P601 for P600 = 1 ( cont’d )
FLUMES (cont’d)
Leopold Lagco (as manufactured by Leopold Co., Inc.)
» designed to be installed directly into pipelines and manholes
» Leopold Lagco may be classed as a rectangle Palmer-Bowlus flume
» sized by pipe (sewer) diameter
» for rated flows under free flow conditions, the head is measured at a
point upstream referenced to the beginning of the converging section.
Refer to the following table :
» general free flow equation is Q = KH
x
, where: Q = flow
K = constant
H = head
x = exponent
throat
Q
converging
diverging
plan
point of measurement
side
transducer
0
head
front
Flume Size Point of Measurement
(pipe dia. in inches) cm inches
4 - 12 2.5 1
15 3.2 1
1
/
4
18 4.4 1
3
/
4
21 5.1 2
24 6.4 2
1
/
2
30 7.6 3
42 8.9 3
1
/
2
48 10.2 4
54 11.4 4
1
/
2
60 12.7 5
66 14.0 5
1
/
2
72 15.2 6
PL-507 108
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