AFDRS Calcs
Calculator
Fire Behaviour Index
Fire Danger Rating
Flame Height
Spotting Distance
Rate of Spread
Fuel Moisture Content
Intensity
Crown Probability
Spread Probability
Spread Index
Calculate
Model
Buttongrass
Forest
Grassland
Heathland
Mallee heath
Pine
Savanna
Spinifex
Sub-model
Buttongrass
Time of day (24hr)
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Month
1
2
3
4
5
6
7
8
9
10
11
12
Temperature
0
50
25
Relative humidity
5
100
30
10m Wind Speed
0
70
20
Drought Factor
8
Range: 1 - 10
Canopy Height (m)
10
Range: 5 - 30
Canopy Coverage (%)
50
Range: 0- 100
Current surface fine fuel load (t/ha)
10
Range: 0 - 20
Current Fine fuel load (t/ha) - Near Surface
2
Range: 0 - 8
Current Fine fuel load (t/ha) - Elevated
2
Range: 0 - 8
Current Fine fuel load (t/ha) - Bark
2
Range: 0 - 8
Current overstory (canopy) fine fuel load (t/ha)
4.5
Range: 0 - 15
Current Fine fuel load (t/ha) - Total available
12
Range: 0 - 30
Height (cm) - Near Surface
20
Range: 0 - 40
Height (m) - Elevated
2
Range: 0 - 4
Height curve k value - Near Surface
1.0
Range: 0 - 1
Wind reduction factor for Vesta for Wet Forest
3
Range: 2.5 - 5
Dew Point Temperature
6
Range: -6 - 45
Time since fire
25
Range: 1 - 25
Grass Curing (%)
100
Range: 0 - 100
Grass condition
Eaten Out
Grazed
Natural
Grass Load
4.5
Range: 1 - 12
Drought Index
100
Range: 0 - 200
Recent Rainfall
0
Range: 0 - 100
Time since rain
48
Range: 0 - 48
Soil Moisture
0
Range: 0 - 1
Fuel accumulation curve k value - Surface
1.0
Range: 0 - 1
Fuel accumulation curve k value - Near Surface
1.0
Range: 0 - 1
Fuel accumulation curve k value - Elevated
1.0
Range: 0 - 1
Fuel accumulation curve k value - Bark
1.0
Range: 0 - 1
Fuel accumulation curve k value - Overstorey (Canopy)
1.0
Range: 0 - 1
Fuel accumulation curve k value - Total available
1.0
Range: 0 - 1
Height (m) - Overstorey (Canopy)
20
Range: 10 - 60
Cover (%) - Overstorey (Canopy)
40
Range: 0 - 100
Are the trees less than 10m tall?
No
Yes
Heathland below Woodland Canopy?
No
Yes
Buttongrass Productivity
Low
Medium
Spinifex productivity
Low
Medium
High