IMHE OpenIR  > 山地灾害与地表过程重点实验室
Depositional mechanisms and morphology of debris flow: physical modelling
Zhou, Gordon G. D.1,2; Li, Shuai1,2; Song, Dongri1,2; Choi, Clarence E.2,3,4,5; Chen, Xiaoqing1
Corresponding AuthorLi, Shuai(lishuai@imde.ac.cn)
2019-02-01
Source PublicationLANDSLIDES
ISSN1612-510X
Volume16Issue:2Pages:315-332
AbstractA comprehensive understanding of the deposition mechanisms and morphology of debris flows is necessary to delineate the extent of a debris flow hazard. However, due to the wide range of debris flow compositions and the complex topography in the field, there remains a deficiency of fundamental understanding on how the effects of grain-size distribution, water content, and channel slope influence the deposition mechanisms and morphology of debris flow. In this study, a series of experimental tests were carried out using a flume with a horizontal outflow plane to discern the effects of particle size, water content, and slope on the deposition morphology and grain size segregation on the deposition fan. Results reveal that the experimental debris flows are under either viscous or collisional flow regimes. Most experimental debris flow fronts lack high pore fluid pressures, emphasizing the formation of deposits via grain-grain and grain-bed friction and collisions; also high excess pore fluid pressure (positive) behind the front head is measured and it is beneficial for the mobility of debris flows. Both the deposit area and runout-width ratio are positively correlated to the Bagnold and Savage numbers and the initial water contents. Furthermore, an increase of fines content reduces the runout distance. However, this feature is not as obvious for high water content flows (w=28.5% in this study). Moreover, smoother transition topography between the transportation and deposition zone leads to longer runout distances. For debris flows with a high solid fraction (C-s>0.52 in this study), particle sorting is quite inhibited in the deposit fan.
KeywordDebris flow Flume model tests Deposit morphology Flow regimes Grain size segregation
DOI10.1007/s10346-018-1095-9
Indexed BySCI
WOS KeywordFLUIDIZED GRANULAR MASSES ; 3-DIMENSIONAL TERRAIN ; RUNOUT ; FIELD ; AVALANCHES ; LANDSLIDE ; MOBILITY ; BEHAVIOR ; CHANNEL
Language英语
Funding ProjectNational Natural Science Foundation of China[11672318] ; National Natural Science Foundation of China[41731283] ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; CAS Light of West China Program[Y6R2220220] ; CAS Pioneer Hundred Talents Program ; Research Grants Council of the Government of Hong Kong SAR, China[T22-603/15-N]
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000460468500009
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; CAS Light of West China Program ; CAS Pioneer Hundred Talents Program ; Research Grants Council of the Government of Hong Kong SAR, China
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25319
Collection山地灾害与地表过程重点实验室
Corresponding AuthorLi, Shuai
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.Hong Kong Univ Sci & Technol, HKSAR, Dept Civil & Environm Engn, Hong Kong, Peoples R China
4.HKUST Jockey Club Inst Adv Study, HKSAR, Hong Kong, Peoples R China
5.HKUST Fok Ying Tung Grad Sch, Guangzhou, Guangdong, 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.,Li, Shuai,Song, Dongri,et al. Depositional mechanisms and morphology of debris flow: physical modelling[J]. LANDSLIDES,2019,16(2):315-332.
APA Zhou, Gordon G. D.,Li, Shuai,Song, Dongri,Choi, Clarence E.,&Chen, Xiaoqing.(2019).Depositional mechanisms and morphology of debris flow: physical modelling.LANDSLIDES,16(2),315-332.
MLA Zhou, Gordon G. D.,et al."Depositional mechanisms and morphology of debris flow: physical modelling".LANDSLIDES 16.2(2019):315-332.
Files in This Item:
File Name/Size DocType Version Access License
Depositional mechani(4914KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhou, Gordon G. D.]'s Articles
[Li, Shuai]'s Articles
[Song, Dongri]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhou, Gordon G. D.]'s Articles
[Li, Shuai]'s Articles
[Song, Dongri]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhou, Gordon G. D.]'s Articles
[Li, Shuai]'s Articles
[Song, Dongri]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Depositional mechanisms and morphology of debris flow --physical modelling.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.