NWCG Introduction to Wildland Fire Behavior Calculations (S-390) Practice Test

Fuel models are built from properties that describe the fuel itself, not the surrounding weather. They rely on how much fuel is present and how it behaves when heat is applied. The key inputs are fuel loading (how much fuel there is per area), fuel moisture content (how wet or dry the fuel is, which affects ignition and burn rate), and bulk density (how densely packed the fuel bed is, influencing heat transfer and consumption).

Wind speed, while crucial for overall fire behavior, is an environmental condition used in the broader fire behavior calculations rather than a property of the fuel model. It affects how quickly a fire spreads and how intense it becomes, but it isn’t a characteristic used to define the fuel model itself.