42 / 53
P40 = 16
Trapezoidal weir
0.0032 < Q[m
3
/s] < 82
20 <
P41
[°] < 100
0.5 <
P42
[m] < 15
0.1 < h[m] < 2
Q[m
3
/s] = 1.772*
P42
*h1.5+1.320*tg(
P41
/2)*h
2.47
Accuracy:
5%
P
40=16
P
04
P
46
h
P
42
P
41
P40 = 17
Special Trapezoidal (4:1) weir
0.0018 < Q[m
3
/s] < 50
0.3 <
P42
[m] < 10
0.1 < h[m] < 2
Q[m
3
/s] = 1.866*
P42
*h
1.5
Accuracy:
3%
1
4
P
40
=
17
P
46
P
04
h
P
42
P40 = 18
V-notch weir
0.0002 < Q[m3/s] < 1
20 <
P42
[°] < 100
0.05 < h[m] < 1
Q[m
3
/s] = 1.320*tg(
P42
/2)*h
2.47
Accuracy:
3%
P40=18
h
P46
P42
P04