Rothermel's model describes fire as free burning.

• A. True
• B. False
• C. Sometimes
• D. Never

Answer: (A)

Rothermel's model is a semi-empirical, steady-state description of a surface fire spreading through a uniform fuel bed. It treats the flame front as self-sustaining: heat released by the burning fuel preheats and ignites the unburned fuel ahead, allowing the front to advance at a rate of spread set by fuel characteristics, wind, slope, and moisture. Because the model describes this self-propagating, unimpeded progression under the given local conditions, it characterizes the fire as free-burning. It’s an idealized framework that assumes no external confinement or suppression changing the front’s behavior, so the statement is true.