Using the analysis start date, WFDSS retrieves the previous days (number determined by FBS on General Information page) of RAWS data, as well as National Weather Service (NWS) Forecast Data to complete fuel moisture conditioning (of dead fuels) for each cell of the landscape extent. WFDSS Basic Fire Behavior (BFB) uses the dead fuel moistures calculated by the analysis start date and time and the forecasted wind information to provide fire behavior outputs for one instant in time for the entire landscape extent. BFB provides many of the same fire behavior outputs as BEHAVE (and BehavePlus). Below are the outputs currently available in WFDSS BFB and their units:
Output |
Display Units |
meters or feet |
|
Rate of Spread |
meters per meter (m/min) or chains per hour (ch/hr) or miles per hour (mi/hr) |
Fireline Intensity |
kilowatts per minute (kw/m) or BTUs per foot-second (BTU/ft-sec) |
kilojoules per meter squared (kJ/m2 ) |
|
No Fire, Surface Fire, Passive Crown, Active Crown |
|
Maximum Spread Direction |
degrees |
Wind Direction |
degrees |
Wind Speed |
miles per hour (mi/hr) |
Hauling Chart |
meters or feet |
WFDSS Automated BFB also calculates the following environmental outputs:
Output |
Display Units |
1 hour fuel moisture |
percentage (e.g., 0.06 = 6%) |
10 hour fuel moisture |
percentage (e.g., 0.18 = 18%) |
Solar radiation |
watts per meter squared (W/m2 ) |
Because it is geospatial, WFDSS BFB calculates and maps the outputs for every cell on a landscape for an instant in time. In WFDSS BFB, the user can change the units for some outputs and ACCEPT/REJECT the outputs.
The ACCEPT / REJECT button is located at VIEW RESULTS / RESULTS for each analysis.
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Last updated on 12/30/2021 3:49:06 PM.
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