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dc.contributor.authorMiyamoto, Kuniaki
dc.contributor.authorItoh, Takahiro
dc.contributor.authorKisa, Hiroshi
dc.date.accessioned2019-08-27T20:47:54Z
dc.date.accessioned2022-02-02T14:39:05Z
dc.date.available2019-08-27T20:47:54Z
dc.date.available2022-02-02T14:39:05Z
dc.date.issued2019
dc.identifier.urihttps://hdl.handle.net/11124/173238
dc.identifier.urihttp://dx.doi.org/10.25676/11124/173238
dc.description.abstractThe change in sediment concentration of debris flow causes erosion and sedimentation of the solid phase of debris flows. Moreover, the changing affects the mobility of the flow. Therefore, knowledge of the mechanism of the changing is important to understand the mechanism of debris flow. The changing can be considered as compressibility of the flow of the solid phase. We developed a constitutive equation set of debris flow by concerning energy dissipation. A part of the energy dissipation is due to inelastic collision of particles. This process must be compressible. Therefore, we reinvestigate the process of the inelastic collisions and the effect to the compressibility. As the result, we lead internal energy to control the compressibility and so-called erosion rate equation. According to the erosion rate equation, it depends on bed gradient and energy loss gradient. A flume test is conducted to evaluate the erosion rate equation. by using a prismatic steep slope channel, which inclination is set at 12 degrees. By comparison of experimental result with the erosion rate equation, it is found that the difference between energy gradient and bed gradient to control the erosion/deposition is not so large. It means that the erosion/deposition might be very much sensitive against the unbalance of the energy gradient and bed gradient.
dc.format.mediumborn digital
dc.format.mediumproceedings (reports)
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartofSeventh International Conference on Debris-Flow Hazards Mitigation - Proceedings
dc.relation.ispartofAssociation of Environmental and Engineering Geologists; special publication 28
dc.rightsCopyright of the original work is retained by the authors.
dc.sourceContained in: Proceedings of the Seventh International Conference on Debris-Flow Hazards Mitigation, Golden, Colorado, USA, June 10-13, 2019, https://hdl.handle.net/11124/173051
dc.subjectdebris flow
dc.subjecteroson rate
dc.subjectcompressibility
dc.subjectflume tests
dc.titleCompressibility of solid phase of debris flow and erosion rate
dc.typeText
dc.publisher.originalAssociation of Environmental and Engineering Geologists


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