Dwyer ULL - Manual (Page 12)

Flume/Weir Types
This is the first value (X) entered for the Pr00 function. The following flume/weir
types are available both in European and American standard:
Flumes/Weirs - European Standard
Rectangular Suppressed Sharp-Crested Weir (Type 1)
Rectangular Contracted Sharp-Crested Weir (Type 2 )
Trapezoidal (Cipolletti) Sharp-Crested Weir (Type 3)
V-Notch (Triangular) Sharp-Crested Weir (Type 4)
Page 11
European Standard
Pages 11-13
Rectangular Suppressed
Sharp-Crested Weir, Page 11
Rectangular Contracted Sharp-
Crested Weir, Page 11
Trapezoidal (Cipolletti) Sharp-
Crested Weir, Page 11
V-notch (Triangular) Sharp-
Crested Weir, Page 11
Khafagi-Venturi Flume, Page 12
Parshall Flume, Page 12
Palmer Bowlus Flume
Trapezoidal Throat Cross-
Selection, Page 12
H Flume, Page 12
Neyrpic Venturi Flume/Long-
Base Weir, Page 13
Type (X)
1
2
3
4
5
6
7
8
9
American Standard
Pages 13-14
Rectangular Suppressed Sharp-
Crested Weir, Page 13
Rectangular Contracted Sharp-
Crested Weir, Page 13
Trapezoidal (Cipolletti) Sharp-
Crested Weir, Page 13
V-notch (Triangular) Sharp-Crested
Weir, Page 13
Parshall Flume, Page 14
Palmer Bowlus Flume Trapezoidal
Throat Cross-Selection, Page 14
H Flume, Page 14
Leopold-Lagco Flume,
Page 14
Code (YY)
01
02
03
04
05
06
07
08
Crest Length (cm)
20
40
60
80
100
150
200
300
Figure 11: Rectangular Suppressed Sharp-Crested Weir
Code (YY)
01
02
03
04
05
06
07
08
09
10
Crest Length (cm)
20
30
40
50
60
80
100
150
200
300
Figure 12: Rectangular Contracted Sharp-Crested Weir
Code (YY)
01
02
03
04
05
06
07
08
Crest Length (cm)
30
45
60
80
100
150
200
300
Figure 13: Trapezoidal (Cipolletti) Sharp-Crested Weir
Code (YY)
01
02
03
04
05
06
07
08
09
10
V-Notch Angle (°)
90
60
53.8
45
30
28.4
22.5
90
45
22.5
Figure 14: V-Notch (Triangular) Sharp-Crested Weir
British Standard