Runout and entrainment analysis of an extremely large rock avalanche-a case study of Yigong, Tibet, China
文献类型：期刊论文
| 作者 | Kang, Chao1; Chan, Dave1,2; Su, Fenghuan3 ; Cui, Peng3
|
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 14期号:1页码:123-139 |
| 关键词 | Rock avalanche Debris flow entrainment Yigong rock avalanche Debris runout modeling Soil erosion |
| ISSN号 | 1612-510X |
| 通讯作者 | Chao Kang |
| 英文摘要 | An extremely large rock avalanche occurred on April 9, 2000 at Yigong, Tibet, China. It started with an initial volume of material of 90 x 10(6) m(3) comprising mainly of loose material lying on the channel bed. The rock avalanche travelled around 10 km in horizontal distance and formed a 2.5-km-long by 2.5-km-wide depositional fan with a final volume of approximately 300 x 10(6) m(3). An energy-based debris flow runout model is used to simulate the movement process with a new entrainment model. The entrainment model considers both rolling and sliding motions in calculating the volume of eroded material. Entrainment calculation is governed by a second order partial differential equation which is solved using the finite difference method. During entrainment, it is considered that the total mass is changed due to basal erosion. Also the profile of the channel bed is adjusted accordingly due to erosion at the end of each calculation time step. For Yigong, the profile used in the simulation was extracted from a digital elevation model (DEM) with a resolution of 30 m x 30 m. Measurements obtained from site investigation, including deposition depth and flow height at specific location, are used to verify the model. Ground elevation-based DEM before and after the event is also used to verify the simulation results where access was difficult. It is found that the calculated runout distance and the modified deposition height agree with the field observations. Moreover, the back-calculated flow characteristics based on field observations, such as flow velocity, are also used for model verifications. The results indicate that the new entrainment model is able to capture the entrainment volume and depth, runout distance, and deposition height for this case. |
| 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] | DEBRIS FLOWS ; MODEL ; BED ; ASSEMBLIES ; EROSION ; SLIDES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393643900009 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/18497]  |
| 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.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB, Canada 2.Three Gorges Univ, Coll Civil Engn & Architecture, Yichang, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kang, Chao,Chan, Dave,Su, Fenghuan,et al. Runout and entrainment analysis of an extremely large rock avalanche-a case study of Yigong, Tibet, China[J]. LANDSLIDES,2017,14(1):123-139. |
| APA | Kang, Chao,Chan, Dave,Su, Fenghuan,&Cui, Peng.(2017).Runout and entrainment analysis of an extremely large rock avalanche-a case study of Yigong, Tibet, China.LANDSLIDES,14(1),123-139. |
| MLA | Kang, Chao,et al."Runout and entrainment analysis of an extremely large rock avalanche-a case study of Yigong, Tibet, China".LANDSLIDES 14.1(2017):123-139. |
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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