Geographical Processes
2. Explain how the four climatic conditions below enhance a bushfire
Climate Conditions: Humidity, Lack Of Rainfall, Wind And Temperature
Humidity- very low humidity (less than 20%) causes fuels to dry out and become flammable
lack of rainfall- leads to dry vegetation, dry leaves and twigs that become fuel for bushfires and, of course, vegetation is very dry in times of drought
wind- air movement provides the oxygen the fire needs to keep burning; stronger winds bring more oxygen and stronger flames and winds also blow embers downwind, causing spotting
temperature- hot are can lower the moisture content of vegetation
3. Australian Vegetation And Bushfires
Describe Three Characteristics Of Australia's Vegetation That Promote The Spread Of Fire. Include Images Of The Different Types Of Vegetation - E.G A Collage Of Images
Climate Conditions: Humidity, Lack Of Rainfall, Wind And Temperature
Humidity- very low humidity (less than 20%) causes fuels to dry out and become flammable
lack of rainfall- leads to dry vegetation, dry leaves and twigs that become fuel for bushfires and, of course, vegetation is very dry in times of drought
wind- air movement provides the oxygen the fire needs to keep burning; stronger winds bring more oxygen and stronger flames and winds also blow embers downwind, causing spotting
temperature- hot are can lower the moisture content of vegetation
3. Australian Vegetation And Bushfires
Describe Three Characteristics Of Australia's Vegetation That Promote The Spread Of Fire. Include Images Of The Different Types Of Vegetation - E.G A Collage Of Images
- Eucalypt litter is coarse and decays slowly, ensuring that after several years there will be an abundant build-up to carry the next fire.
- The bark of many species is flammable and loosely attached to the trees, making ideal firebrands to carry fire across natural barriers.
- The green leaves contain highly flammable oils and resins that act as a catalyst to promote combustion before the leaves are fully dry.