Table 5e
6
omtarison of fallout (me/mi=/mo ) in rain water to total fallout! )
Air Force
___Rain Water _
Sampling
Total
Month
New York
Roof Fots
Average
Activity
Total
sro
New Haven
Dust Fall
F
activity Sr2°
Pittsburgh
Rainfall
Total f
activity sr2°
sr
March
20
1.3
L6
109
=—
==
1.4
April
LS
1.3
84
0.8
63
203
1.0
May
21
1.2
71
160
he
0.6
105
June
17
0.8
27
0.8
28
O06
lel
July
27
1.5
77
0.6
=-
woe
0.6
The best comparison between rain water data and total fallout
should be obtained using gummed film data, since the gummed film network
covers the same area as the rain water stations and operated over the same
sampling period,
in figure ,
Tne positioning of the two sampling networks is shown
Because only 14 of the stations are duplicated, geographic
extrapolation is employed to obtain values for the rain water sites that
are not covered by gummed film stations.
Distences of 100, 150, 200 and
500 miles were used as extrapolation radii, but it was found that the
distance used made little difference in the final correlation,
150 miles
was chosen as the optimum distance because, when circles of this radius
were drawn around ths rain water sites, a maximum number of gummed film
stations fell within the given areas with a minimum number of circles
|
overlapping.
Wath cats scheme there are 11 results that may be compared in
March; 30, in Aprii: 20, in May3 25, in June, end 23 in July.
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