r
as if the segment ha: come from # ix. 1
source located at a distance Pao
The sive increases .inear.. w ti
upwind.
» sordera :f the cloud will diverge
‘f mis greater thar .,°
particie.
more rapidl’, ai if mis
leas 7
distance travelled by the central
‘cey wilt diverge less rapidly.
a:
One c&r. orevert ary .ncrease wr -.ze eltrer ov making Bp infinite or by
Ts
making oroecua. cc zero,
is similar +.
“his mene
‘rat 0! Sutton, ovt um
If ms 2, thar a
«uf"dorertis
ta ge
oe
descrining the diffusive process
exactly tne same,
141,ue4 of t, the area covered by a
segment of c.o 4 is ccopertiona: .<c : 18 square <f the time, as in Felt's
method,
However
height, and
¢*e
nropertiona: it
Curt e:, ‘me overa.
with the cveral: streret!
"acu. 7 Warles,
as w varies with
aver.ve oroportionalit; factor changes
of ce wir: “.# 1, anc in these respects it
differs fram Fel: 2 nethon,
Returning te the cas.c
tne argument
aquatic
, ° « )
5 we of variable fran f to t changes
(ff toe ccma@rithun ors
t_£(h
h
and df becomes ot
f
‘
One notes alas: that
corceamtratiors 41
tc those that wru.c ‘ave existet
being es* imatac.
a
'
'#
©
initia: eloud must be reduced
wtme for whicr tre dose rate is