Crown fraction burned

n. A mathematical function for scaling rate of spread between that of a surface fire and that of an active crown fire.


  • Discussion


The concept of using a mathematical function to scale rate of spread between predictions for surface fire and active crown fire was developed by Van Wagner (1993). This crown fraction burned concept is used in the Canadian Forest Fire Behavior Prediction System, and the fire behavior models FARSITE, FlamMap, and NEXUS. Crown fraction burned is a dimensionless number between 0 and 1.


  • See Also

    • Active crown fire

    • Crown fire

    • Rate of spread

    • Surface fire


  • References

    • Van Wagner, C.E. 1993. Prediction of crown fire behavior in two stands of Jack pine. Canadian Journal of Forest Research. 23: 442-449.


  • Notes

    • Author 

      Joe Scott, Research Forester

      Systems for Environmental Management