A preliminary study of the failure mechanisms of cascading landslide dams
文献类型：期刊论文
| 作者 | Zhou, Gordon G. D.1,2 ; Cui, Peng1,2; Zhu, Xinghua1,2; Tang, Jinbo1,2; Chen, Huayong1,2; Sun, Qicheng3
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| 刊名 | INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
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| 出版日期 | 2015-09-01 |
| 卷号 | 30期号:3页码:223-234 |
| ISSN号 | 1001-6279 |
| 关键词 | Cascading failure Landslide dam Upstream flow Failure mode Landscape evolution Debris flow |
| 通讯作者 | Cui, Peng |
| 英文摘要 | Landslide dams commonly form when mass earth or rock movements reach a river channel and cause a complete or partial blockage of the channel. Intense rainfalls can induce upstream flows along a sloping channel that significantly affect downstream landslide dams. If a series of landslide dams are collapsed by incoming mountain torrents (induced by intense rainfall), large debris flows can form in a very short period. Furthermore, the failure of these dams can amplify the magnitude and scale of debris flows in the flow direction. The catastrophic debris flows that occurred in Zhouqu County, China on 8 August 2010 were caused by intense rainfall and the upstream cascading failure of landslide dams along the gullies. Incorporating the role of outburst floods associated with the complete or partial failure of landslide dams is an interesting problem usually beyond the scope of analysis because of the inherent modeling complexity. To understand the cascading failure modes of a series of landslide dams, and the dynamic effect these failures have on the enlargement of debris flow scales, experimental tests are conducted in sloping channels mimicking field conditions, with the modeled landslide dams distributed along a sloping channel and crushed by different upstream flows. The failure modes of three different cascades of landslide dams fully or partially blocking a channel river are parametrically studied. This study illustrates that upstream flows can induce a cascading failure of the landslide dams along a channel. Overtopping is the primary failure mechanism, while piping and erosion can also induce failures for different constructed landslide dams. A cascading failure of landslide dams causes a gradually increasing flow velocity and discharge of the front flow, resulting in an increase in both diameter and percentage of the entrained coarse particles. Furthermore, large landslide blockages can act to enhance the efficiency of river incision, or conversely to induce aggradation of fluvial sediments, depending on the blockage factor of the landslide dams and upstream discharge. (C) 2015 Published by Elsevier B.V. on behalf of International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Environmental Sciences ; Water Resources |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Water Resources |
| 关键词[WOS] | PAPUA-NEW-GUINEA ; NEW-ZEALAND ; DEBRIS FLOW ; HAZARD ASSESSMENT ; HSIAOLIN VILLAGE ; MOUNTAIN BELT ; SOUTHERN ALPS ; CHANNEL ; HYDRAULICS ; EARTHQUAKE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000363338600004 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/13832]  |
| 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, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China 2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 3.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Gordon G. D.,Cui, Peng,Zhu, Xinghua,et al. A preliminary study of the failure mechanisms of cascading landslide dams[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2015,30(3):223-234. |
| APA | Zhou, Gordon G. D.,Cui, Peng,Zhu, Xinghua,Tang, Jinbo,Chen, Huayong,&Sun, Qicheng.(2015).A preliminary study of the failure mechanisms of cascading landslide dams.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,30(3),223-234. |
| MLA | Zhou, Gordon G. D.,et al."A preliminary study of the failure mechanisms of cascading landslide dams".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 30.3(2015):223-234. |
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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