The Nature Of Wildfires Flashcards Preview

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Flashcards in The Nature Of Wildfires Deck (12):
1

Define wildfire

Uncontrolled fire fuelled by natural vegetation

Often start in rural localities and can migrate to rural urban fringes

2

Why are wildfires so dangerous

Burn buildings / animals / people

Uncontrollable/ unpredictable / quick spread

Large size

Spotting

3

Surface fires

Along floor
900 degree
Cool quick
easy controlled but can spread

4

Ground fires

Burn organic matter in soil by glowing combustion
Slow spread
540 degrees
Long period of time

5

Crown fires

Top canopy
1100 degree
Intense - hard to contain
Powers
Spread quick from tree top to tree top

6

Conflagration

Large fire with a character of aggravation - enchaned by wind action and fire brands

7

Ladder effect

Spreading from forest floor to canopy

8

Conditions needed 3

Fuel - dry vegetation

Ignition source - human / physical

Weathering conditions

9

Firebrands

Burning pieces of vegetation carried ahead of fire by convection current or wind 💨

10

Fires in Australia

Hot dry flat

Naturally

Prescribed fires

Victoria

11

Fires in Asia

Affected by El Niño

Caused 1997 fires - drought - health problems - economic losses

South east Asia haze

12

Fires in Europe

Prescribed burning to maintain ecosystem

50,00 annually in Mediterranean basin