Landscape Burn Probability (LBP) Tutorial

Below you will find step by step instructions for running the LBP model.

IFTDSS can process a limited number of LBP runs at a time. You can check your run queue position in the Playground.

Select the model

Navigate to the Landscape Burn Probability inputs page either:

  • From the Cycle, by clicking on the Strategic Planning stage, and then the Model Burn Probability task,

    strategic planning stage of the cycle with the Landscape Burn Probability option in the bottom left

  • Or from the Modeling Playground, selecting Landscape Burn Probability from the drop-down menu and click Create Run.

    Landscape Burn Probability visible in the dropdown menu

Choose or Create a Landscape

Choose a landscape for your run from the drop-down list. You also have the option of creating a new landscape using the Create Here button.

use the drop down to pick your landscape to model

Populate the Model Parameters and Run

  1. Select a wind option, specify windspeed, in miles per hour at 20 feet above the ground or above the vegetation, and enter wind direction as the direction the wind is blowing from (in degrees clockwise from north, with north being 0 or 360 degrees).
  2. Specify a crown fire calculation method, and the foliar moisture content (in percent).
  3. Specify fuel moisture, in percent, for:
    • 1 hour fuels (1hr FM) - allowed values 2-40
    • 10 hour fuels (10hr FM) - allowed values 2-40
    • 100 hour fuels (100hr FM) - allowed values 2-40
    • Herbaceous fuels (Herb FM) - allowed values 30-300
    • Live Woody fuels (WoodyFM) - allowed values 60-300
    • If you would like to specify fuel moisture by fuel model, you may do so by adding rows, click + add row. This will add a new line. Using the drop down list, choose a fuel model, then specify the fuel moisture values. You may repeat this as many times as needed.
    If you choose to only populate one row, those fuel moistures will be applied to all fuel models in your landscape. For more guidance on choosing fuel moistures see Estimating Fuel Moistures.

    dropdown boxes will contain fields for wind, crown fire, and fuel moisture inputs

  4. Select a Fuel Moisture Conditioning method. If you choose not to condition, your Initial Fuel Moistures from the previous step will be used throughout the landscape. If you choose to condition your fuels to account for landscape features and weather, use one of the two conditioning options below: 

    To condition using a Classified (automatically generated) Weather Stream:

    1. Click the Condition (Select Classified Weather Stream) button. The system will take a moment to search for available weather streams.
    2. Use the Pick Weather Stream drop-down menu to pick an automatically generated weather stream. See Classified Weather Stream for more information on how these are generated.

      the 'extreme' weather file shown in a dropdown menu.

      Currently only the "Extreme" weather option is available, more options will be available in future versions of IFTDSS.

    To condition using a your own Weather Stream:

    1. Click the Condition (Select Classified Weather Stream) button.
    2. Click the Upload button and select a .wxs file from your local machine. See the .wxs File topic for file requirements, or how to generate a new wxs. file for use in this step.
    3. Select a start date from the drop-down menu on which the conditioning period begins.
    4. Enter a time (in 24 hour hhmm format) on which to start and end conditioning.
    5. From the Number of days to condition drop-down menu, select a period for fuel conditioning, up to 7 days.

      you may upload an wxs file to use in fuel moisture conditioning

Specify whether you want the model to simulate random ignitions (default choice), or select a set of random ignitions from a previous LBP run (useful when you're trying to re-create an LBP run to compare treatments, etc.).

the ignition input field contains choices to generate random ignitions, or use random ignitions from a previous LBP run.

  1. Specify a Simulation Time (Burn Period Length), from 4-12 hours. Because inputs should represent “problem fire” conditions, the duration of the burn period should reflect the active burning period of wildfires of the area under extreme conditions.

    simulation time field in IFTDSS

  2. Choose to either leave the Spotting Probability as the default 20% (recommended for many scenarios) or adjust it as needed.

    spotting probability field in iftdss

  3. Choose a descriptive run name and click Run. LBP may take between several minutes and several hours to complete, IFTDSS will automatically send you an email notification when your LBP run is complete.

    You may only have three LBP runs submitted at any given time. If you attempt to submit a fourth run, a notice will appear on the screen to alert you. If this occurs, save your run inputs by clicking the Save button, and submit the run when one of the other three has completed.

  4. Check your run queue position: You can check where "in line" your run is by clicking on the run name in Playground, and referring to the "Run Queue Position" in the right hand panel.

    the run status can be viewed by clicking on the run and reading the information in the right-hand panel.