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Journal of Mountain Science

, Volume 11, Issue 5, pp 1242–1252 | Cite as

Characteristics of a drainage channel with staggered indented sills for controlling debris flows

  • Xiao-qing ChenEmail author
  • Yong You
  • Jian-gang Chen
  • Kai Huang
  • De-ji Li
Article

Abstract

The characteristics of a new type of drainage channel with staggered indented sills for controlling debris flows were studied. The intermediate fluid in the non-viscous debris flow exhibited a helical movement, whereas the fluid near the sidewall had a stop-start movement pattern; the viscous debris flow exhibited a stable structure between the indented sills. The experimental results indicate that the mean velocity of the debris flow increased with increasing channel gradients, and the debris flow velocity was slightly affected by the angle of the sills. The average velocity of the non-viscous debris flow increased in the range of (0.5–1.5) interval between the indented sills, whereas the average velocity of the viscous debris flow increased initially and then decreased in the range of (0.75–1.25) interval between the indented sills. The depth of the non-viscous debris flow tended to gradually increase as the channel gradients increased, whereas the depth of the viscous debris flow gradually decreased as the channel gradients increased. When the discharge of the debris flow was constant, the angle and the interval between the indented sills had a slight effect on the depth of the viscous debris flow, whereas the depth of the non-viscous debris flow exhibited a different trend, as the sill angles and intervals were varied.

Keywords

Debris flow Drainage channel Staggered indented sill Wenchuan earthquake 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Xiao-qing Chen
    • 1
    • 2
    Email author
  • Yong You
    • 1
    • 2
  • Jian-gang Chen
    • 1
    • 2
  • Kai Huang
    • 1
    • 2
  • De-ji Li
    • 1
    • 2
  1. 1.Key Laboratory of Mountain Hazards and Earth Surface ProcessesChinese Academy of SciencesChengduChina
  2. 2.Institute of Mountain Hazards and EnvironmentChinese Academy of Sciences and Ministry of Water ConservancyChengduChina

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