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Unit 7

Unit 7. Fuels and Fire Behavior. Unit Objectives. Identify key elements of the fire environment: Fuels Weather Topography Fire behavior. Pre-burn Reconnaissance Fuels. Targeted participants: - Pilot - Burn Boss/Firing Boss

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Unit 7

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  1. Unit 7 Fuels and Fire Behavior

  2. Unit Objectives • Identify key elements of the fire environment: • Fuels • Weather • Topography • Fire behavior

  3. Pre-burn ReconnaissanceFuels • Targeted participants: - Pilot - Burn Boss/Firing Boss • A thorough recon of the burn area and a discussion of the burn objectives are essential to a successful firing operation • Fire environment elements to consider during the recon include: • Fuel type and loading • Fuel moisture • Chemical properties • Fuel size, shape and compactness • Vertical arrangement and horizontal continuity

  4. Pre-burn ReconnaissanceWeather Factors • Temperature • Relative humidity • Inversions • Wind - Direction - Speed - Duration - Local influences • Recent and expected precipitation

  5. Pre-burn ReconnaissanceTopography • Slope • Aspect • Elevation • Local influences - Canyon - Lakes - Mountains - Glaciers

  6. Pre-burn ReconnaissanceFire Behavior • Fire types - Surface - Crown • Fire growth characteristics - Head fires - Backing fires - Flank fires

  7. Aerial Firing Ignition Patterns • Strip-head • Spot • Chevron • Center • Backing fire • Or a combination of the above

  8. Fire Interaction • Fuels, weather, topography, fire behavior, and ignition patterns all interact to create fire effects. • Adjustments to firing patterns can be made to produce fire effects that will meet burn objective.

  9. Unit Objectives • Identify key elements of the fire environment: Fuels Weather Topography Fire behavior

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