The formation and failure of debris flow-dams, background, key factors and model tests: case studies from China
文献类型：期刊论文
| 作者 | Dang, Chao1,2,3; Cui, Peng1,2 ; Cheng, Zun-lan1,2
|
| 刊名 | ENVIRONMENTAL GEOLOGY
 |
| 出版日期 | 2009-06-01 |
| 卷号 | 57期号:8页码:1901-1910 |
| 关键词 | Debris flow Dam-forming Critical index Key factors Model test China |
| ISSN号 | 0943-0105 |
| 通讯作者 | Chao Dang |
| 合作状况 | 其它 |
| 英文摘要 | Temporary dams can be formed by the sudden injection of debris flow into main streams by some favorable geomorphologic and hydraulic conditions, resulting in extensive inundations upstream and catastrophic floods downstream due to dam breaches and consequently dramatic changes of channels and valleys. Expeditious means of assessing dam-forming potential are necessary, particularly in geologically active regions. Complete blockages or dam formations are significantly related to the discharge ratio and velocity ratio between the tributary and the main stream, the bulk density of the debris flow, confluent angles and the degree of unevenness of grain sizes. In order to set up a critical index/C for dam formation, 19 groups of flume tests were conducted. The results showed that there were three types of blockage in the intersections, and dam-forming processes were mainly controlled by the product of the dimensionless momentum ratio and the degree of unevenness of grain sizes in the debris flow. Complete blockages or dam formations occurred when C > 83.4, whereas semi-blockages were formed or no dams were formed when C < 71.5, which had been judged to be feasible by historical instances of dam formation in China. Dam failures commonly resulted from overtopping. No piping was observed in the course of dam failure, and the time elapsed between dams can be denoted by a linear relation with the momentum ratio. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 关键词[WOS] | BRITISH-COLUMBIA ; DAMMED LAKES ; DRAINAGE ; FLOODS ; ALPS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000266372600020 |
| 公开日期 | 2010-11-01 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/2407]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 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 & Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dang, Chao,Cui, Peng,Cheng, Zun-lan. The formation and failure of debris flow-dams, background, key factors and model tests: case studies from China[J]. ENVIRONMENTAL GEOLOGY,2009,57(8):1901-1910. |
| APA | Dang, Chao,Cui, Peng,&Cheng, Zun-lan.(2009).The formation and failure of debris flow-dams, background, key factors and model tests: case studies from China.ENVIRONMENTAL GEOLOGY,57(8),1901-1910. |
| MLA | Dang, Chao,et al."The formation and failure of debris flow-dams, background, key factors and model tests: case studies from China".ENVIRONMENTAL GEOLOGY 57.8(2009):1901-1910. |
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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