Modelling sediment transport capacity of rill flow for loess sediments on steep slopes
文献类型：期刊论文
| 作者 | Wu, Bing1,2,4; Wang, Zhanli1,2; Shen, Nan1; Wang, Sha3 |
| 刊名 | Catena
 |
| 出版日期 | 2016-12-01 |
| 卷号 | 147页码:453-462 |
| ISSN号 | 0341-8162 |
| 关键词 | Sediment transport capacity Flow discharge Slope gradient Flow velocity Rill flow Loess sediments Steep slope |
| DOI | 10.1016/j.catena.2016.07.030 |
| 通讯作者 | Wang, zhanli(zwang@nwsuaf.edu.ca) |
| 英文摘要 | Sediment transport is an important aspect of soil erosion, and sediment transport capacity (t-c) is a key to establishing process -based erosion models. a lot of studies exist that have determined t-c for overland flow, however, few studies have been conducted to determine t-c for loess sediments on steep slopes. experimental data for this region are thus needed. the objectives of this study are to formulate new equations to describe t-c and evaluate the suitability of these equations for loess sediments on steep slopes. the slope gradients in this study ranged from 10.51% to 38.39%, and flow discharges per unit width varied from 1.11 x 10(-3) m(2) s(-1) to 3.78 x 10(-3) m(2) s(-1). results showed that 11 increased as a power function with flow discharge and slope gradient, with r-2 = 0.99 and nash -sut(c)liffe model efficiency (nse) = 0.99. t, was more sensitive to flow discharge than slope gradient. t-c increased as a power function with mean flow velocity, which was satisfied to predict t-c with r-2 = 0.99 and nse = 0.99. shear stress (r2 = 0.89, nse = 0.88) was also a good predictor of t-c, and stream power (r-2 = 0.96, nse = 0.96) was a better predictor of t-c than shear stress. however, unit stream power was not a good predictor to estimate t-c in our study, with r-2 = 0.63 and nse = 0.62. these findings offer a new approach for predicting t-c for loess sediments on steep slopes. 2016 elsevier b.v. all rights reserved. |
| WOS关键词 | SOIL-EROSION MODEL ; OVERLAND-FLOW ; ERODING RILLS ; EQUATION ; PLATEAU ; CHINA ; HYDRAULICS ; SURFACES ; VELOCITY ; EUROSEM |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000385598800044 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374854 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Zhanli |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi Provinc, Peoples R China 2.Minist Water Resources, Yangling, Shaanxi Provinc, Peoples R China 3.Northwest A&F Univ, Coll Resources & Environm, Yangling, Shaanxi Provinc, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Bing,Wang, Zhanli,Shen, Nan,et al. Modelling sediment transport capacity of rill flow for loess sediments on steep slopes[J]. Catena,2016,147:453-462. |
| APA | Wu, Bing,Wang, Zhanli,Shen, Nan,&Wang, Sha.(2016).Modelling sediment transport capacity of rill flow for loess sediments on steep slopes.Catena,147,453-462. |
| MLA | Wu, Bing,et al."Modelling sediment transport capacity of rill flow for loess sediments on steep slopes".Catena 147(2016):453-462. |
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来源：中国科学院大学
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