Impacts of frozen layer and rock fragment on sediment transport capacity on frozen-stony slopes
文献类型：期刊论文
| 作者 | Ban, Yunyun1,2; Lei, Tingwu1 |
| 刊名 | HYDROLOGICAL PROCESSES
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 36期号:6页码:9 |
| 关键词 | frozen-stony slope rock fragment content sediment transport capacity thawed soil depth |
| ISSN号 | 0885-6087 |
| DOI | 10.1002/hyp.14627 |
| 通讯作者 | Ban, Yunyun(banyy@igsnrr.ac.cn) |
| 英文摘要 | Cold areas commonly experienced freeze-thaw cycles and covered with rock fragment. Exploring sediment transport capacity of frozen-stony soil scoured by concentrated meltwater flow is meaningful for soil erosion prediction and modelling in cold regions. This laboratory experiment is conducted to evaluate the contribution of frozen layer and rock fragment to soil erosion, which involves three slope gradients of 5 degrees, 10 degrees, and 15 degrees, three flow rates of 1, 2, and 4 L min(-1), four thawed soil depths of 1, 2, 5, and 10 cm, and four rock fragment contents of 0%, 10%, 20%, and 50% on mass basis with rill length of 12 m. Sediment concentration was determined by the soil in runoff at the outlet. An equation is proposed to estimate sediment transport capacity affected by thawed soil depth and rock fragment content by combining exponential and quadratic functions. Model-fitting results show that sediment transport capacity is negatively correlated with thawed soil depth and exhibits quadratic relationship with rock fragment which peaks at 20% and significantly decreases at rock fragment of 50% on partially thawed slope. Rock fragment takes the leading role of soil erosion on frozen-stony slope instead of thawed soil depth. Results also indicate that embedded rock fragment on totally thawed soil presents more apparently positive impact at low content, but offers more protection at high content on partially frozen layer. This research reveals the soil erosion mechanisms on frozen-stony slope and gives guidance for soil conservation in similar hydrologic conditions and soil type. |
| WOS关键词 | FREEZE-THAW CYCLES ; SOIL-EROSION ; FLOW VELOCITY ; WATER ; COVER ; RAINFALL ; REGION ; EVOLUTION ; STRENGTH ; RUNOFF |
| 资助项目 | National Natural Science Foundation of China[42007060] |
| WOS研究方向 | Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000814040000001 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/180182]  |
| 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.China Agr Univ, Coll Water Resources & Civil Engn, Beijing, Peoples R China 2.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ban, Yunyun,Lei, Tingwu. Impacts of frozen layer and rock fragment on sediment transport capacity on frozen-stony slopes[J]. HYDROLOGICAL PROCESSES,2022,36(6):9. |
| APA | Ban, Yunyun,&Lei, Tingwu.(2022).Impacts of frozen layer and rock fragment on sediment transport capacity on frozen-stony slopes.HYDROLOGICAL PROCESSES,36(6),9. |
| MLA | Ban, Yunyun,et al."Impacts of frozen layer and rock fragment on sediment transport capacity on frozen-stony slopes".HYDROLOGICAL PROCESSES 36.6(2022):9. |
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。