Mapping Exercise - Triangulation
- Published: Friday, 16 January 2015 00:58
- Written by Peter van Bracht
- Brogo Topographic Map
- Forest Fire Danger Meter
• 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?
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