Effects of the extreme rainfall events on particle size selectivity on the simulated Gobi surface using indoor rainfall experiments
文献类型：期刊论文
| 作者 | Sun, Liying1,2; Wang, Chunhui1,2 |
| 刊名 | CATENA
 |
| 出版日期 | 2023 |
| 卷号 | 220页码:12 |
| ISSN号 | 0341-8162 |
| 关键词 | Gobi desert Dust emission Rainfall erosion Particle selectivity Rainfall intensity |
| DOI | 10.1016/j.catena.2022.106716 |
| 通讯作者 | Sun, Liying(sunliying@igsnrr.ac.cn) |
| 英文摘要 | Understanding the particle size selectivity characteristics by rainfalls in the Gobi is of significance to the assessment and projection of the potential sources for the dust emissions. The particle size selectivity characteristics by extreme rainfall events and their correlations with rainfall characteristics and erosion processes were specifically investigated using indoor artificial rainfall experiments. The soils were collected from the Ala Shan Gobi, where was recognized as the major potential sources of dust emissions in Central Asia. The fine particles (<50 mu m) on-slope after rainfall event were significantly (P < 0.05) higher than the original value at rainfall intensity of 15 mm h-1, but they were significantly (P < 0.05) lower than the original value at other rainfall intensities (except 60 mm h-1) with different particle sorting mechanisms. The selectivity of the fine particles (<50 mu m) by rainfall was higher under 20 mm h-1 and 40 mm h-1, as the medium particle size (d50) of the eroded sediment was significantly (P < 0.05) lower than the original value and the fine particles (<50 mu m) enrichment ratio (ERf) of the eroded sediment was dramatically high (4.3 +/- 1.0 at 20 mm h-1 and 3.5 +/- 0.9 at 40 mm h-1). No significant fine particle sorting was showed both on-slope and in the eroded sediment at 60 mm h-1. The correlation analysis suggested that fine particle selectivity in the eroded sediment was more related with rainfall intensity, runoff rate and flow hydrodynamics. Implications of these findings for effects of the extreme rainfalls on the potential dust sources in the Ala Shan Gobi were presented and it could provide the scientific basis for the prediction of potential dust emission in the Ala Shan Gobi areas in the future. |
| WOS关键词 | INTERRILL EROSION ; AGGREGATE STABILITY ; TRANSPORT PROCESSES ; NATURAL RAINFALL ; RAINDROP-IMPACT ; ORGANIC-MATTER ; SEDIMENT ; DETACHMENT ; DESERT ; DISTRIBUTIONS |
| 资助项目 | National Natural Science Foundation of China ; [41930640] ; [41977069] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000880405300004 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/186648]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sun, Liying |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Liying,Wang, Chunhui. Effects of the extreme rainfall events on particle size selectivity on the simulated Gobi surface using indoor rainfall experiments[J]. CATENA,2023,220:12. |
| APA | Sun, Liying,&Wang, Chunhui.(2023).Effects of the extreme rainfall events on particle size selectivity on the simulated Gobi surface using indoor rainfall experiments.CATENA,220,12. |
| MLA | Sun, Liying,et al."Effects of the extreme rainfall events on particle size selectivity on the simulated Gobi surface using indoor rainfall experiments".CATENA 220(2023):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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