Dynamic process analysis for the formation of Yangjiagou landslide-dammed lake triggered by the Wenchuan earthquake, China
文献类型：期刊论文
| 作者 | Zhou, Jia-wen1,2; Cui, Peng1 ; Fang, Hua1
|
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 10期号:3页码:331-342 |
| 关键词 | Wenchuan earthquake Landslide River blocking Dammed lake Numerical simulation Dynamic process |
| ISSN号 | 1612-510X |
| 通讯作者 | Zhou, Jia-wen |
| 英文摘要 | The damming of rivers by landslides resulting in the formation of a lake was one of the typical secondary geological hazards triggered by the Wenchuan earthquake which occurred on May 12, 2008. Some landslide-dammed lakes were at a high risk of causing further damage since the rainstorm season was expected soon after the earthquake. Understanding the dynamic processes in the formation of landslide-dammed lakes is helpful in planning the mitigation measures. The Yangjiagou landslide-dammed lake was selected as a case study to investigate the typical processes of dam formation. The dynamic simulation of the formation of the Yangjiagou landslide-dammed lake was divided into two steps: the landslide step and the overflow/overtopping step. Two-dimensional discrete element method (DEM) was adopted to investigate the mechanics of the Yangjiagou landslide. The landslide process was found to be controlled by the bond strength and residual friction coefficient of the DEM models. Computational results show that the formation of the landslide dam took approximately 35 s. The maximum velocity of a typical particle was approximately 26.8 m/s. The shallow-water equation and finite difference method were used to analyze the hydrodynamic mechanisms of the overflow process of the landslide-dammed lake. Computational results show that overflow would have occurred 15.1 h after the river was blocked, and overtopping failure occurs for the landslide dam in the rainstorm season when the water flow is large enough, causing a major disaster. |
| 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] | RAPID LANDSLIDES ; MODEL ; ROCK ; DAMS ; MOTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319768400008 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/8320]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2015_Vol12 No.1 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 & Earth Surface Proc, Chengdu 610044, Sichuan, Peoples R China 2.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Jia-wen,Cui, Peng,Fang, Hua. Dynamic process analysis for the formation of Yangjiagou landslide-dammed lake triggered by the Wenchuan earthquake, China[J]. LANDSLIDES,2013,10(3):331-342. |
| APA | Zhou, Jia-wen,Cui, Peng,&Fang, Hua.(2013).Dynamic process analysis for the formation of Yangjiagou landslide-dammed lake triggered by the Wenchuan earthquake, China.LANDSLIDES,10(3),331-342. |
| MLA | Zhou, Jia-wen,et al."Dynamic process analysis for the formation of Yangjiagou landslide-dammed lake triggered by the Wenchuan earthquake, China".LANDSLIDES 10.3(2013):331-342. |
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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