Water Needs on the Fireground

The following data is based on equations from:
"Safe and Productive Bushfire Fighting with handtools"
by Budd, Brotherhood, Hendrie, Cheney & Dawson. Australian Government Publishing Service, 1996

Strenuous Activity Away from Fire

  AIR TEMPERATURE (°)
BODY
WEIGHT
(kg)
Litres/Hour 20 25 30 35 45
50 0.32 0.5 0.68 0.86 1.04
60 0.5 0.68 0.86 1.04 1.22
70 0.68 0.86 1.04 1.22 1.4
80 0.86 1.04 1.22 1.4 1.58
90 1.04 1.22 1.4 1.58 1.76
100 1.22 1.4 1.58 1.76 1.94

Moderate Activity Away from Fire

  AIR TEMPERATURE (°)
BODY
WEIGHT
(kg)
Litres/Hour 20 25 30 35 45
50 -0.02 0.14 0.29 0.45 0.6
60 0.02 0.18 0.33 0.49 0.64
70 0.06 0.22 0.37 0.53 0.68
80 0.1 0.26 0.41 0.57 0.72
90 0.14 0.3 0.45 0.61 0.76
100 0.18 0.34 0.49 0.65 0.8

Light Activity Away from Fire

  AIR TEMPERATURE (°)
BODY
WEIGHT
(kg)
Litres/Hour 20 25 30 35 45
50 0.04 0.11 0.18 0.25 0.32
60 0.08 0.15 0.22 0.29 0.36
70 0.12 0.19 0.26 0.33 0.4
80 0.16 0.23 0.3 0.37 0.44
90 0.2 0.27 0.34 0.41 0.48
100 0.24 0.31 0.38 0.45 0.52

Strenuous Activity Beside Fire

  AIR TEMPERATURE (°)
BODY
WEIGHT
(kg)
Litres/Hour 20 25 30 35 45
50 0.67 0.85 1.03 1.21 1.39
60 0.85 1.03 1.21 1.39 1.57
70 1.03 1.21 1.39 1.57 1.75
80 1.21 1.39 1.57 1.75 1.93
90 1.39 1.57 1.75 1.93 2.11
100 1.57 1.75 1.93 2.11 2.29

Moderate Activity Beside Fire

  AIR TEMPERATURE (°)
BODY
WEIGHT
(kg)
Litres/Hour 20 25 30 35 45
50 0.18 0.33 0.49 0.64 0.8
60 0.22 0.37 0.53 0.68 0.84
70 0.26 0.41 0.57 0.72 0.88
80 0.3 0.45 0.61 0.76 0.92
90 0.34 0.49 0.65 0.8 0.96
100 0.38 0.53 0.69 0.84 1.0