IMHE OpenIR  > 山地灾害与地表过程重点实验室
The influence of temporal and spatial variations on phase separation in debris flow deposition
Wang, Fei1; Wang, Jiading1; Chen, Xiaoqing2; Chen, Jiangang2
Corresponding AuthorWang, Jiading(wangjd@nwu.edu.cn)
2019-03-01
Source PublicationLANDSLIDES
ISSN1612-510X
Volume16Issue:3Pages:497-514
AbstractThe phase separation mechanism in a natural debris flow as a solid-liquid mixture is an important aspect in its movement and deposition. In this paper, the relationship between debris flow discharges and densities is studied based on the field observations of the Jiangjia Gully, China. A number of experiments are conducted to study the phase separation mechanism of debris flows, and the characteristics of their depositions over deceleration baffles with varying flow density and bottom slopes. The phase separation mechanism of natural debris flows is analyzed based on the mentioned experimental and field observations. During the decreasing debris flow, the flow density reduces with reduction of the flow discharge, indicating the important role of the flow discharge in changing the flow density as a driving factor. Temporal variations of the debris flow density can have two chronological orders: (a) dilute-viscous-dilute debris flow and (b) viscous-dilute debris flow. The variation order of the flow density has an important influence on the phase separation mechanism and the final deposition morphology. The experimental results show that the bottom slope and the flow density have opposite effects on the phase separation mechanism. Increasing the flow density increases the viscosity of the debris flow, decreasing the phase separation of the solid-liquid mixture. Increasing the bottom slope promotes phase separation by increasing the shear rate inside the debris flow. As a result, the phase separation mechanism of natural debris flow is mostly related to the temporal and spatial variations of the flow pattern and the flow density.
KeywordDebris flow Peak discharge Flow density Experimental analysis Deceleration baffles
DOI10.1007/s10346-018-1119-5
Indexed BySCI
WOS KeywordLABORATORY ANALYSIS ; FIELD ; MITIGATION ; VELOCITY ; CHANNEL ; RUNOUT ; SEGREGATION ; MECHANISMS ; INITIATION ; DOLOMITES
Language英语
Funding ProjectNational Natural Science Foundation of China[41630639] ; National Natural Science Foundation of China[41807252] ; National Key Research and Development Plan[2018YFC1504703] ; International Cooperation and Exchange of the National Science Foundation of China[41661144028] ; China Postdoctoral Science Foundation[2018M633558]
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000461573100004
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Plan ; International Cooperation and Exchange of the National Science Foundation of China ; China Postdoctoral Science Foundation
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25303
Collection山地灾害与地表过程重点实验室
Corresponding AuthorWang, Jiading
Affiliation1.Northwest Univ, State Key Lab Continental Dynam, Dept Geol, Xian 710069, Shaanxi, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Wang, Fei,Wang, Jiading,Chen, Xiaoqing,et al. The influence of temporal and spatial variations on phase separation in debris flow deposition[J]. LANDSLIDES,2019,16(3):497-514.
APA Wang, Fei,Wang, Jiading,Chen, Xiaoqing,&Chen, Jiangang.(2019).The influence of temporal and spatial variations on phase separation in debris flow deposition.LANDSLIDES,16(3),497-514.
MLA Wang, Fei,et al."The influence of temporal and spatial variations on phase separation in debris flow deposition".LANDSLIDES 16.3(2019):497-514.
Files in This Item:
File Name/Size DocType Version Access License
The influence of tem(2460KB)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
[Wang, Fei]'s Articles
[Wang, Jiading]'s Articles
[Chen, Xiaoqing]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Fei]'s Articles
[Wang, Jiading]'s Articles
[Chen, Xiaoqing]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Fei]'s Articles
[Wang, Jiading]'s Articles
[Chen, Xiaoqing]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: The influence of temporal and spatial variations on phase separation in debris flow deposition.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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