Difference between revisions of "Namelist.fire"
Jump to navigation
Jump to search
(making clear moisture is in kg/kg) |
(fixed typesetting in units) |
||
| Line 38: | Line 38: | ||
|- | |- | ||
|fgi | |fgi | ||
| − | |The initial mass loading of surface fuel (kg m-2) in each fuel category | + | |The initial mass loading of surface fuel (kg m<sup>-2</sup>) in each fuel category |
|- | |- | ||
|fueldepthm | |fueldepthm | ||
| Line 47: | Line 47: | ||
|- | |- | ||
|fuelmce | |fuelmce | ||
| − | | Fuel moisture content of extinction ( | + | | Fuel moisture content of extinction (kg/kg, from 0.00 – 1.00). |
|- | |- | ||
|fueldens | |fueldens | ||
| − | |Fuel particle density lb ft-3 (32 if solid, 19 if rotten) | + | |Fuel particle density lb ft<sup>-3</sup> (32 if solid, 19 if rotten) |
|- | |- | ||
|st | |st | ||
| Line 62: | Line 62: | ||
|- | |- | ||
|fci_d | |fci_d | ||
| − | |Initial dry mass loading of canopy fuel (in kg m-2) | + | |Initial dry mass loading of canopy fuel (in kg m<sup>-2</sup>) |
|- | |- | ||
|fct | |fct | ||
Revision as of 06:05, 22 June 2012
- 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 moisture model namelist. |
| moisture_classes | Number of moisture classes, at most 5. Each fuel consists of a mixture of moisture classes. |
| drying_model | number of the drying model used in each class. At the moment only model 1 is supported. Model parameters follow. |
| 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. |
| 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 its maximum |
| rain_treshold | rain under this intensity (mm/h) does not count |