Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations
文献类型：期刊论文
| 作者 | Han, Jianqiao1,3; Li, Binbin2; Lan, Guohua1; Dong, Yunyun1; Ge, Wenyan1,3; Wang, Fei1,3 |
| 刊名 | CATENA
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 207页码:8 |
| 关键词 | Linear erosion Erosion processes Flow hydrodynamics Mechanical mechanisms Sloped land |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2021.105708 |
| 通讯作者 | Han, Jianqiao(hjq13@163.com) |
| 英文摘要 | Elucidating the mechanical mechanisms of linear erosion can contribute to the understanding of soil erosion and its prevention. However, few studies have investigated the development of sediment yield and the mechanical understanding of linear erosion. Experiments, four flow discharge rates and three slope gradients, were conducted for a mechanistic understanding of linear erosion. The conclusions are as follows: (1) The forces that detach soil can be divided into dynamic force (DF) and resistance force (RF) by vector decomposition and synthesis methods. The difference between DF and RF is defined as the effective force (EF), which represents the comprehensive mechanical effect of soil erosion. (2) DF and RF tend to be balanced during linear erosion. EF significantly decreased (p < 0.05), DF decreased, and RF increased. (3) The erosion rate (E-r) decreases noticeably with decreasing EF (p < 0.05), from 3.99 kg/min to 2.99 kg/min when the slope is 15. and the discharge is 25 L/min. (4) The tendency for mechanical balance is attributed to the interaction among the flow dynamics, resistance, and morphology of linear erosion. The drop-pits and microgeomorphology developed in the linear erosion increased the water flow resistance and decreased the flow dynamics. This mechanical tendency provides a theoretical basis for linear erosion prevention. Our results can help improve the understanding of soil erosion mechanisms and management of water and soil resources. |
| WOS关键词 | SOIL DETACHMENT RATE ; RILL EROSION ; SEDIMENT CONCENTRATION ; RAINFALL INTENSITY ; RAINDROP-IMPACT ; RIVER-BASIN ; RUNOFF ; SLOPE ; HYDRAULICS ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[41807067] ; National Natural Science Foundation of China[41771558] ; National Natural Science Foundation of China[41907061] ; Water and Soil Conservancy Science Plan in Shaanxi Province of China[2017sbkj-01] ; Youth Talent Lift Project of China Association for Science and Technology[2019-2021QNRC001] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000703268900121 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Water and Soil Conservancy Science Plan in Shaanxi Province of China ; Youth Talent Lift Project of China Association for Science and Technology |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/165784]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Han, Jianqiao |
| 作者单位 | 1.Northwest A&F Univ, Inst Soil & Water Conservat, 3 Taicheng Rd, Yangling, Shaanxi, Peoples R China 2.Minist Water Resources, Monitoring Ctr Soil & Water Conservat, Beijing, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Jianqiao,Li, Binbin,Lan, Guohua,et al. Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations[J]. CATENA,2021,207:8. |
| APA | Han, Jianqiao,Li, Binbin,Lan, Guohua,Dong, Yunyun,Ge, Wenyan,&Wang, Fei.(2021).Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations.CATENA,207,8. |
| MLA | Han, Jianqiao,et al."Mechanistic understanding of linear erosion under concentrated flow based on laboratory simulations".CATENA 207(2021):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。