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