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Acta Mechanica

, Volume 63, Issue 1–4, pp 161–178 | Cite as

Large debris flows: A macro-viscous phenomenon

  • T. R. H. Davies
Contributed Papers

Summary

Field observations from a variety of sources suggest that destructive debris flows occur when the density of the fluid-solid mixture exceeds about 1.5 T/m3, and that their destructive ability is due to their pulsing nature and to their ability to carry large boulders.

If debris flows are treated as a macroviscous flow of large stones in a slurry of fine solids in water, several of their obvious characteristics (boulder transport, deep bed erosion, intermittent jamming) can be explained. Further, the amplification and translation in a main channel of random surges due to jamming in tributaries explains the regular, large pulses in Chinese debris flows as a roll-wave phenomenon.

Keywords

Fluid Dynamics Debris Flow Boulder Field Observation Transport Phenomenon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • T. R. H. Davies
    • 1
  1. 1.Department of Agricultural Engineering, Lincoln CollegeUniversity of CanterburyChristchurchNew Zealand

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