ISWC OpenIR  > 水保所科研产出--SCI  > 2017--SCI
Splash detachment and transport of loess aggregate fragments by raindrop action
Fu, Yu1; Li, Guang-lu1,2; Zheng, Teng-hui1; Li, Bai-qiao1; Zhang, Teng2; Li, GL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China.
SubtypeArticle
2017
Source PublicationCATENA
ISSN0341-8162
description.correspondentemailguangluli@nwsuaf.edu.cn
Volume150Pages:154-160
AbstractSplash erosion, which results from the bombardment of raindrops on soil, is the initial stage of soil erosion by water and is mainly responsible for the detachment and transport of soil aggregates. The objective of this study was to estimate the difference between the breakdown and dispersion of soil aggregates for two typical soils (Lou soil and Drab soil) of the Loess Plateau by raindrop action and to determine the relation between raindrop size and splash distance as well as soil aggregate detachment and transport in the loess area. Simulated tests were performed using a custom-made device to generate raindrops of six different sizes (2.67 mm, 3.05 mm, 3.39 mm, 3.79 mm, 4.05 mm and 5.45 mm) and to measure splash erosion at five distance intervals (0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm and 40-50 cm). The results indicated that the splash erosion was distributed at a splash distance of 0-20 cm for the Lou soil and the Drab soil. Under the same type of raindrop, the splash volume of the Drab soil was higher than that of the Lou soil. For the Lou and Drab soils, the relation between the amount of splash and raindrop size increased linearly (r(2) = 0.985 and 0.860, respectively, p < 0.01), and a highly significant exponential relationship was found between splash distance and raindrop size (r(2) >= 0.967, p < 0.01). The amount of splash detachment increased with increasing raindrop size for the two soil types. The maximum splash erosion occurred when the raindrop diameter was 5.45 mm. Macro-aggregates > 0.25 mm broke apart to form micro-aggregates of < 0.25 mm. Models were developed to predict the amount of splash erosion (M) for a given raindrop size (D) and splash distance (S) as follows: M = 0.741D(4.846)S- 1.820, r(2) = 0.916, p < 0.01 and M = 2.104D4.450S- 2.135, r(2) = 0.904, p < 0.01. Thus, large amounts of micro-aggregate dispersion and breakdown result in soil surface sealing and soil pore clogging.
Subject AreaGeology ; Agriculture ; Water Resources
DOI10.1016/j.catena.2016.11.021
URL查看原文
Indexed BySCI
Publication PlaceAMSTERDAM
Language英语
WOS IDWOS:000392686000018
PublisherELSEVIER SCIENCE BV
Funding OrganizationNational Natural Science Foundation of China [41571262]; Chinese Ministry of Water Resources Science and Technology Promotion program [TG1308] ; National Natural Science Foundation of China [41571262]; Chinese Ministry of Water Resources Science and Technology Promotion program [TG1308]
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8029
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorLi, GL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
2.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Peoples R China
Recommended Citation
GB/T 7714
Fu, Yu,Li, Guang-lu,Zheng, Teng-hui,et al. Splash detachment and transport of loess aggregate fragments by raindrop action[J]. CATENA,2017,150:154-160.
APA Fu, Yu,Li, Guang-lu,Zheng, Teng-hui,Li, Bai-qiao,Zhang, Teng,&Li, GL .(2017).Splash detachment and transport of loess aggregate fragments by raindrop action.CATENA,150,154-160.
MLA Fu, Yu,et al."Splash detachment and transport of loess aggregate fragments by raindrop action".CATENA 150(2017):154-160.
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