UCSB 20 |
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Model Name: |
"Wildland Urban Interface" |
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Fuel Model Number: |
20 |
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Source: |
UCSB Custom Model |
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Reference: |
unpublished |
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Description: |
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This model corresponds to stands where the cover was identified from Franklin, 1997 as consisting of: |
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• rural residential or urban in 1990 SCAG (Southern California Association of Governments) Land Use |
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This fuel model is meant to mimic the exotic landscape vegetation commonly surrounding homes in the Santa Monica Mountains. The grass component of the wildland urban interface fuels is represented by values of D1H and DSAV taken from NFFL 1. The exotic landscaped vegetation component of the wildland urban interface fuels is represented by values of D10H, D100H, LH, LW, LHSAV, and LWSAV taken from NFFL 7. The fuel bed depth is the numerical average of NFFL 1 and NFFL 7. |
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FuelModelNum |
D1H |
D10H |
D100H |
LH |
LW |
DSAV |
LHSAV |
LWSAV |
FuelBedDepth |
MoistOfExtinct |
DHC |
LHC |
IsNFFL |
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20 |
1.66 |
4.19 |
3.36 |
0.00 |
0.83 |
105.98 |
0.00 |
46.934 |
53.34 |
40 |
18608 |
18608 |
No |
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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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7 |
2.53 |
4.19 |
3.36 |
0.00 |
0.83 |
52.99 |
0.00 |
46.934 |
76.2 |
40 |
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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