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Teacher Information! Necessary materials: PowerPoint Guide Fire Pgs 277-283 in Ch.22 of Managing Our Natural Resources Rangelands , Forests, & Fire Students will be able to… Explain the fire triangle and how this is used for fighting fire.

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teacher information
Teacher Information!
  • Necessary materials:
    • PowerPoint Guide
slide2

Fire

Pgs 277-283 in Ch.22 of Managing Our Natural Resources

Rangelands, Forests, & Fire

students will be able to
Students will be able to…
  • Explain the fire triangle and how this is used for fighting fire.
  • Discuss the positive and negative aspects of fire.
largest u s fires
Largest U.S. Fires
  • Peshtigo, 1871
    • 3.8 million acres
    • Wisconsin & Michigan
    • Escaped slash fire in a hot, dry summer
  • Miramichi, 1825
    • 3 million acres
    • Maine & New Brunswick
u s fire history
U.S. Fire History
  • Taylor Complex—2004
    • Fires in 2004 burned > 6.3 million acres in Alaska
  • Murphy Complex—2007
    • > 650,000 acres
    • Largest Idaho fire in recent history
fire wild and tame
Fire: Wild and “Tame”
  • Wildfire  any uncontrolled fire
    • Bush fire, grass fire, forest fire
  • Prescribed fire  Controlled use of fire to accomplish specific purposes
wildfire benefits
Wildfire Benefits
  • Wildfires are a natural part of many ecosystems
  • Sets back succession
    • Some wildlife species need earlier successional forest habitat
  • Aids the reproduction of some conifer species
wildfire benefits8
Wildfire Benefits
  • Improves wildlife habitat
    • Creates open spaces for wildlife
    • Exposes seeds and insects
  • Returns nutrients to soil
  • Removes debris from forest floor
negative effects of wildfire
Negative Effects of Wildfire
  • Pollutes streams & ponds
  • Kills or injures wildlife & habitat
  • Can effect local & state economy
  • Dangerous to human lives & property
prescribed fire benefits
Prescribed Fire Benefits
  • Reduces fuel available for wildfire
  • Improves wildlife habitat
  • Site preparation  Reduces competition & provides suitable seedbed
  • Range management Improves forage quality
prescribed fire benefits11
Prescribed Fire Benefits
  • Most economical tool for cleaning operations in young pine stands
  • Disease control
  • Improved accessibility & visibility for timber cruising
prescribed fire
Prescribed Fire
  • Weather conditions must be perfect
    • Sufficient relative humidity
    • Low wind speed
  • Sufficient fuel loads
  • Maintain low heat
  • Should only be done by trained professionals
the fire triangle
The Fire Triangle
  • To produce fire, three things must be present at the same time- fuel, heat, and oxygen

FUEL

HEAT

OXYGEN

the fire triangle14
The Fire Triangle

The fire triangle is like a three-legged stool. If you remove one leg, the fire goes out.

heat

fuel

oxygen

how is the triangle broken
How is the triangle broken?
  • Some of the ways used to break the fire triangle are:
    • fire rake FUEL
    • fire flap or pine top OXYGEN
    • backpack water pump HEAT
    • tractor with a fire plow FUEL
    • backfire torch FUEL
    • airplane water bomb HEAT
    • prescribed burning FUEL

Substance Eliminated

review
Review
  • Explain the fire triangle and how this is used for fighting fire.
  • Discuss the positive and negative aspects of fire.