Hybrid Simulation of the Initiation and Runout Characteristics of a Catastrophic Debris Flow
文献类型：期刊论文
| 作者 | CHEN Hong-Xin ; ZHANG Li-Min ; ZHANG Shuai ; XIANG Bo ; WANG Xiao-Feng |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2013-04 |
| 卷号 | 10期号:2页码:219-232 |
| 关键词 | Debris flow Landslide Rain-induced landslide Surface runoff Runout distance Wenchuan earthquake Numerical simulation |
| 通讯作者 | ZHANG Li-Min |
| 英文摘要 | On 13 August 2010, a catastrophic debris flow with a volume of 1.17 million m3 occurred in Xiaojiagou Ravine near Yingxiu town of Wenchuan county in Sichuan Province, China. The main source material was the landslide deposits retained in the ravine during the 2008 Wenchuan earthquake. This paper describes a two-dimensional hybrid numerical method that simulates the entire process of the debris flow from initiation to transportation and finally to deposition. The study area is discretized into a grid of square zones. A two dimensional finite difference method is then applied to simulate the rainfall-runoff and debris flow runout processes. The analysis is divided into three steps; namely, rainfall-runoff simulation, mixing water and solid materials, and debris flow runout simulation. The rainfall-runoff simulation is firstly conducted to obtain the cumulative runoff near the location of main source material and at the outlet of the first branch. The water and solid materials are then mixed to create an inflow hydrograph for the debris flow runout simulation. The occurrence time and volume of the debris flow can be estimated in this step. Finally the runout process of the debris flow is simulated. When the yield stress is high, it controls the deposition zone. When the yield stress is medium or low, both yield stress and viscosity influence the deposition zone. The flow velocity is largely influenced by the viscosity. The estimated yield stress by the equation, ty = rghsinq, and the estimated viscosity by the equation established by Bisantino et al. (2010) provide good estimates of the area of the debris flow fan and the distribution of deposition depth. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-04-26 |
| 源URL | [http://192.168.143.20:8080/handle/131551/5211]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2013_Vol10 No.2 |
| 推荐引用方式 GB/T 7714 | CHEN Hong-Xin,ZHANG Li-Min,ZHANG Shuai,et al. Hybrid Simulation of the Initiation and Runout Characteristics of a Catastrophic Debris Flow[J]. Journal of Mountain Science,2013,10(2):219-232. |
| APA | CHEN Hong-Xin,ZHANG Li-Min,ZHANG Shuai,XIANG Bo,&WANG Xiao-Feng.(2013).Hybrid Simulation of the Initiation and Runout Characteristics of a Catastrophic Debris Flow.Journal of Mountain Science,10(2),219-232. |
| MLA | CHEN Hong-Xin,et al."Hybrid Simulation of the Initiation and Runout Characteristics of a Catastrophic Debris Flow".Journal of Mountain Science 10.2(2013):219-232. |
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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