Show simple item record

dc.contributor.authorNguyen, Ba-Quang-Vinh
dc.contributor.authorLee, Ji-Sung
dc.contributor.authorKim, Yun-Tae
dc.contributor.authorLee, Seung-Rae
dc.contributor.authorKwon, Tae-Hyuk
dc.date.accessioned2019-08-21T15:22:08Z
dc.date.accessioned2022-02-02T14:38:46Z
dc.date.available2019-08-21T15:22:08Z
dc.date.available2022-02-02T14:38:46Z
dc.date.issued2019
dc.identifier.urihttps://hdl.handle.net/11124/173194
dc.identifier.urihttp://dx.doi.org/10.25676/11124/173194
dc.description.abstractDebris flows are one of the most serious hazards in the mountainous areas. To assess and mitigate the debris-flow hazard, debris- flow intensities and deposition on fans must be estimated. Rheological properties including yield stress and viscosity are major parameters to describe and predict behaviors of debris flow. In the present study, the effect of rheological properties on debris-flow intensities and deposition on fans of natural clay was investigated using large scale flume experiments. The experimental device employed in the tests consists of a tilting flume with an inclination 17°, on which a steel tank with a removable gate was installed. A final horizontal plane works as the deposition area. Natural soil samples of different water contents were tested. Rheological properties of soil mixtures were obtained from vane-rheometer tests. Non-linear regression analysis was used to assess the effect of yield stress and viscosity on debris-flow velocity, runout distance, deposited area and deposited volume. We found that the relationship between surface velocity profile and horizontal distance was complicated and could be expressed by sixth order polynomial function. Mean velocity, runout distance, deposited area decreased following a power law with an increase in yield stress and viscosity. Empirical equations were proposed to estimate these properties. The results of laboratory tests compared reasonably well with the results from numerical analysis. The results indicated that yield stress and viscosity play a significant role in the behavior of debris flow.
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 intensities
dc.subjectdebris-flow deposition
dc.subjectflume test
dc.subjectrheological properties
dc.titleEffect of rheological properties on debris-flow intensity and deposition in large scale flume experiment
dc.typeText
dc.publisher.originalAssociation of Environmental and Engineering Geologists


Files in this item

Thumbnail
Name:
03-21_Nguyen.pdf
Size:
1.150Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record