IMHE OpenIR  > 山地灾害与地表过程重点实验室
Experimental investigation on the longitudinal evolution of landslide dam breaching and outburst floods
Zhou, Gordon G. D.1,2; Zhou, Mingjun1,2; Shrestha, Mandira Singh3; Song, Dongri1,2; Choi, Clarence E.4,5,6; Cui, Kahlil Fredrick E.1,2; Peng, Ming7; Shi, Zhenming7; Zhu, Xinghua8; Chen, Huayong1,2
Corresponding AuthorZhou, Mingjun(mjzhou@imde.ac.cn)
2019-06-01
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
Volume334Pages:29-43
AbstractAccurate prediction of the evolution of a landslide darn that is breached due to overtopping failure is necessary to estimate the outflow hydrograph and the resulting inundation. In this study, physical flume tests on the breaching of landslide dams were conducted. A wide grain size distribution with unconsolidated dam material was used. Dam breaching was initiated by cutting a notch across the crest of the darn adjacent to the side wall of the flume. This allowed water to escape from the dam while a steady inflow of water was continuously supplied upstream. The effects of upstream inflow on the timescales and magnitudes of the peak discharges and the time to inflection point were also investigated. Experimental results reveal that the whole hydrodynamic process of dam breaching can be divided into three stages defined by clear inflection points and peak discharge. A new longitudinal evolution model is proposed. This model captures the initial increase of the soil erosion rate (of landslide dam) and its subsequent decrease along the longitudinal direction. In addition, a linear relationship between the soil erosion rate and shear stress (of water flow) was observed and this is similar to that observed in large-scale natural landslide dams. Furthermore, soil erosion resistances (of landslide dam) against water flow above are observed to increase with the concentration of entrained sediments along the flow direction. (C) 2019 Elsevier B.V. All rights reserved.
KeywordLandslide dam Overtopping failure Hydrograph Erosion rate
DOI10.1016/j.geomorph.2019.02.035
Indexed BySCI
WOS KeywordDEBRIS-FLOW ; WENCHUAN EARTHQUAKE ; HYDRAULIC EROSION ; FAILURE ; SIMULATION ; PROPAGATION ; SEDIMENT ; RIVER ; EMBANKMENTS ; ERODIBILITY
Language英语
Funding ProjectNational Natural Science Foundation of China[41731283] ; National Natural Science Foundation of China[11672318] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000469307200002
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26224
Collection山地灾害与地表过程重点实验室
Corresponding AuthorZhou, Mingjun
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Int Ctr Integrated Mt Dev ICIMOD, Patan, Nepal
4.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Peoples R China
5.HKUST Jockey Club Inst Adv Study, Hong Kong, Peoples R China
6.HKUST Fok Ying Tung Grad Sch, Nansha, Peoples R China
7.Tongji Univ, Dept Geotech Engn, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai, Peoples R China
8.Changan Univ, Coll Geol Engn & Surveying, Key Lab Western China Mineral Resources & Geol En, Xian, Shaanxi, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhou, Gordon G. D.,Zhou, Mingjun,Shrestha, Mandira Singh,et al. Experimental investigation on the longitudinal evolution of landslide dam breaching and outburst floods[J]. GEOMORPHOLOGY,2019,334:29-43.
APA Zhou, Gordon G. D..,Zhou, Mingjun.,Shrestha, Mandira Singh.,Song, Dongri.,Choi, Clarence E..,...&Chen, Huayong.(2019).Experimental investigation on the longitudinal evolution of landslide dam breaching and outburst floods.GEOMORPHOLOGY,334,29-43.
MLA Zhou, Gordon G. D.,et al."Experimental investigation on the longitudinal evolution of landslide dam breaching and outburst floods".GEOMORPHOLOGY 334(2019):29-43.
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