Difference between revisions of "Namelist.fire"

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({{users guide}})
 
(14 intermediate revisions by 2 users not shown)
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! Description
 
! Description
 
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|-
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|&fuel_scalars
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|'''&fuel_scalars'''
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| Scalar fuel constants
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| Scalar fuel constants, common to all fuel categories.
 
|-
 
|-
 
|cmbcnst
 
|cmbcnst
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|-
 
|-
 
|fuelmc_g
 
|fuelmc_g
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|Surface fuel, fuel moisture content (in percent expressed in decimal form, from 0.00 – 1.00).
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|Surface fuel, fuel moisture content (kg/kg, between 0.00 and 1.00).
 
|-
 
|-
 
|fuelmc_c
 
|fuelmc_c
−
|Canopy fuel, fuel moisture content (in percent expressed in decimal form, from 0.00 – 1.00).
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|Canopy fuel, fuel moisture content (kg/kg, between 0.00 and 1.00).
 
|-
 
|-
 
|nfuelcats
 
|nfuelcats
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|-
 
|-
 
|no_fuel_cat
 
|no_fuel_cat
−
| The number of the dummy fuel category specified to be used where there is ‘no fuel’
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| The first fuel category to be ignored and taken as ‘no fuel’ (default: 14)
 
|-
 
|-
−
|&fuel_categories
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|no_fuel_cat2
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| Domain specifications
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| 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'''
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| One number per fuel category.
 
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|-
 
|windrf
 
|windrf
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|-
 
|-
 
|fgi
 
|fgi
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|The initial mass loading of surface fuel (kg m-2) in each fuel category
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|The initial mass loading of surface fuel (kg m<sup>-2</sup>) in each fuel category
 
|-
 
|-
 
|fueldepthm
 
|fueldepthm
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|-
 
|-
 
|savr
 
|savr
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| Fuel Surface-area-to-volume-ratio (m-1)
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| Fuel Surface-area-to-volume-ratio (ft-1)
 
|-
 
|-
 
|fuelmce
 
|fuelmce
−
| Fuel moisture content of extinction (in percent expressed in decimal form, from 0.00 – 1.00).
+
| Fuel moisture content of extinction (kg/kg, from 0.00 – 1.00).
 
|-
 
|-
 
|fueldens
 
|fueldens
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|Fuel particle density lb ft-3 (32 if solid, 19 if rotten)
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|Fuel particle density lb ft<sup>-3</sup> (32 if solid, 19 if rotten)
 
|-
 
|-
 
|st
 
|st
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|-
 
|-
 
|fci_d
 
|fci_d
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|Initial dry mass loading of canopy fuel (in kg m-2)
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|Initial dry mass loading of canopy fuel (in kg m<sup>-2</sup>)
 
|-
 
|-
 
|fct
 
|fct
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|-
 
|-
 
|ichap
 
|ichap
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| Is this a chaparral category to be treated differently using an empirical rate of spread relationship that depends only on windspeed?
+
| Is this a chaparral category to be treated differently using an empirical rate of spread relationship that depends only on windspeed
 
|-
 
|-
 
|
 
|
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|Primarily used for Fuel Category 4.
 
|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.
 +
|-
 +
| is_dead
 +
|      Fuel moisture class is dead or live (1 if is dead and 0 if is live)
 +
|-
 +
| 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
 
|}
 
|}
  
 
[[Category:WRF-Fire]]
 
[[Category:WRF-Fire]]

Latest revision as of 22:30, 24 August 2023

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 (ft-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.
is_dead Fuel moisture class is dead or live (1 if is dead and 0 if is live)
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
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