Modelling the process of soil detachment by rill flow on steep loessial hillslopes
文献类型：期刊论文
| 作者 | Shen, Nan1; Wang, Zhanli1,2; Zhang, Qingwei1; Wu, Bing3; Liu, June4 |
| 刊名 | EARTH SURFACE PROCESSES AND LANDFORMS
 |
| 出版日期 | 2020-01-16 |
| 页码 | 8 |
| ISSN号 | 0197-9337 |
| 关键词 | rill erosion soil detachment rate transport capacity deficit modelling contribution rate |
| DOI | 10.1002/esp.4801 |
| 通讯作者 | Wang, Zhanli(zwang@nwsuaf.edu.cn) |
| 英文摘要 | Soil detachment by rill flow is a key process of rill erosion, modelling this process can help in understanding rill erosion mechanisms. However, many soil detachment models are established on conceptual assumptions rather than experimental data. The objectives of this study were to establish a model of soil detachment by rill flow based on flume experimental data and to quantitatively verify the model. We simulated the process of soil detachment by rill flow in flume experiments with a soil-feeding hopper using loessial soil on steep slopes. Seven flow discharges, six slopes and five sediment loads were combined. Soil detachment capacity, sediment transport capacity, and soil detachment rate by rill flow under different sediment loads were measured. The process of soil detachment by rill flow can be modelled by a dual power function based on soil detachment capacity and transport capacity deficit as variables. The established model exhibited high credibility (NSE=0.97; R-2=0.97). The contributions of soil detachment capacity and transport capacity deficit to soil detachment rate by rill flow reached 60% and 36%, respectively. Soil detachment capacity exerted more influence on soil detachment rate than did transport capacity deficit. The performance of the WEPP rill erosion equation is also favourable (NSE=0.95; R-2=0.97). The two power exponents in the model we established strengthen the role of soil detachment capacity in soil detachment rate and weaken that for transport capacity deficit. Soil detachment capacity and transport capacity deficit played important roles in the determination of soil detachment rate by rill flow. The results can be applied to implement the numerical modeling and prediction of rill erosion processes on steep loessial hillslopes. (c) 2019 John Wiley & Sons, Ltd. |
| WOS关键词 | OVERLAND-FLOW ; PHYSICAL PRINCIPLES ; WATER EROSION ; SEDIMENT LOAD ; PLATEAU ; WEPP ; ERODIBILITY ; DEPOSITION ; TRANSPORT ; CAPACITY |
| 资助项目 | National Natural Science Foundation of China[41907054] ; National Natural Science Foundation of China[41830758] ; National Natural Science Foundation of China[41907046] ; National Natural Science Foundation of China[41867015] ; National Natural Science Foundation of China[41601282] ; National Natural Science Foundation of China[41471230] ; National Key Research and Development Program of China[2017YFD0800502] ; National Key Research and Development Program of China[2016YFC0402401] ; China Postdoctoral Science Foundation[2018M643758] ; Special Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-C2] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000507408100001 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; Special Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131399]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Zhanli |
| 作者单位 | 1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.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 3.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Civil Engn, Xian 710049, Shaanxi, Peoples R China 4.Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Nan,Wang, Zhanli,Zhang, Qingwei,et al. Modelling the process of soil detachment by rill flow on steep loessial hillslopes[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2020:8. |
| APA | Shen, Nan,Wang, Zhanli,Zhang, Qingwei,Wu, Bing,&Liu, June.(2020).Modelling the process of soil detachment by rill flow on steep loessial hillslopes.EARTH SURFACE PROCESSES AND LANDFORMS,8. |
| MLA | Shen, Nan,et al."Modelling the process of soil detachment by rill flow on steep loessial hillslopes".EARTH SURFACE PROCESSES AND LANDFORMS (2020):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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