Dry deposition and spray drift of pesticides to nearby water bodies
Table 5.
Mean droplet diameter at impact when droplets are directed downward with initial velocity of
20 m s-1 toward a target 0.5 m below point of discharge and through air with various wind
velocities and relative humidities. (From Reichard et al, 1992)
Tabel 5.
Gennemsnitlig dråbediameter ved nedslag for 0.5 m under udgangspunktet for dråber med
en begyndelseshastighed på 20 m s-1 ved forskellig vindhastighed og relativ fugtighed.
Final mean droplet diameter (µm)
Relative humidity (%)
Initial
Droplet
Size
(µm)
Wind
velocity
(m s-1)
20
40
60
80
60
0.5
*
*
41
53
60
1.0
*
**
37
52
80
0.5
63
69
74
77
80
1.0
62
68
73
77
80
2.0
61
68
73
77
100
0.5
92
95
97
98
100
1.0
92
94
97
98
100
2.0
92
94
97
98
100
4.0
92
94
97
98
200
0.5
200
200
200
200
200
1.0
200
200
200
200
200
2.0
200
200
200
200
200
4.0
200
200
200
200
* droplets totally evaporated ; ** drift distance longer than 6.0 m
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