Measurement of rill and ephemeral gully flow velocities and their model expression affected by flow rate and slope gradient
文献类型：期刊论文
| 作者 | Ban, Y. Y.2,3; Wang, W.3 ; Lei, T. W.1,3,4
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| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 589页码:8 |
| 关键词 | Flow velocity Flow rate Slope gradient Model fitting |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2020.125172 |
| 通讯作者 | Lei, T. W.(leitingwu@cau.edu.cn) |
| 英文摘要 | Water flow velocities in rill and ephemeral gully are useful for estimating hydrodynamics in the study on soil erosion. Laboratory experiments were conducted to measure erosive rill and ephemeral gully flow velocities, including nine unit width flow rates of 0.17, 0.33, 0.67, 1.33, 2.67, 5.33, 10.67, 21.33, and 42.67x10(-3) m(2) s(-1), and five slope gradients of 8.7%, 17.6%, 26.8%, 36.4%, and 46.6%, on sandpaper slope glued with silt loam soil materials to imitate fixed rill and ephemeral gully beds, using an electrolyte tracer method. The flow velocities measured in this research ranged from 0.31 to 3.34 m s(-1) for sediment-free water flow. The flow velocity fitted well with unit width flow rate and slope gradient by a power function, yielding an improved model with higher coefficient of determination than that related flow velocity to flow rate alone. The improved model is applicable for flow velocity and soil erosion predictions. |
| WOS关键词 | WATER-FLOW ; SOIL DETACHMENT ; SEDIMENT YIELD ; EROSION ; HYDRAULICS ; ROUGHNESS ; FROZEN ; DISCHARGE ; HILLSLOPE ; STONY |
| 资助项目 | National Natural Science Foundation of China[41730645] ; National Natural Science Foundation of China[41230746] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000568830400039 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156877]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lei, T. W. |
| 作者单位 | 1.Shangdong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271000, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 3.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China 4.CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ban, Y. Y.,Wang, W.,Lei, T. W.. Measurement of rill and ephemeral gully flow velocities and their model expression affected by flow rate and slope gradient[J]. JOURNAL OF HYDROLOGY,2020,589:8. |
| APA | Ban, Y. Y.,Wang, W.,&Lei, T. W..(2020).Measurement of rill and ephemeral gully flow velocities and their model expression affected by flow rate and slope gradient.JOURNAL OF HYDROLOGY,589,8. |
| MLA | Ban, Y. Y.,et al."Measurement of rill and ephemeral gully flow velocities and their model expression affected by flow rate and slope gradient".JOURNAL OF HYDROLOGY 589(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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