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Journal of Mountain Science

, Volume 6, Issue 1, pp 88–95 | Cite as

Gravel accumulation in deposits of viscous debris flows with hyper-concentration

  • Yuyi WangEmail author
  • Rongzhi Tan
  • Chyandeng Jan
  • Bing Tian
Article

Abstract

According to the observational data of viscous debris flows with hyper-concentration, debris flows can be classified into three types: high-viscous, viscous, and sub-viscous debris flows. Distinct formation mechanism of different graded bedding structures in deposits of viscous debris flows was analyzed in this paper by using their yield-stress ratio and flow plug ratio. This paper specially analyzed the effect of Weissenberg which the gravels in squirm condition of hyper-concentration viscous flows would tend to move vertically, and the formation mechanism of the gravels accumulated at surface was also studied. The analysis in this paper can establish a foundation for the studies on differentiation of bedding structures of debris flow deposits and studies on dynamic parameters of debris flows.

Keywords

Viscous debris flow effective yield-stress ratio flow plug ratio effect of Weissenberg gravel accumulation at surface 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Yuyi Wang
    • 1
    • 2
    Email author
  • Rongzhi Tan
    • 1
    • 2
  • Chyandeng Jan
    • 3
  • Bing Tian
    • 1
    • 2
    • 4
  1. 1.Key Laboratory of Mountain Hazards & Earth Surface ProcessChinese Academy of SciencesBeijingChina
  2. 2.Institute of Mountain Hazards & EnvironmentChinese Academy of SciencesChengduChina
  3. 3.Department of Hydraulics & Ocean EngineeringChengKung UniversityTainanTaiwan, China
  4. 4.College of Resources & Environment ScienceHebei Normal UniversityShijiazhuangChina

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