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Response of soil detachment rate to the hydraulic parameters of concentrated flow on steep loessial slopes on the Loess Plateau of China
Xiao, Hai1; Liu, Gang1,2; Liu, Puling1,2; Zheng, Fenli1,2; Zhang, Jiaqiong1,2; Hu, Feinan1,2; Liu, G (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi Provinc, Peoples R China.
SubtypeArticle
2017
Source PublicationHYDROLOGICAL PROCESSES
ISSN0885-6087
description.correspondentemailgliu@foxmail.com
Volume31Issue:14Pages:2613-2621
AbstractUsing hydraulic parameters is essential for describing soil detachment and developing physically based erosion prediction models. Many hydraulic parameters have been used, but the one that performs the best for describing soil detachment on steep slopes when the lateral expansion (widening) of rills is not limited has not been identified. An indoor concentrated flow scouring experiment was performed on steep loessial slopes to investigate soil detachment rates for different flow rates and slope gradients. The experiments were conducted on a slope-adjustable plot (5 m length, 1 m width, 0.5 m depth). Sixteen combinations of 4 flow rates (10, 15, 20, and 25 L/min) and 4 slope gradients (17.6%, 26.8%, 36.4%, and 46.6%) were investigated. The individual and combined effects of slope gradient and flow hydraulic parameters on soil detachment rate were analysed. The results indicated that soil detachment rate increased with flow rate and slope gradient. Soil detachment rate varied linearly and exponentially with flow rate and slope gradient, respectively. Multivariate, nonlinear regression analysis indicated that flow depth exerted the greatest influence on the soil detachment rate, followed by unit discharge per unit width, slope gradient, and flow rate in this study. Shear stress and stream power could efficiently describe the soil detachment rate using a power equation. However, the unit stream power and unit energy of the water-carrying section changed linearly with soil detachment rate. Stream power was an optimal hydraulic parameter for describing soil detachment. These findings improve our understanding of concentrated flow erosion on steep loessial slopes.
KeywordConcentrated Flow Hydraulic Parameter Loessial Hillslope Soil Detachment Rate Steep Slope
Subject AreaWater Resources
DOI10.1002/hyp.11210
URL查看原文
Indexed BySCI
Publication PlaceHOBOKEN
Language英语
WOS IDWOS:000405521700009
PublisherWILEY
Funding OrganizationNational Key Technology Research and Development Program of the Ministry of Science and Technology of China [2015BAC01B03-03]; Natural Science Basic Research Plan in Shaanxi Province of China [2016JQ4017]; West Light Foundation of The Chinese Academy of Sciences [2014-91]; Talents Research Start-up Foundation of Shaanxi Province [2013-02100-Z111021512]; Chinese Universities Scientific Fund [2452016102]; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403C2]; Natural Science Foundation of China [41371281] ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2015BAC01B03-03]; Natural Science Basic Research Plan in Shaanxi Province of China [2016JQ4017]; West Light Foundation of The Chinese Academy of Sciences [2014-91]; Talents Research Start-up Foundation of Shaanxi Province [2013-02100-Z111021512]; Chinese Universities Scientific Fund [2452016102]; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403C2]; Natural Science Foundation of China [41371281]
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Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7966
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorLiu, G (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi Provinc, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi Provinc, Peoples R China
2.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
3.Minist Water Resources, Yangling 712100, Peoples R China
Recommended Citation
GB/T 7714
Xiao, Hai,Liu, Gang,Liu, Puling,et al. Response of soil detachment rate to the hydraulic parameters of concentrated flow on steep loessial slopes on the Loess Plateau of China[J]. HYDROLOGICAL PROCESSES,2017,31(14):2613-2621.
APA Xiao, Hai.,Liu, Gang.,Liu, Puling.,Zheng, Fenli.,Zhang, Jiaqiong.,...&Liu, G .(2017).Response of soil detachment rate to the hydraulic parameters of concentrated flow on steep loessial slopes on the Loess Plateau of China.HYDROLOGICAL PROCESSES,31(14),2613-2621.
MLA Xiao, Hai,et al."Response of soil detachment rate to the hydraulic parameters of concentrated flow on steep loessial slopes on the Loess Plateau of China".HYDROLOGICAL PROCESSES 31.14(2017):2613-2621.
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