Skip to main content

Simplified Flow Corrections for Parshall Flumes Under Submerged Conditions

Robinson, A.R. (1965) Simplified Flow Corrections for Parshall Flumes Under Submerged Conditions. In: Engineers' Notebook, Civ. Engr. p. 75. American Society of Civil Engineers.

[img] PDF

Download (72kB)


Parshall flumes are widely used for
measuring flow in canals, domestic
water supply and sewage systems, and
to a limited extent in natural streams.
Normally, the device operates like a
weir, the flow being contracted and
passing through a critical depth. This
condition is termed free flow and only
one depth measurement, ha, in the converging
section is required to determine
the flow. The discharge is given by the
general relationship,
Q = K ha
in which K and n are constant for a
given size but vary for different sizes.
Standard design data and calibration
tables are available for flume sizes
ranging in throat width from 1 in. to 50
ft, and in discharge from 0.01 to 3,300
cfs. One particular advantage of using
flumes rather than weirs is that the
head loss is less, that is, there is a
smaller change in the depth of the flow
as it passes through the structure.

Item Type: Book Section
NWISRL Publication Number: 0029
Subjects: Research methodology
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 07 Mar 2008 18:49
Last Modified: 15 Mar 2017 22:43
Item ID: 723