Heat Values for Some Fire Behavior Fuel Models
The following table presents values of heat per unit area for some of the original 13 fire behavior fuel models (Rothermel, 1991).
| Fuel Model | Additional 1000-h fuel tons/acre | Heat per Unit Area | |
|---|---|---|---|
| Btu/ft2 | kJ/m2 | ||
| FM 8 - Closed timber litter | 580 | 6,592 | |
| FM 2 - Timber (grass and understory) | 760 | 8,638 | |
| FM 9 - Hardwood litter | 1,050 | 11,934 | |
| FM 9 - Hardwood litter | 30 | 1,325 | 15,059 |
| FM 10 - Timber (litter and understory) | 1,325 | 15,059 | |
| FM 10 - Timber (litter and understory) | 30 | 1,570 | 17844 |
| FM 12 - Medium logging slash | 3430 | 38,983 | |