Figure 5

Four types of fire behavior simulation. Panel (a) shows an IFT-FlamMap basic run where each pixel within an area of interest is simulated to burn as a head fire with a single fuel moisture and wind profile. Mapped here is flame length output under dry moisture conditions. Flame length categories are preset by the user and are typically expressed in feet; in this example, green indicates low flame lengths (0 m to 1.2 m; 0 ft to 4 ft), yellow indicates medium flame lengths (1.2 m to 2.4 m; 4 ft to 8 ft), orange indicates high flame lengths (2.4 m to 3.4 m; 8 ft to 11 ft), and red indicates very high flame lengths (>3.4 m; >11 ft). Panel (b) shows IFT-RANDIG burn probability output that provides indices of the likelihood of burning throughout the area given a random ignition. Burn probabilities in this example range from low (1 % to 5 %; dark blue) to high (55 % to 60 %; yellow). Panel (c) shows time for fire to arrive and pre-treatment potential fire paths across an area of interest, and panel (d) shows the influence of fuels treatment (brightly colored fuel break polygons) on restricting fire movement across the same landscape. The simulations in panel (c) and (d) were conducted using the same environmental conditions; the only change is the addition of the fuels treatments to the simulation.