P601 for P600 = 1 ( cont’d )
FLUMES
Parshall Flume
» sized by throat width
» set on solid foundation
» general free flow equation is Q = KH
x
where: Q = flow rate
K = constant
H = head
x = exponent
» For rated flows under free flow conditions, the head is measured at
2
/
3
the length of the converging section from the beginning of the
throat section.
Khafagi Venturi
» for rated flows under free flow conditions, the head is measured 15 cm
( 6" ) upstream from the beginning of the converging section.
C
2
/
3
C
plan
transducer
side
0
head
front
15 cm (6")
plan
transducer
front
0
head
side
PARAMETERS
PL-507 107
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