The 40 Scott and Burgan Fire Behavior Fuel Model (FBFM40) layer represents distinct distributions of fuel loading found among surface fuel components (live and dead), size classes, and fuel types.
This set contains more fuel models in every fuel type (grass, shrub, timber, slash) than Anderson's set of 13. The number of fuel models representing relatively high dead fuel moisture content increased, and fuel models with an herbaceous component are now dynamic, meaning that loads shift between live and dead (to simulate curing of the herbaceous component) rather than remaining constant.
FBFM40 was produced through a series of workshops held across the nation with fire and fuels specialists to determine surface fuel model rule sets using unique combinations of existing vegetation type, cover, and height. The resultant spatial arrangement of surface fuel models are known as the calibrated FBFM40 layer.
The FBFM40 layer can serve as input to wildland fire prediction models.
Modeling Dynamic Fuels with an Index System (MoD-FIS) - refined EVH classification based upon current estimates of EVC from Landsat imagery for the current growing season.