320
K. F. BOWDEN ET AL.
0 *
1 0 1
r
1
5
x)
a0
50
100
Dlffmton 11me (mn)
Fici. 3. Change of c : with t for a dye plume in Liverpool Bay9 8 September 1971. Sampling
depths: + 1.3 nl, A2.55 m. 0 3.8 m.
TABLE II. Observed valun of diffusioe velocity
Area
-
Holy Loch
D Red Wharf Bay
1) Red Wharf Bay
G OR Cumberlund
C Liverpool Bay
E Liverpool Bay
F Otr Isle of Man
Year
IW9
196Y
I971
196Y
I970
1971
1971
Number of
Mean
releases
current
(cm/=)
2
7
4
52
4
55
2
58
4
72
2
22
6
x3
Diffusion velocity 5
Range
Median
(cm/sec)
(cm/sec)
0.4-0.5
0.4.5
0.7- 1 .R
1.1
0.7-1.1
0.75
0.3 2.6
1 .?
1.3 1.6
I .1s
0.8 1.3
I ?
0.4 -0.11
0.6