL ENVIRONMENT,625,920-927.
MLA Xun-chang ,et al."Understanding erosion processes using rare earth element tracers in a preformed interrill-rill system".SCIENCE OF THE TOTAL ENVIRONMENT 625(2018):920-927.
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