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Flashcards in Factors Favourinf Wildfires Deck (18):
1

Vegetation type.

Sufficient quantity of DRY vegetation 🌷
Grasses wilt during drought periods - susceptible.
Fire aids seed germination.

2

What veg withstands Fire?

Pyrophytic species
Resistant bark

3

What does the vegetation act as?

Fuel.

4

Name fuel characteristics

Vegetation
Dry
Sufficient quantity
Dense


(Climate impacts this)

5

Climate

It affects frequency and duration of drought - veg dries out.

Affects type of vegetation that will grow.

Rate it will grow.

Rain also needs for plant growth but this will inhibit fires

6

What does climate act as?

Ignition source.


(Worse due to global warming)

7

Favourable weather conditions

Storms generate lightening/ lack of rainfall - ignition.

Heatwaves / El Niño / droughts

Friends with strong winds

8

Name 2 types of lightening

Cold 🥶 = intense electrical current with short duration.

Hot 🥵 = lower voltage , longer duration

9

Name 3 things fire needs to thrive ?

1. Fuel

2. Oxygen

3. Heat

10

Fire behaviour

Crowing.
Spotting.
Depends upon vegetation, space between fuels, wind, topography, season , temp

11

Vegetation

Dry - spread easily.
Fuel.
Sufficient load

12

Space

Closer fuels - more spread.

Fire breaks spreads fuels out meaning less likely to spread as quick.

However , spotting can occur.

13

Wind

Higher speeds more spread ( not too high or will put fire out)

Change in wind direction causes further spread

14

Topography

Travel faster uphill.

15

Seasons

Summer - hotter / dryer

16

Temp

Higher temps absorbs moisture from fuels and makes it more dry - more conductive to catch fire

17

Outline how fires can be started (3 marks)

1. Ignition source needs to be established.
Lightening is the most common way natural fires are caused - linked with storms.
However, humans can ignite fires through recreational use / arson.
2. The ignition source will need to ignore a fuel.
This is dry / dense vegetation which will easily become sparked by ignition.
3. Combustion reaction occurs and fire is produced as long as fuel is present fire can thrive / spread.
4. canadas Alberta province receives many fires due to dry warm land and lightening

18

How do human responses reduce impact of fire ?

Careful monitoring means able to distinguish quickly weather a fire is happening. The issue warning can alert and evacuation.
Evacuation reduces death tolls/ injury.
Fire fighters / water bombs mitigate but stopping spread.
NGOs provide aid after , to help adapt to situation.
Money given from governments / overseas.
Shelter.