Micro-characteristics of soil aggregate breakdown under raindrop action
Li, GL; Fu, Y; Li, BQ; Zheng, TH; Wu, FQ; Peng, GY; Xiao, TQ
2018
发表期刊CATENA
ISSN0341-8162
卷号162页码:354-359
文章类型期刊论文
摘要Raindrop splash is considered to be the first step in soil erosion, and it is also a contribution to such erosion. Aggregate breakdown due to raindrop splash causes crusting and soil erosion. In this study, the micro-characteristics of soil aggregate breakdown under the action of three sizes of raindrops were examined using synchrotron-based X-ray micro-computed tomography(SR-mu CT). The results showed that soil aggregate breakdown was related to the size of raindrops, was mainly caused by large raindrops during a rainfall event, and formed an enrichment zone, transition zone, and dense airtight zone of aggregates in the surface soil. The shape index and the amount of aggregate in the splashed soil was higher than in the un-splashed soil, especially for micro aggregate fragments (< 25 mu m). We confirm that the existence of large amounts of micro-aggregate fragments surrounding large aggregates in a rainfall event is a principle factor in the formation of soil surface seals and the clogging of pores.
关键词Particle-size Splash Erosion Subtropical China Interrill Erosion Seal Development Slope Gradient Loess Plateau Stability Rainfall Impact
DOI10.1016/j.catena.2017.10.027
收录类别SCI
语种英语
WOS记录号WOS:000423004800033
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29070
专题中科院上海应用物理研究所2011-2018年
作者单位1.Li, GL
2.Fu, Y
3.Li, BQ
4.Zheng, TH
5.Wu, FQ
6.Peng, GY
7.Xiao, TQ
推荐引用方式
GB/T 7714
Li, GL,Fu, Y,Li, BQ,et al. Micro-characteristics of soil aggregate breakdown under raindrop action[J]. CATENA,2018,162:354-359.
APA Li, GL.,Fu, Y.,Li, BQ.,Zheng, TH.,Wu, FQ.,...&Xiao, TQ.(2018).Micro-characteristics of soil aggregate breakdown under raindrop action.CATENA,162,354-359.
MLA Li, GL,et al."Micro-characteristics of soil aggregate breakdown under raindrop action".CATENA 162(2018):354-359.
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