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Quantifying contributions of slaking and mechanical breakdown of soil aggregates to splash erosion for different soils from the Loess plateau of China
Hai Xiao1,3; Gang Liu1,2; Qiong Zhang1; Zheng Fenli1,2; Xunchang Zhang4; Puling Liu1,2; Jiaqiong Zhang1,2; Feinan Hu1,2; Mohamed A. M. Abd Elbasit5; Liu, G (reprint author), 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2018
Source PublicationSOIL & TILLAGE RESEARCH
ISSN0167-1987
description.correspondentemailgliu@foxmail.com
Volume178Pages:150-158
AbstractThe information of aggregate disintegration mechanisms during splash erosion is scant. This study was conducted to quantify contributions of the mechanisms of aggregate disintegration to splash erosion. Six soils with five soil textures were used. Soil aggregate stability was determined by the Le Bissonnais (LB) method. Deionized water was used to simulate the combined effect of slaking and mechanical disaggregation, while ethanol was used to estimate the sole contribution of the mechanical breakdown. Simulated rainfall with intensity of 60 mm h(-1) was applied at five fall heights (0.5 m, 1 m, 1.5 m, 2 m and 2.5 m) to achieve different levels of rainfall kinetic energy. The results indicated that slaking caused the most severe aggregate breakdown, and followed by mechanical breakdown, while chemical dispersion in slow wetting with deionized water was the weakest breakdown mechanism. The splash erosion rates due to the effects of slaking and mechanical breakdown increased with an increase in rainfall kinetic energy. The contributions of the slaking (mechanical breakdown) to splash erosion decreased (increased) as rainfall kinetic energy increased. The contribution of mechanical breakdown had a power function relation with rainfall kinetic energy, and had the most significant correlation with RSI (relative slaking index)/RMI (relative mechanical breakdown index). A power and a linear function could be used to describe the relationships between the contributions of mechanical breakdown with rainfall kinetic energy and RSI/RMI, respectively, which could be used to estimate the contribution of mechanical breakdown. The results of this research would be helpful to improving the soil erosion prediction models.
KeywordAggregate Disintegration Slaking Mechanical Breakdown Rainfall Kinetic Energy Soil Texture
Subject AreaAgriculture
DOI10.1016/j.still.2017.12.026
Indexed BySCI
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language英语
WOS IDWOS:000426223500017
PublisherELSEVIER SCIENCE BV
Funding OrganizationNatural Science Foundation of China [41761144060] ; Natural Science Foundation of China [41761144060] ; National Key R&D Program of China [2016YFE0202900] ; National Key R&D Program of China [2016YFE0202900] ; International Partnership Program of Chinese Academy of Sciences [161461KYSB20170013] ; International Partnership Program of Chinese Academy of Sciences [161461KYSB20170013] ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2015BAC01B03-03] ; National Key Technology Research and Development Program of the 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] ; Key Laboratory Projects of Natural Science Foundation of Hubei Province of China [2016CFA085] ; Key Laboratory Projects of Natural Science Foundation of Hubei Province of China [2016CFA085] ; open fund of Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education (China Three Gorges University) [2017KDZ10] ; open fund of Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education (China Three Gorges University) [2017KDZ10]
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8264
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorLiu, G (reprint author), 26 Xinong Rd, 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, Peoples R China
2.Chinese Acad Sci, Inst Soil & Water Conservat, Minist Water Resources, Yangling 712100, Peoples R China
3.China Three Gorges Univ, Key Lab Geol Hazards, Three Gorges Reservoir Area, Minist Educ, Yichang 443002, Peoples R China
4.USDA ARS, Grazinglands Res Lab, 7207 W Cheyenne St, El Reno, OK 73036 USA
5.Agr Res Council, Inst Soil Climate & Water, Private Bag X79, ZA-0001 Pretoria, South Africa
Recommended Citation
GB/T 7714
Hai Xiao,Gang Liu,Qiong Zhang,et al. Quantifying contributions of slaking and mechanical breakdown of soil aggregates to splash erosion for different soils from the Loess plateau of China[J]. SOIL & TILLAGE RESEARCH,2018,178:150-158.
APA Hai Xiao.,Gang Liu.,Qiong Zhang.,Zheng Fenli.,Xunchang Zhang.,...&Liu, G .(2018).Quantifying contributions of slaking and mechanical breakdown of soil aggregates to splash erosion for different soils from the Loess plateau of China.SOIL & TILLAGE RESEARCH,178,150-158.
MLA Hai Xiao,et al."Quantifying contributions of slaking and mechanical breakdown of soil aggregates to splash erosion for different soils from the Loess plateau of China".SOIL & TILLAGE RESEARCH 178(2018):150-158.
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