Large-scale landslide dam breach experiments: Overtopping and "overtopping and seepage" failures | |
Zhou, Gordon G. D.2,3,4; Li, Shuai1,3,4; Lu, Xueqiang3,4; Tang, Hui1 | |
刊名 | ENGINEERING GEOLOGY |
2022-07-01 | |
卷号 | 304页码:19 |
关键词 | Landslide dam Large-scale experiments Overtopping failure "Overtopping and seepage" failure Breach evolution Channel morphology |
ISSN号 | 0013-7952 |
DOI | 10.1016/j.enggeo.2022.106680 |
英文摘要 | Landslide dams form when landslide materials reach rivers causing complete or partial blockage. It is known that overtopping water flows and seepage flows are two crucial processes that induce dam failure. In several instances, the landslide dams collapse is caused by the coupled influence of seepage flows and overtopping water. This study aims to evaluate the contribution of seepage flows to the overtopping failure of landslide dams in terms of dam stability, breach duration, and flow discharge. We conducted two field experiment tests to simulate landslide dam failure modes: overtopping failure and overtopping-seepage coupling. Results show that the internal erosion due to seepage induces the loss of fine particles, resulting in a fourfold increase in dam deformation relative to when seepage is minimal. In the case overtopping and seepage failure, the outburst duration is shortened by two-thirds, but the peak outburst discharge is increased by nearly two times compared with the pure overtopping failure. Sediments accumulate at the downstream channel for overtopping failure, but erosion is observed before accumulation when the "overtopping and seepage" failure occurs. Fine grain sizes are limited to the downstream bed for both failure modes, which indicates the equal mobility of sediments involved in the outburst flood from a landslide dam breach. |
资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0902] ; National Natural Science Foundation of China[42007270] ; Key Research Program of Chinese Academy of Sciences[KFZD-SW-425] ; Sichuan Science and Technology Program[2019YJ0009] ; Helmholtz-OCPC Postdoc Program fellowship[ZD2019042] ; Sino-German Mobility programme[M-0145] ; Youth Innovation Promotion Association CAS[2022379] |
WOS关键词 | GRAIN-SIZE DISTRIBUTION ; BEDLOAD TRANSPORT ; SEDIMENT ; EROSION ; FLOOD ; RIVER ; HYDROGRAPH ; EARTHQUAKE ; SIMULATION ; STABILITY |
WOS研究方向 | Engineering ; Geology |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000860756300002 |
资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Sichuan Science and Technology Program ; Helmholtz-OCPC Postdoc Program fellowship ; Sino-German Mobility programme ; Youth Innovation Promotion Association CAS |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/56882] |
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 |
通讯作者 | Li, Shuai |
作者单位 | 1.GFZ, Sect 4 7 Earth Surface Proc Modelling, Potsdam, Germany 2.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, Gordon G. D.,Li, Shuai,Lu, Xueqiang,et al. Large-scale landslide dam breach experiments: Overtopping and "overtopping and seepage" failures[J]. ENGINEERING GEOLOGY,2022,304:19. |
APA | Zhou, Gordon G. D.,Li, Shuai,Lu, Xueqiang,&Tang, Hui.(2022).Large-scale landslide dam breach experiments: Overtopping and "overtopping and seepage" failures.ENGINEERING GEOLOGY,304,19. |
MLA | Zhou, Gordon G. D.,et al."Large-scale landslide dam breach experiments: Overtopping and "overtopping and seepage" failures".ENGINEERING GEOLOGY 304(2022):19. |
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