Namelist.fire

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, common to all fuel categories.
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 (kg/kg, between 0.00 and 1.00).
fuelmc_c	Canopy fuel, fuel moisture content (kg/kg, between 0.00 and 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	One number per fuel category.
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 (kg/kg, 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.
fmc_gw01	The proportion of the fuel that is in moisture class 1 (between 0.0 and 1.0)
fmc_gw02	The proportion of the fuel that is in moisture class 2, etc. up to 5. The proportions should add up to 1.
&moisture	The fuel moisture model namelist.
moisture_classes	Number of moisture classes, at most 5. Each fuel consists of a mixture of moisture classes. Following are one number per class.
drying_model	number of the drying model used in each class. At the moment only model 1 is supported. Model parameters follow for each class.
drying_lag	hours it takes to get 64% closer to a equilibrium moisture contents
wetting_model	number of the wetting model used in each class. At the moment only model 1 is supported. Model parameters follow for each class.
wetting_lag	hours of very strong rain it takes to get 64% closer to saturation
saturation_moisture	the maximal fuel moisture contents (in kg/kg, default 2.5)
saturation_rain	rain intensity (mm/h) such that the rate of soaking is at 64% of wetting_lag
rain_treshold	rain under this intensity (mm/h) does not count
fmc_gc_initialization	moisture initialization 0 = from WRF input (files wrfinput or wrfrst), 1 = from scalar fuelmc_g in namelist.input 2 = from equilibrium