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Learning to Use FOFEM 5 Volume II: Advanced Lesson

Learning to Use FOFEM 5 Volume II: Advanced Lesson. Missoula Fire Sciences Laboratory Systems for Environmental Management. In the Advanced Lesson. Advanced use of soil heating and Burnup modules Batch mode: making many runs at once Linking FOFEM 5 to GIS.

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Learning to Use FOFEM 5 Volume II: Advanced Lesson

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  1. Learning to Use FOFEM 5Volume II: Advanced Lesson Missoula Fire Sciences Laboratory Systems for Environmental Management Learning to Use FOFEM 5: Advanced Lesson

  2. In the Advanced Lesson • Advanced use of soil heating and Burnup modules • Batch mode: making many runs at once • Linking FOFEM 5 to GIS Learning to Use FOFEM 5: Advanced Lesson

  3. Running Fuel Consumption from a file • For use in the FOFEM 5 graphical interface, many Burnup input parameters were set as constants • Running Burnup from a file allows full control of the model • Select Options | create sample Burnup input file to create a template • Edit the sample file to reflect your data and simulation parameters Learning to Use FOFEM 5: Advanced Lesson

  4. Running Fuel Consumption from a file IG_TIMEResidence time of the igniting surface fire (seconds) DEPTHfuelbed depth (meters) WINDSPEEDWind speed at the top of the fuel bed (m/sec) AMBIENT_TEMPair temperature (deg C) MAX_TIMESThe maximum number of iterations BURNUP will compute INTENSITY Reaction intensity of the igniting surface fire (kW/m2) DUFF_LOADduff loading (kg/m2) r0fire environment minimum dimension parameter drfire environment increment temperature parameter TIMESTEPtime step for integration of burning rates DUFF_MOISTduff moisture content (fraction dry weight) Learning to Use FOFEM 5: Advanced Lesson

  5. Running Fuel Consumption from a file Tabular data: fuel components Column 1must contain a “1” Column 2index label Column 3dry load (kg/m2) Column 4heat content (J/kg) Column 5moisture content (fraction dry weight basis) Column 6oven-dry mass density (kg/m3) Column 7surface area to volume ratio (1/m) Column 8heat capacity (J/kg-K) Column 9thermal conductivity (W/m-K) Column 10ignition temperature (C) Column 11char temperature (C) Column 12mineral ash fraction Learning to Use FOFEM 5: Advanced Lesson

  6. BURNUP output file Running Fuel Consumption from a file • Select Options | Run Burnup from input file, then select the edited input file to make the run. Learning to Use FOFEM 5: Advanced Lesson

  7. Running BURNUP from a file also creates an emissions output file. Running Fuel Consumption from a file Learning to Use FOFEM 5: Advanced Lesson

  8. WARNING: running soil heating model from a file allows full control of variables with high sensitivity. Users should become fluent with basic use of the model before running it from a file. Running Soil Heating from a file • For use in the FOFEM 5 graphical interface, many soil heating input parameters were set as constants • Running soil heating from a file allows full control of the model • Select Options | create sample soil input files to create a template file • Edit the file to reflect your data and simulation parameters Learning to Use FOFEM 5: Advanced Lesson

  9. Running Soil Heating from a file • Two options • Duff present, soil is insulated • Duff absent, soil is exposed Learning to Use FOFEM 5: Advanced Lesson

  10. Keywords Arguments Comments Layers section Running Soil Heating from a file • Duff is present: Learning to Use FOFEM 5: Advanced Lesson

  11. Running Soil Heating from a file • Duff is absent Same sections: Keywords Arguments Comments Layers Learning to Use FOFEM 5: Advanced Lesson

  12. Running Soil Heating from a file • Select Options | Run soil from input file, then select the edited input file to make the run. • Output is displayed in report or graphical form • Use Options | Save soil temp points file to save data for use in other programs • Help file has details. Learning to Use FOFEM 5: Advanced Lesson

  13. FOFEM 5 batch mode • Some users need to make hundreds or even thousands of FOFEM runs • E.g., to simulate potential fire effects across a landscape or under a range of fuel moisture conditions • A batch mode of FOFEM 5 is under development • Check the website for updates if you need this feature Learning to Use FOFEM 5: Advanced Lesson

  14. A GIS analyst can simulate the spatial distribution of fire effects by linking FOFEM 5 to a GIS The landscape is first divided into homogeneous units, then model inputs are set for each unit. Then the analyst simulates fire effects using a FOFEM batch run Finally, the FOFEM batch run output attributes are linked back to the original units, allowing the spatial display of effects such as probability of tree mortality, smoke production, fuel consumption, etc. Linking FOFEM 5 to a GIS Learning to Use FOFEM 5: Advanced Lesson

  15. Advanced Lesson: Conclusion • The soil heating and Burnup fuel consumption models can be run from a file, allowing greater control of model input parameters. • FOFEM 5 can be used in batch mode for analysis in a statistical program or for use in a GIS; check fire.org for availability of this feature. Learning to Use FOFEM 5: Advanced Lesson

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