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A laboratory study on rill network development and morphological characteristics on loessial hillslope
Chao Qin1,2; Fenli Zheng1,3; Ximeng Xu1,2; Hongyan Wu1; Haiou Shen5; Zheng, FL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Zheng, FL (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.; Zheng, FL (reprint author), MWR, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2018
Source PublicationJOURNAL OF SOILS AND SEDIMENTS
ISSN1439-0108
description.correspondentemailflzh@ms.iswc.ac.cn
Volume18Issue:4Pages:1679-1690
AbstractRills are basic pathways for runoff, sediment, and pollutant transport at hillslopes within agricultural watershed. The objectives of this study were to investigate the development processes of rill network and morphological characteristics and to examine their affecting factors. A soil box (10 m long, 1.5 m wide, and 0.5 m deep) was subjected to four successive simulated rains under rainfall intensity of 90 mm h(-1) with slope gradients of 15A degrees and 25A degrees. Digital elevation models (5 mm resolution) were created from the terrestrial laser scanning measurements. Total soil loss was 46.3 and 61.0 kg m(-2) at the 15A degrees and 25A degrees slope gradients, and rill erosion occupied over 75% of the total soil loss. Soil loss and rill erosion were expressed as power equations to the product of slope gradient and accumulated rainfall. Rill networks evolved in a converging way and reached maturity in the fourth rain. Main rill length and rill width, depth, and degree of contour line departure increased with increased rains, while rill width/depth ratio showed the opposite trend. Secondary rill length and rill density increased in the first two rains, and then both decreased in the latter two rains. Scour effect of lateral interfluve flow and meander cutoffs of rill flow were two sub-processes of rill piracy. Rill length and density decreased due to rill piracy specific in merging of secondary rills into main rills. Plow pan and secondary headcuts played key roles in main rill bed incision and sidewall expansion processes, while both had little impact on secondary rills. Results of this study can improve the understanding of how plow pan, rill piracy, and secondary headcut affect rill network and morphologies and provide fundamental knowledge for designing rill prevention practices.
KeywordPlow Pan Rill Morphology Secondary Headcut Soil Erosion Tls
Subject AreaEnvironmental Sciences & Ecology ; Agriculture
DOI10.1007/s11368-017-1878-y
Indexed BySCI
Publication PlaceTIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
Language英语
WOS IDWOS:000428619800044
PublisherSPRINGER HEIDELBERG
Funding OrganizationNational Natural Science Foundation of China [41271299, 4171101192] ; National Natural Science Foundation of China [41271299, 4171101192] ; MWR Key Laboratory of Soil and Water Loss Process and Control in the Loess Plateau [2017001] ; MWR Key Laboratory of Soil and Water Loss Process and Control in the Loess Plateau [2017001] ; 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] ; China Scholarship Council ; China Scholarship Council
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8275
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorZheng, FL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Zheng, FL (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.; Zheng, FL (reprint author), MWR, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Univ Mississippi, Natl Ctr Computat Hydrosci & Engn, Oxford, MS 38677 USA
3.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
4.MWR, Yangling 712100, Shaanxi, Peoples R China
5.Jilin Agr Univ, Collage Resources & Environm, Changchun 130118, Jilin, Peoples R China
Recommended Citation
GB/T 7714
Chao Qin,Fenli Zheng,Ximeng Xu,et al. A laboratory study on rill network development and morphological characteristics on loessial hillslope[J]. JOURNAL OF SOILS AND SEDIMENTS,2018,18(4):1679-1690.
APA Chao Qin.,Fenli Zheng.,Ximeng Xu.,Hongyan Wu.,Haiou Shen.,...&Zheng, FL .(2018).A laboratory study on rill network development and morphological characteristics on loessial hillslope.JOURNAL OF SOILS AND SEDIMENTS,18(4),1679-1690.
MLA Chao Qin,et al."A laboratory study on rill network development and morphological characteristics on loessial hillslope".JOURNAL OF SOILS AND SEDIMENTS 18.4(2018):1679-1690.
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