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, 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 first fuel category to be ignored and taken as ‘no fuel’ (default: 14) |
no_fuel_cat2 | The last fuel category to be ignored and taken as ‘no fuel’ (default: 14). That is, all fuel with categories between no_fuel_cat and no_fuel_cat2 is ignored. Fuel with category 0 is also always ignored. |
&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 |