Geoscience Reference
In-Depth Information
(a)
Integral wind-induce d error - Mk2 gage
0.12
k = 1.0
= 1.0
= -1.0
k =
1.0
0.10
0.08
0.06
0.04
115
1 10
0.02
v f = 5 m s 1
v f = 5 m s -1
0.00
0
10
20
30
40
50
Rate of rainfall P (mm h 1 )
(b)
Integral wind-induced e rror - Hellmann gage
0.12
k = 1.0
= -1.0
= 1.0
k =
1.0
0.10
0.08
0.06
115
0.04
110
0.02
v f = 5 m s 1
v f = 5 m s -1
0.00
0
10
20
30
40
50
Rate of rainfall P (mm h 1 )
Fig. 3.24 Example of calculated wind-induced error for the (a) Mk2, (b) Hellmann, and (c) the tipping bucket
ASta (Automatic Station) precipitation gages, as a function of the rate of rainfall P in mm h 1 . The
error was calculated for three wind speeds, as indicated, and for two types of raindrop size
distributions, namely orographic ( κ = 1), and thunderstorm ( κ = 1). (From Nespor and Sevruk,
1999.)
Search WWH ::




Custom Search