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Numerical analysis of dynamics of debris flow over erodible beds in Wenchuan earthquake-induced area
文献类型：期刊论文
| 作者 | Ouyang, Chaojun1,2 ; He, Siming1,2; Tang, Chuan3
|
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2015-08-26 |
| 卷号 | 194页码:62-72 |
| 关键词 | Finite difference method MacCormack scheme Debris flow Erodible bed Sediment Entrainment rate |
| ISSN号 | 0013-7952 |
| 通讯作者 | Ouyang, Chaojun |
| 英文摘要 | The basal entrainment of debris flows play a significant role in its amplification and the final volume of deposition could be several to hundred times of its initial volume. In this paper, the shallow water equations coupled with basal material entrainment applied in debris flows have been given to demonstrate the amplification. A new basal entrainment model taking advantage of both Coulomb and Voellmy frictional laws are proposed, providing a unified formula to simulate the stop-and-go process of debris flows. Both time and space second-order MacCormack-TVD finite difference method is suggested to solve the coupled equations. Numerical comparisons with USGS flume experiment and Hongchun gully debris flow in Wenchuan earthquake-induced area are carried out to prove its effectiveness. It is established that the momentum exchange term between the flows and the basal materials has a significant influence on the dynamic characteristics and the entrainment effects are essential to model the dynamic process of debris flows in an earthquake-induced area. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Engineering, Geological ; Geosciences, Multidisciplinary |
| 研究领域[WOS] | Engineering ; Geology |
| 关键词[WOS] | DAM-BREAK FLOWS ; GRANULAR FLOWS ; NEW-MODEL ; ENTRAINMENT ; AVALANCHES ; RUNOUT ; SIMULATION ; LANDSLIDES ; TOPOGRAPHY ; DEPOSITION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360416400007 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/10917]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Sichuan, Peoples R China 2.Chinese Acad Sci, IMHE, Chengdu 610041, Sichuan, Peoples R China 3.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ouyang, Chaojun,He, Siming,Tang, Chuan. Numerical analysis of dynamics of debris flow over erodible beds in Wenchuan earthquake-induced area[J]. ENGINEERING GEOLOGY,2015,194:62-72. |
| APA | Ouyang, Chaojun,He, Siming,&Tang, Chuan.(2015).Numerical analysis of dynamics of debris flow over erodible beds in Wenchuan earthquake-induced area.ENGINEERING GEOLOGY,194,62-72. |
| MLA | Ouyang, Chaojun,et al."Numerical analysis of dynamics of debris flow over erodible beds in Wenchuan earthquake-induced area".ENGINEERING GEOLOGY 194(2015):62-72. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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