中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 成都山地灾害与环境研究所
  3. 中国科学院水利部成都山地灾害与环境研究所
Identifying post-earthquake debris flow hazard using Massflow

文献类型：期刊论文

作者Horton Alexander J.1,2,3; Hales Tristram C.1,2; Ouyang Chaojun4,5; Fan Xuanmei4,5
刊名ENGINEERING GEOLOGY
出版日期2019
卷号258页码:UNSP 105134
ISSN号0013-7952
DOI10.1016/j.enggeo.2019.05.011
产权排序4
通讯作者Horton, Alexander J.(Alexander.Horton@Aalto.fi)
文献子类Article
英文摘要Catastrophic debris flows are common after large earthquakes and pose a significant risk for recovering communities. The depositional volume of these large debris flows is often much greater than the initiation volume, suggesting that bulking of the flow plays an important role in determining their volume, speed, and runout distance. Observations from recent earthquakes have driven progress in understanding the relationship between triggering rainfall events and the timing of post earthquake debris flows. However, we lack an adequate mechanism for quantifying bulking and applying it within a hazard context. Here we apply a 2D dynamic debris flow model (Massflow) that incorporates a process-based expression of basal entrainment to understand how debris flow bulking may occur within post earthquake catchments and develop hazard maps. Focussing on catchments in the epicentral area of the 2008 M-w 7.9 Wenchuan Earthquake, we first parameterised the model based on a large debris flow that occurred within the Hongchun catchment, before applying the calibrated model to adjoining catchments. A model sensitivity analysis identified three main controls on debris flow bulking; the saturation level of entrainable material along the flow pathway, and the size and position of initial mass failures. The model demonstrates that the difference between small and very large debris flows occur across a narrow range of pore-water ratios (lambda). Below lambda = 0.65 flows falter at the base of hillslopes and come to rest in the valley bottom, above lambda = 0.70 they build sufficient mass and momentum to sustain channelised flow and transport large volumes of material beyond the valley confines. Finally, we applied the model across different catchments to develop hazard maps that demonstrate the utility of Massflow in post-earthquake planning within the Wenchuan epicentral region.
电子版国际标准刊号1872-6917
WOS关键词2008 WENCHUAN EARTHQUAKE ; ENTRAINMENT ; MODEL ; PROPAGATION ; LANDSLIDES ; AVALANCHES ; RUNOUT
资助项目Newton Fund ; Natural Environmental Research Council ; Economic and Social Research Council ; National Science Foundation for China[NE/N012240/1]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000483909000010
出版者ELSEVIER
资助机构Newton Fund ; Natural Environmental Research Council ; Economic and Social Research Council ; National Science Foundation for China
源URL[http://ir.imde.ac.cn/handle/131551/27156]  
专题中国科学院水利部成都山地灾害与环境研究所
通讯作者Horton Alexander J.
作者单位1.School of Earth and Ocean Sciences, Cardiff University, Cardiff CF10 3AT, UK;
2.Sustainable Places Research Institute, Cardiff University, Cardiff CF10 3AT, UK;
3.Water and Development Research Group, Aalto University, Finland;
4.Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu 610041, PR China;
5.Institute of Mountain Hazards & Environment, Chinese Academy of Sciences, Sichuan 610041, PR China
推荐引用方式
GB/T 7714		 Horton Alexander J.,Hales Tristram C.,Ouyang Chaojun,et al. Identifying post-earthquake debris flow hazard using Massflow[J]. ENGINEERING GEOLOGY,2019,258:UNSP 105134.
APA Horton Alexander J.,Hales Tristram C.,Ouyang Chaojun,&Fan Xuanmei.(2019).Identifying post-earthquake debris flow hazard using Massflow.ENGINEERING GEOLOGY,258,UNSP 105134.
MLA Horton Alexander J.,et al."Identifying post-earthquake debris flow hazard using Massflow".ENGINEERING GEOLOGY 258(2019):UNSP 105134.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。