Fireline Intensity

Fireline intensity is the heat energy released per unit time from a one-foot-wide (or one-meter-wide) section of the fuel bed extending from the front to the rear of the flaming zone. Fireline intensity is a function of rate of spread and heat per unit area, and is directly related to flame length.

In IFTDSS this is expressed in BTU/foot/second in the Map Studio and reports, in the download it is in kilowatt/meter.

illustration with a dashed line highlighting 1 meter wide section running the length of the active flaming zone.

IFTDSS Map Studio session with a Fireline intensity layer turned on.