IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2013  > Vol10 No.2
Influence of Fine Sediment on the Fluidity of Debris Flows
Norifumi HOTTA; Takahiro KANEKO; Tomoyuki IWATA; Haruo NISHIMOTO
Corresponding AuthorNorifumi HOTTA
Source PublicationJournal of Mountain Science
AbstractDebris flows include a great diversity of grain sizes with inherent features such as inverse grading, particle size segregation, and liquefaction of fine sediment. The liquefaction of fine sediment affects the fluidity of debris flows, although the behavior and influence of fine sediment in debris flows have not been examined sufficiently. This study used flume tests to detect the effect of fine sediment on the fluidity of laboratory debris flows consisting of particles with various diameters. From the experiments, the greatest sediment concentration and flow depth were observed in the debris flows mixed with fine sediment indicating increased flow resistance. The experimental friction coefficient was then compared with the theoretical friction coefficient derived by substituting the experimental values into the constitutive equations for debris flow. The theoretical friction coefficient was obtained from two models with different fine-sediment treatments: assuming that all of the fine sediments were solid particles or that the particles consisted of a fluid phase involving pore water liquefaction. From the comparison of the friction coefficients, a fully liquefaction state was detected for the fine particle mixture. When the mixing ratio and particle size of the fine sediment were different, some other cases were considered to be in a partially liquefied transition state. These results imply that the liquefaction of fine sediment in debris flows was induced not only by the geometric conditions such as particle sizes, but also by the flow conditions.
KeywordDebris Flow Fine Sediment Friction Coefficient Liquefaction Open Channel Reynolds Stress
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2013_Vol10 No.2
Corresponding AuthorNorifumi HOTTA
Recommended Citation
GB/T 7714
Norifumi HOTTA,Takahiro KANEKO,Tomoyuki IWATA,et al. Influence of Fine Sediment on the Fluidity of Debris Flows[J]. Journal of Mountain Science,2013,10(2):233-238.
APA Norifumi HOTTA,Takahiro KANEKO,Tomoyuki IWATA,&Haruo NISHIMOTO.(2013).Influence of Fine Sediment on the Fluidity of Debris Flows.Journal of Mountain Science,10(2),233-238.
MLA Norifumi HOTTA,et al."Influence of Fine Sediment on the Fluidity of Debris Flows".Journal of Mountain Science 10.2(2013):233-238.
Files in This Item:
File Name/Size DocType Version Access License
Influence of Fine Se(351KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Norifumi HOTTA]'s Articles
[Takahiro KANEKO]'s Articles
[Tomoyuki IWATA]'s Articles
Baidu academic
Similar articles in Baidu academic
[Norifumi HOTTA]'s Articles
[Takahiro KANEKO]'s Articles
[Tomoyuki IWATA]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Norifumi HOTTA]'s Articles
[Takahiro KANEKO]'s Articles
[Tomoyuki IWATA]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Influence of Fine Sediment on the Fluidity of Debris Flows.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.

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