Page 349 - Fundamentals of Air Pollution 3E

304 19. Transport and Dispersion of Air Pollutants

TABLE 19-5
Pasquill-Gifford Vertical Dispersion Parameter
Stability Distance (km) a b O"/

A >3.11 5000m
0.5-3.11 453.85 2.1166
0.4-0.5 346.75 1.7283 104.7
0.3-0.4 258.89 1.4094 71.2
0.25-0.3 217.41 1.2644 47.4
0.2-0.25 179.52 1.1262 37,7
0.15-0.2 170.22 1.0932 29.3
0.1-0.15 158.08 1.0542 21.4
<0.1 122.8 0.9447 14.0
B >35 5000m
0.4-35 109.30 1.0971
0.2-0.4 98.483 0.98332 40.0
<0.2 90.673 0.93198 20.2
C all x 61.141 0.91465
D >30 44.053 0.51179
10-30 36.650 0.56589 251.2
3-10 33.504 0.60486 134.9
1-3 32.093 0.64403 65.1
0.3-1 32.093 0.81066 32.1
<0.3 34.459 0.86974 12.1
E >40 47.618 0.29592
20-40 35.420 0.37615 141.9
10-20 26.970 0.46713 109.3
4-10 24.703 0.50527 79.1
2-4 22.534 0.57154 49.8
1-2 21.628 0.63077 33.5
0.3-1 21.628 0.75660 21.6
0.1-0.3 23.331 0.81956 8.7
<0.1 24.260 0.83660 3.5
F >60 34.219 0.21716
30-60 27.074 0.27436 83,3
15-30 22.651 0.32681 68.8
7-15 17.836 0.4150 54,9
3-7 16.187 0.4649 40.0
2-3 14.823 0.54503 27.0
1-2 13.953 0.63227 21,6
0.7-1.0 13.953 0.68465 14.0
0.2-0.7 14.457 0.78407 10,9
<0.2 15.209 0.81558 4.1
" cr z at boundary of distance range for all values except 5000 m.
Note: o- 2 (meters) = a^; x is downwind distance in kilometers.