Bushfire Attack Level (BAL) - Method 2

Calculate the Bushfire Attack Level (BAL) in accordance with AS 3959-2009 and AS 3959-2018 Appedix B - Method 2.

Fire danger index (FDI)

Effective slope - upslope or level/ upslope

Effective slope degrees

Site slope degrees

Distance m

Advanced Options

Wind speed km/h

Heat of combustion kj/kg

Flame width m

Flame emissivity

Flame temperature K

Ambient temperature ^oC

Relative humidity %

Fuel moisture

Fuel age years

Bushfire Attack Level (BAL) - Method 2 Calculator

Inputs		Outputs
Fire danger index (FDI)		Rate of spread
Vegetation classification		Flame length
Surface fuel load		Fire intensity
Overall fuel load		Flame angle
Effective slope		Elevation of reciever
Site slope		Emissive power
Distance to vegetation		View factor
Flame width		Atmospheric transmissivity
Flame temperature		Radiant heat flux
Heat of combustion		Bushfire attack level
Flame emissivity
Wind speed
Ambient temperature
Relative humitity
Fuel moisture factor
Fuel age