NFFL 1 |
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Model Name: |
"Short Grass" |
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Fuel Model Number: |
1 |
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Source: |
NFFL Standard Model |
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Reference: |
Anderson, 1982 |
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Description: |
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This model corresponds to stands where the Potential Natural Vegetation (PNV) and cover was identified from Franklin, 1997 as consisting of: |
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• dominated by exotic annual grasses |
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• Valley Oak (Quercus lobata) savanna |
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• open Walnut (Juglans californica) woodlands |
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• coastal cactus scrub consisting of Prickly Pear (Opuntia oricola) and exotic annual grasses |
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• dominated by northern mixed chaparral AND less than or equal to 2 years maturity |
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• > 80% cover of Chamise (Adenostoma fasciculatum) AND less than or equal to 2 years maturity |
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• dominated by Redshank (Adenostoma sparsifolium) chaparral AND less than or equal to 2 years maturity |
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• dominated by coastal sage scrub AND less than or equal to 3 years maturity |
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• dominated by a mixed coastal sage scrub and northern mixed chaparral community AND less than or equal to 2 years maturity |
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This model is the quintessential grass fuel encountered in areas that have experienced significant disturbance due to construction of fire roads or grazing. It also serves as a generic early postfire sucessional fuel model for various chaparral and coastal sage scrub cover types. |
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FuelModelNum |
D1H |
D10H |
D100H |
LH |
LW |
DSAV |
LHSAV |
LWSAV |
FuelBedDepth |
MoistOfExtinct |
DHC |
LHC |
IsNFFL |
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1 |
1.66 |
0.00 |
0.00 |
0.00 |
0.00 |
105.98 |
0.00 |
0.00 |
30.48 |
12 |
18608 |
18608 |
Yes |
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FuelModelNum |
MODEL NUMBER IN COVERAGE - NFFL MODEL NUMBERS ARE STANDARDIZED |
- |
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D1H |
ACCUMULATED DEAD 1 HOUR FUELS |
Mg/ha |
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D10H |
ACCUMULATED DEAD 10 HOUR FUELS |
Mg/ha |
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D100H |
ACCUMULATED DEAD 100 HOUR FUELS |
Mg/ha |
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LH |
ACCUMULATED LIVE HERBACEOUS FUELS |
Mg/ha |
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LW |
ACCUMULATED LIVE WOODY FUELS |
Mg/ha |
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DSAV |
DEAD FUELS "CHARACTERISTIC" SURFACE AREA TO VOLUME RATIO |
cm2/cm3 |
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LHSAV |
LIVE HERBACEOUS FUELS "CHARACTERISTIC" SURFACE AREA TO VOLUME RATIO |
cm2/cm3 |
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LWSAV |
LIVE WOODY FUELS "CHARACTERISTIC" SURFACE AREA TO VOLUME RATIO |
cm2/cm3 |
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FuelBedDepth |
FUEL BED DEPTH (70% of Average Stand Height) |
cm |
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MoistOfExtinct |
MOISTURE OF EXTINCTION OF DEAD FUELS |
% |
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DHC |
DEAD FUELS HEAT CONTENT |
kJ/kg |
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LHC |
LIVE FUELS HEAT CONTENT |
kJ/kg |
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IsNFFL |
IS THIS A STANDARD NFFL FUEL MODEL OR CUSTOM MODEL DEVELOPED FROM BEHAVE |
- |
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Chaparral Environmental Regimes Used In Fire Spread Predictions
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Property |
ModerateConditions |
ExtremeConditions |
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Dead 1 Hour Fuel Moisture |
0.08 |
0.02 |
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Dead 10 Hour Fuel Moisture |
0.09 |
0.04 |
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Dead 100 Hour Fuel Moisture |
0.11 |
0.05 |
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Live Herbaceous Fuel Moisture |
1.50 |
0.90 |
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Live Woody Fuel Moisture |
1.10 |
0.70 |
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Source: |
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Notes: |
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Fuel Moisture content values are given on a dry weight basis. |
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Wind magnitude (speed) was varied from 0 m/s to 10 m/s. Magnitudes in the upper range are meant to mimic Santa Ana conditions. |
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Slope was varied from 0% to 100%. At 100% slope there is a 1 meter change in vertical elevation for every 1 meter of horizontal distance. |
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Wind magnitude (speed) in slope trials was set to 0 m/s. |
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