Experimental research on sediment transport processes affected by frozen layer and stone content
文献类型：期刊论文
| 作者 | Ban, Yunyun1,2; Lei, Tingwu2 |
| 刊名 | CATENA
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 217页码:8 |
| ISSN号 | 0341-8162 |
| 关键词 | Rill erosion process Sediment concentration Frozen-stony slope Thawed soil depth Rock fragment content |
| DOI | 10.1016/j.catena.2022.106519 |
| 通讯作者 | Ban, Yunyun(banyy@igsnrr.ac.cn) |
| 英文摘要 | Rill erosion on frozen-stony slope in high-altitude or high-latitude areas commonly undergo freeze-thaw cycle, which is significantly influenced by partially thawed soil with rock fragment. This research aims to investigate the influences of thawed soil depth (TSD) and rock fragment content (RFC) on rill erosion and quantifying the mathematical relationships among them. The laboratory experiment is conducted to evaluate the influences of TSD (1, 2, 5, and 10 cm) and RFC (0%, 10%, 20%, and 50%) on sediment delivery processes by concentrated meltwater flow under three slope gradients of 5 degrees, 10 degrees, and 15 degrees, and three flow rates of 1, 2, and 4 L min-1 at nine rill lengths from 0.5 m to 8.0 m. Five runoff samples are obtained from each experiment run and used to calculate sediment concentration (SC). The SC increases linearly and then exponentially with rill length to approximate the extremum and fits well with piecewise functions. Restrictive effect of TSD and RFC on sediment supply is evident during linear stage induced by shallow TSD, which keeps a long distance under shallow TSD and low RFC to collect sufficient sediment for exponential period. However, TSD and RFC impacts become apparent during the exponential period and lead to higher sediment yield with RFC of 10% and 20% than that on totally thawed soil without rock fragment. In this research, the positive effect on sediment yield increases with RFC increases from 10% to 20%, which may need to be eliminated for efficiency in erosion control. In contrast to low RFC, the protection impact of rock fragment always exerts with RFC of 50%. The experimental data and the functional relationship can provide the basic knowledge for evaluating the model parameters such as soil detachment rate and erodibility of rill erosion on frozen-stony slope. |
| WOS关键词 | INTERRILL SOIL-EROSION ; ROCK FRAGMENT COVER ; FLOW VELOCITY ; FREEZE-THAW ; SOLUTE TRANSPORT ; WATER EROSION ; RILL FLOW ; SLOPE ; DETACHMENT ; REGION |
| 资助项目 | National Natural Science Foundation of China[42007060] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000878850900004 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/186761]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Ban, Yunyun |
| 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.China Agr Univ, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ban, Yunyun,Lei, Tingwu. Experimental research on sediment transport processes affected by frozen layer and stone content[J]. CATENA,2022,217:8. |
| APA | Ban, Yunyun,&Lei, Tingwu.(2022).Experimental research on sediment transport processes affected by frozen layer and stone content.CATENA,217,8. |
| MLA | Ban, Yunyun,et al."Experimental research on sediment transport processes affected by frozen layer and stone content".CATENA 217(2022):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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