Surface Fire Size and Shape
Surface Fire Section
- Surface Fire Shape
- Surface Fire Area Estimation from Point Source Fire, in Acres
- Surface Fire Perimeter Estimation from Point Source Fire, in Chains
These tools are intended for use with initiating fires only. Use the known ignition time and the number of hours after that you are interested in. Consider using:
- Number of hours from ignition until the end of the expected burn period.
- Number of hours until you arrive at the fire.
Surface Fire Shape
Remember that effective windspeed, as referenced here, is based on midflame windspeed.
Length to Width Ratio in parenthesis
Surface Fire Area Estimation from Point Source Fire, in Acres
Table 1, Spread Distance 1–50 Chains
Table 2, Spread Distance 52–165 Chains
Surface Fire Perimeter Estimation from Point Source Fire, in Chains
Table 3, Spread Distance 1–50 Chains
Table 4, Spread Distance 52–165 Chains
PRINT FBFRG Surface Fire Size and Shape
Page Last Modified / Reviewed:
2021-07-07