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Resistance coefficient

  • Feb 21 2022
  • molinaripaol89

Good evening.

Having to simulate a debris flow, which criteria must be considered to best set the resistance coefficient (default = 72)? What is the range of values ​​it can take in a real cases? I have read the information provided in the manual and in the article “Numerical Simulation of a Debris Flow on the Basis of a Two-Dimensional Continuum Body Model” (Hiroshi Takebayashi, Masaharu Fujita), but I don’t understand if it is possible to determine a resistance coefficient based e.g. on physical characteristics of the soil, roughness of the running surface and more.

Thanks in advance for your kindly reply.


  1. hiroshi.takebayashi says:

    Thank you for using Morpho2DH.
    At present, we determine its value empirically. In most cases we use the default values 72. When changing the value, the value is varied in the range of 30 to 90. We need more research on the resistance coefficient.


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