7. Which of the followings may be
considered as bush fire fuel?
(a) Shrubs and healthy plants
(b) Grasses
(c) Trees, logs, stumps and bark
(d) All of these
Plz say me the correct bit friends :)
Answers
Answer:
(d)
Explanation:
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Answer:
Predicting when and where bushfires are likely to occur is obviously an important and useful part of bushfire management. It will be particularly important across many parts of Australia where the number of days of extreme fire danger are projected to increase under climate change.
Current thinking around predicting bushfires incorporates four ‘switches’ which all need to be ‘on’ for a fire to occur.
FUEL TO BURN
The Australian bush, though it has a reputation for being dry and scrubby, varies greatly from place to place around the country. There are regions of open woodlands, grassland savannas, dense rainforest. A bushfire will burn anything that it finds in its path, but different types of vegetation burn differently. Generally, fuel is classified as being fine (grasses and twigs that are less than 6 millimetres in diameter) or heavy (branches, logs or stumps). Finer fuels burn more easily, feeding the spread of the fire, but heavier fuels burn with greater intensity, creating more heat and making the fire more difficult to put out.
Fuel loads accumulate in different types of vegetation at different rates. In Western Australia, jarrah (Eucalyptus marginata) forests build up fuel at a rate of around 1–2 tonnes per hectare per year, while karri (Eucalyptus diversicolor) forests accumulate around 3–4 tonnes of fuel per hectare per year.