Mapping Exercise - Triangulation

Personnel Required

Equipment Required

  • Brogo Topographic Map
  • Compass
  • Forest Fire Danger Meter

DATA

•   Position 1: grid location - 565518: smoke sighting at 190 degrees

•   Position 2: grid location - 568486: smoke sighting at 340 degrees

•   Position 3: grid location - 524506: smoke sighting at 90 degrees

1    What is the grid location of the fire?

2    On what contour line is the fire at the moment?

3    If the wind is coming from the SW, what would the fire potentially do at location 569509?

4    Using a forest fire meter, determine the following information required for this fire. The fire danger index = 10, the humidity = 20%; the temperature = 30 degree; wind speed = 30 kmh and the fuel load = 15 tonne/hectare

    a)    What is the rate of spread?

    b)    What will the flame height be?

    c)    What will the spotting distance be?

5    What would you expect the rate of spread to do at the location of this fire?

6    How long would the fire take to get to 569509?

7    Would you stay to fight it at location 569509? Why?

8    Where is the nearest water source?

9    How far by road to this source?

10   How long would it take to get there?

11   What might you need to draught water at this site?

 

 

 

Suggested Answers

1    563500

2    560 m

3    Jump Mumbulla Rd, burn down slope

4 a)  0.68 kmh

   b)  12 m

   c)  2.2 km

5   Speed up - 0.68 kmh

6   approx 10 min

7   No - Terrain is too steep and spotting danger.

8   Mumbulla Falls

9   7 km by 2 wd road

10  approx 25 min

11  Pump, foot valve, shovel, draughting hose