Experimental study on soil erosion by concentrated waterflow affected by thawed soil depth
文献类型：期刊论文
| 作者 | Chen, Chao3,4; Lei, Tingwu3,4; Ban, Yunyun2; Gao, Xiaofeng4; Yang, Xiusheng1 |
| 刊名 | CATENA
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 207页码:11 |
| 关键词 | Soil erosion process Thawed soil depth Slope gradient Flow rate Sediment delivery |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2021.105657 |
| 通讯作者 | Lei, Tingwu(leitingwu@cau.edu.cn) |
| 英文摘要 | The rill erosion of a partially thawed soil slope is of great importance for understanding erosion dynamics and supplying datasets to estimate rill erosion model parameters. This study aimed to investigate the effects of thawed soil depth on rill erosion and to quantify the functional relationship between rill length and erosion. A series of laboratory experiments were conducted to measure sediment delivery under four slope gradients of 5 degrees, 10 degrees, 15 degrees, and 20 degrees, three flow rates of 1, 2, and 4 L/min, and three thawed depths of 1, 2, and 5 cm at nine slope lengths of 0.5, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, and 8.0 m. Each individual experimental run harvested four runoff samples to measure sediment concentration. A total of 3,888 data points were produced. The experimental data showed that sediment concentrations along the rill can be well fitted with piecewise functions of linear and exponential sections. The sediment concentrations on the slopes of shallow-thawed depths of 1 and 2 cm initially increased linearly before exponentially increasing with rill length. Under condition of 5 cm thawed depth, the sediments exponentially increased with slope length. The lack of sediment supply over partially thawed soil slope determined the linear increase in sediment at the initial slope part. When water flow traveled a certain slope length to pick up sufficient sediments, the sediment concentration started to increase exponentially. The sediment concentration increased with slope gradient and flow rate. A longer slope was needed to achieve a higher maximum sediment concentration on a shallower thawed depth, a gentler soil slope, and a higher flow rate. The experimental datasets and their functional relationship can supply the basis for estimating the model parameters of rill erosion, such as soil detachment rate and soil erodibility, on partially thawed frozen-soil slope. |
| WOS关键词 | FREEZE-THAW ; FLOW VELOCITY ; BLACK SOIL ; AGGREGATE STABILITY ; RUNOFF ; FROZEN ; RILL ; MODEL ; SIMULATION ; STRENGTH |
| 资助项目 | National Natural Science Foundation of China[41230746] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000703268900075 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/166036]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lei, Tingwu |
| 作者单位 | 1.Univ Connecticut, Dept Nat Resources & Environm, Storrs, CT 06269 USA 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Chao,Lei, Tingwu,Ban, Yunyun,et al. Experimental study on soil erosion by concentrated waterflow affected by thawed soil depth[J]. CATENA,2021,207:11. |
| APA | Chen, Chao,Lei, Tingwu,Ban, Yunyun,Gao, Xiaofeng,&Yang, Xiusheng.(2021).Experimental study on soil erosion by concentrated waterflow affected by thawed soil depth.CATENA,207,11. |
| MLA | Chen, Chao,et al."Experimental study on soil erosion by concentrated waterflow affected by thawed soil depth".CATENA 207(2021):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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