| Some Flume Types and their usages/applications
Parshall Flumes
The most widely known flume and still the most widely
used for permanent installations. Used in monitoring sewage,
plant effluent and irrigation water. Available in sizes
1" through 12 foot.
Palmer-Bowlus Flumes
Known in the sanitary field where it is widely used
for measuring flows in manholes, temporary installations
or pipelines.
Trapezoidal Flumes
Originally an irrigation flume where it has been used
to monitor flow in furrows and sloping-sided irrigation
ditches. Small size trapezoidal flumes have a v-shaped
throat, the bottom of which is at the same elevation
as the channel invert - thus able to produce accurate
readings at very low flows without the disadvantages
of a v-notch or rectangular weir.
H Flumes
The H-flumes have been introduced to measure effluent,
sewage, or stormwater having a very wide range of flow
that otherwise would be difficult or impossible to measure
in other types of flumes. Flume must be installed with
a free fall off the end
Cutthroat Flumes
Similar to the Parshall flume except that the bottom
is at the same elevation as the channel invert throughout
the length of the flume. The cutthroat flume's greatest
advantage is in its use where head loss is limited.
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