| Rill development and its change rate: a field experiment under constant rainfall intensity | |
| Kou, Pinglang1,2; Xu, Qiang2; Yunus, Ali P.2; Dong, Xiujun2; Zhong, Yujian2; Chen, Linwan2; Fang, Shanao2; Luo, Xiaobo1; Jin, Zhao3,4 | |
| 通讯作者 | Xu, Qiang(xuqiang_sklgp@163.com) |
| 2021-04-01 | |
| 发表期刊 | CATENA
 |
| ISSN | 0341-8162 |
| 卷号 | 199页码:12 |
| 摘要 | Rill erosion is a widespread form of soil erosion on loess slope surfaces. The rill formation, evolutionary mechanism, and the quantitative expression of rill erosion dynamic changes in a micro-topographic level are currently lacking, primarily owing to lack of finer-scale measurements. This work presented the rill erosion evolutionary process and their dynamic changes at different slope gradients, (12 degrees, 18 degrees) in a millimeter-scale analysis. We achieved it by constructing an artificial excavation in the field and performed a soil pan with dimensions of 8 m in length and 2 m in width, which were subjected to a constant rainfall intensity of 100 mm h(-1). The multiphase micro-geomorphologic changes during each rainfall phase were monitored using high-resolution terrestrial laser scanner (TLS). We noticed that the larger overland flow in the rill corresponded to more pronounced fluctuations in the cross-section lines of the rill bed. Also, with more the number of rills, the more easily the overland flow was dispersed, which required a larger slope gradient to resume the erosion and fill processes. Erosion rate and fill rate were highly correlated in general, and they increased abruptly at 70-90 degrees. Due to the presence of swelling minerals, the loess surface expanded rapidly after encountering water in the early stage of rainfall. Therefore, the amount and rate of erosion on the slopes were underestimated. Understanding the detailed evolution process of rill erosion from a micro-perspective can provide a valuable reference for the development law of the initial stage of slope erosion in the loess region where erosion is extremely serious. |
| 关键词 | Rill erosion Terrestrial laser scanner Concentrated flow Loess slope |
| DOI | 10.1016/j.catena.2020.105112 |
| 关键词[WOS] | LOESS PLATEAU ; EROSION PROCESSES ; INTERRILL EROSION ; GANSU PROVINCE ; SOIL-EROSION ; LANDSLIDES ; SLOPE ; RUNOFF |
| 收录类别 | SCI ; SCI |
| 语种 | 英语 |
| 资助项目 | Major Program of the National Natural Science Foundation of China[41790445] ; National Natural Science Foundation of China[41790444] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40020301] ; Key Program of National Natural Science Foundation of China[41630640] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 项目资助者 | Major Program of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Program of National Natural Science Foundation of China |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| WOS记录号 | WOS:000608022600027 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/15880 |
| 专题 | 生态环境研究室 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Xu, Qiang |
| 作者单位 | 1.Chongqing Univ Posts & Telecommun, Coll Comp Sci & Technol, Chongqing Engn Res Ctr Spatial Big Data Intellige, Chongqing 400065, Peoples R China 2.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kou, Pinglang,Xu, Qiang,Yunus, Ali P.,et al. Rill development and its change rate: a field experiment under constant rainfall intensity[J]. CATENA,2021,199:12. |
| APA | Kou, Pinglang.,Xu, Qiang.,Yunus, Ali P..,Dong, Xiujun.,Zhong, Yujian.,...&Jin, Zhao.(2021).Rill development and its change rate: a field experiment under constant rainfall intensity.CATENA,199,12. |
| MLA | Kou, Pinglang,et al."Rill development and its change rate: a field experiment under constant rainfall intensity".CATENA 199(2021):12. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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