S190 Unit 2 Fuels

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Artificial fuels

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Materials such as houses, sheds, fences, pipelines, and trash piles.

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Climate zones influence...

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Fuel distribution, which varies significantly across the United States.

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Grass responds quickly to wind and changes in relative humidity and is considered a 1-hour fuel.

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This is a 1-hour fuel type.

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This fuel model is a mixture of fine grass and shrubs.

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Grass-shrub

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This fuel type may have fires that spread rapidly with wind but more slowly than the grass fuel type.

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grass-shrub

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Fires generally move more slowly in timber types than in grass or shrubs but...

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Timber fires burn for longer and are harder to control.

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Why is understanding fuel characteristics crucial for predicting fire behavior?

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Different fuel types can vary in behavior due to their specific characteristics.

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A timber fuel type in the Pacific Northwest and in the Eastern region are the same.

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No, each region has different species that grow there, so knowing your fuel types is very important to understanding how they affect fire spread.

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This fuel model is

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slash/blow-down

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Fuels in the same size class have similar properties such as

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They have similar drying, wetting, preheating, and ignition rates.