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Table 6.8 – Depth of spreading of a cloud of contaminated air in the
event of an accident on chemically dangerous objects and transport, km (for
degree of vertical air resistance – convection)
0
Q , t t, C Convection
0
Chlorine Ammonia

Wind speed, m/s

1 2 3 4 5 10 1 2 3 4 5 10

–20

0
0.5 < 0.5
+20

+40

–20 0.65 0.50 < 0.5 < 0.5

0 0.75 0.60 0.50 < 0.5
1.0
+20 0.80 0.65 0.55 < 0.5

+40 0.90 0.70 0.60 0.50

–20 1.65 1.10 0.90 0.80

0 1.80 1.20 1.00 0.85
3.0
+20 1.90 1.25 1.05 0.90

+40 2.00 1.35 1.10 0.95

–20 2.25 1.45 1.20 1.10

0 2.40 1.55 1.35 1.20
5.0
+20 2.65 1.75 1.45 1.25

+40 2.85 1.85 1.55 1.35

–20 3.80 2.30 1.80 1.60

0 4.05 2.55 2.05 1.80
10 < 0.5
+20 4.25 2.70 2.20 1.90

+40 4.40 2.75 2.20 1.95

20 –20 5.80 3.55 2.80 2.40 < 0.5

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