Fires in nature Flashcards
1
Q
Wildfire
A
- Uncontrolled rural fire
2
Q
Types of wildfire
A
- Crown fire
- Surface fire
- Ground fire
3
Q
Crown fire
A
- Spreads across tree canopies
- Affects forested areas
4
Q
Surface fire
A
- Burns across surface vegetation
5
Q
Ground fire
A
- Burns beneath the ground in layers of dry organic peat
6
Q
Type and amount of fuel
A
- Ready supply of fuel
- Tinder dry veg
7
Q
Ignition source
A
- Natural;
- Lightening
- Human = spark
8
Q
Favourable climatic conditions
A
- High temps = dry veg = burn faster
- Wind = unpredictable factor
- +02
- Dried potential fuel
- Pushes fire across land faster
9
Q
Recent weather
A
- Drought = more intense
10
Q
Fire behaviour
A
- Creeping = moves across ground fairly slow
- Running = spreads rapidly + more intense
11
Q
Fire propagation
A
- Spread and shape of direction
- Influenced by strength, direction and variability of wind
- Speed of diffusion determined by - fuel, flammability and topography
12
Q
Terrain
A
- Burn faster uphill - flames reach more unburnt fuel
- Radiant heat pre-heats the fuel in front of fire = flammable
