Introduction to Wildland Fire Behavior

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S-190 Introduction to Wildland Fire Behavior

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Why we feel fire behavior training is critical

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COURSE OBJECTIVESIdentify the environmental factors of wildland fire behavior that affect the start and spread of wildland fire. Recognize situations that indicate problem or extreme wildland fire behavior. Identify and discuss the three sides of the fire triangle.

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Unit 1 Objectives1. Describe the fire triangle 2. Identify three methods of heat transfer 3. List the three env. elements affecting fire behavior. 4. List three fuel factors that affect wildland fire. 5. List 3 weather factors that affect fuel moisture 6. Describe how wind affects wildland fire spread 7. Describe the effect of slope on wildland fire spread 8. List 4 topographic factors that affect wildland fire behavior 9. Describe the dangerous conditions that can develop in a box canyon & steep narrow canyon

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1. Describe the fire triangle

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HeatFuelOxygen

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HEAT SOURCESLightning Cigarettes Powerlines Catalytic converters Small engine sparks Matches Magnifying glass

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FUELSGrass Shrubs Trees Houses Propane tanks Wood piles Decks

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OXYGEN

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2. Identify three methods of heat transfer

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Radiation

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Convection

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Conduction

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3. List the three env. elements affecting fire behavior.

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Three Principal Environmental Elements Affecting Wildland Fire BehaviorFuelsWeatherTopography

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Group Exercise #1 Group 1: Identify the factors of fuels that affect fire behavior. Group 2: Identify the factors of weather that affect fire behavior. Group 3: Identify the factors of topography that affect fire behavior.video

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Fuel Type Fuel Moisture Size and Shape Fuel Loading Horizontal Continuity Vertical Arrangement

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Fuel TypesGrassBrushTimberLogging Slash

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Fuel Moisture: The amount of water in a fuel expressed as a percentage of the oven-dry weight of that fuel

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Categories of Fuels Light fuels: Grass, Leaves, Shrubs Heavy fuels: Limbs, Logs, Stumps

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Light Fuels

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Heavy Fuels

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Fuel Loading:The quantity of fuels in an area. Generally expressed in Tons per Acre.

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Horizontal Continuity: Uniform vs PatchyVertical Arrangement - Ground - Surface - Aerial

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Last Updated: 8th March 2018

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