Namelist.fire

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Back to the WRF-SFIRE user guide.


This file serves to redefine the fuel categories if the user wishes to alter default fuel properties.

Variable name Description
&fuel_scalars Scalar fuel constants
cmbcnst The energy released per unit fuel burned for cellulosic fuels (constant, 1.7433e7 J kg-1).
hfgl The threshold heat flux from a surface fire at which point a canopy fire is ignited above (in W m-2).
fuelmc_g Surface fuel, fuel moisture content (in percent expressed in decimal form, from 0.00 – 1.00).
fuelmc_c Canopy fuel, fuel moisture content (in percent expressed in decimal form, from 0.00 – 1.00).
nfuelcats Number of fuel categories defined (default: 13)
no_fuel_cat The number of the dummy fuel category specified to be used where there is ‘no fuel’
&fuel_categories Domain specifications
windrf Wind reduction factor from 20ft to midflame height (1)
fgi The initial mass loading of surface fuel (kg m-2) in each fuel category
fueldepthm Fuel depth (m)
savr Fuel Surface-area-to-volume-ratio (m-1)
fuelmce Fuel moisture content of extinction (in percent expressed in decimal form, from 0.00 – 1.00).
fueldens Fuel particle density lb ft-3 (32 if solid, 19 if rotten)
st Fuel particle total mineral content. (kg minerals/kg wood)
se Fuel particle effective mineral content. (kg minerals – kg silica)/kg wood
weight Weighting parameter that determines the slope of the mass loss curve. This can range from about 5 (fast burnup) to 1000 ( 40% decrease in mass over 10 minutes).
fci_d Initial dry mass loading of canopy fuel (in kg m-2)
fct The burnout time of canopy fuel once ignited (s)
ichap Is this a chaparral category to be treated differently using an empirical rate of spread relationship that depends only on windspeed?
1: yes, this is a chaparral category and should be treated differently
0: no, this is not a chaparral category or should not be treated differently.
Primarily used for Fuel Category 4.