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Wildfires

Wildfires are uncontrolled fires that typically occur in wilderness areas. They rely on the Fire Triangle which includes heat, fuel, and oxygen. Heat ignites the fire and sustains its spread by drying nearby fuel; fuel can be any combustible material influenced by moisture and arrangement; oxygen, comprising 21% of air, supports combustion. Wildfires can result from human negligence, climate change, and drought. Prevention methods include campfire safety and equipment maintenance. Interestingly, some ecosystems, like Giant Sequoias, require fire for regeneration.

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Wildfires

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  1. Wildfires

  2. What is a Wildfire? • An un controlled fire often occurring in wild land areas

  3. What is a Fire? • The Fire Triangle • Heat • Fuel • Oxygen

  4. Heat • A heat source is responsible for the initial ignition of fire, and heat is also needed to maintain the fire and permit it to spread. Heat allows fire to spread by removing the moisture from nearby fuel, warming surrounding air, and preheating the fuel in its path, enabling it to travel with greater ease.

  5. Fuel • Fuel is any kind of combustible material, and is characterized by its moisture content (how wet the fuel is), size and shape, quantity, and the arrangement in which it is spread over the landscape. The moisture content determines how easily that fuel will burn.

  6. Oxygen • Air contains about 21% oxygen, and most fires require at least 16% oxygen content to burn. Oxygen supports the chemical processes that occur during a wildland fire. When fuel burns, it reacts with oxygen from the surrounding air releasing heat and generating combustion products (i.e. gases, smoke,embers). This process is known as oxidation.

  7. What causes Wildfires? • Human Carelessness • Climate Changes • Drought

  8. How can we prevent Wildfires? • Campfire Safety • Debris Burning • Equipment Maintainence • House Safety

  9. Is there anything GOOD about Fire??? • Giant Sequoias Need Fire

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