The formation and development of debris flows in large watersheds after the 2008 Wenchuan Earthquake
文献类型：期刊论文
| 作者 | Guo, Xiaojun1,2,3 ; Cui, Peng1,2; Li, Yong1,2; Zou, Qiang1,3; Kong, Yingde1,3
|
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2016 |
| 卷号 | 13期号:1页码:25-37 |
| 关键词 | Debris flows Triggering rainfall Formation Large watershed Wenchuan earthquake |
| ISSN号 | 1612-510X |
| 通讯作者 | Cui, Peng |
| 英文摘要 | The Wenchuan earthquake has caused abundance of loose materials supplies for debris flows. Many debris flows have occurred in watersheds in area beyond 20 km(2), presenting characteristics differing from those in small watersheds. The debris flows yearly frequency decreases exponentially, and the average debris flow magnitude increases linearly with watershed size. The rainfall thresholds for debris flows in large watersheds were expressed as I = 14.7 D (-0.79) (2 h < D < 56 h), which is considerably higher than those in small watersheds as I = 4.4 D (-0.70) (2 h < D < 37 h). A case study is conducted in Ergou, 39.4 km(2) in area, to illustrate the formation and development processes of debris flows in large watersheds. A debris flow develops in a large watershed only when the rainfall was high enough to trigger the wide-spread failures and erosions on slope and realize the confluence in the watershed. The debris flow was supplied by the widely distributed failures dominated by rill erosions (14 in 22 sources in this case). The intermittent supplying increased the size and duration of debris flow. While the landslide dam failures provided most amounts for debris flows (57 % of the total amount), and amplified the discharge suddenly. During these processes, the debris flow velocity and density increased as well. The similar processes were observed in other large watersheds, indicating this case is representative. |
| 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] | RAINFALL INTENSITY ; SHALLOW LANDSLIDES ; DURATION CONTROL ; INITIATION ; COLORADO |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000369433900003 |
| 公开日期 | 2016-04-26 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/15086]  |
| 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 中国科学院水利部成都山地灾害与环境研究所 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Surface Proc & Hazards, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.Asian Network Debris Flow, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Xiaojun,Cui, Peng,Li, Yong,et al. The formation and development of debris flows in large watersheds after the 2008 Wenchuan Earthquake[J]. LANDSLIDES,2016,13(1):25-37. |
| APA | Guo, Xiaojun,Cui, Peng,Li, Yong,Zou, Qiang,&Kong, Yingde.(2016).The formation and development of debris flows in large watersheds after the 2008 Wenchuan Earthquake.LANDSLIDES,13(1),25-37. |
| MLA | Guo, Xiaojun,et al."The formation and development of debris flows in large watersheds after the 2008 Wenchuan Earthquake".LANDSLIDES 13.1(2016):25-37. |
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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