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Cast-in-Place Concrete Trapezoidal Measuring Flumes

Bondurant, James A. and Humpherys, A.S. and Robinson, A.R. (1969) Cast-in-Place Concrete Trapezoidal Measuring Flumes. USDA-ARS No. 41-155. 16 pp.

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Water measurement is an important part of the
operation of an efficient irrigation system. It serves
several purposes: (1) Assures equitable water distribution
according to right or need, (2) assures the design
flow rate for correct functioning of the farm irrigation
system, and (3) provides a record of delivery for
payment. Irrigation water is usually measured with
measuring flumes, weirs, or submerged orifices.
Measuring flumes, such as the Parshall flume, are
widely used and have operational characteristics superior
to those of other methods of water measurement.
Flumes with trapezoidal cross-sections are used to a lesser
extent, but they have certain advantages over rectangular
flumes. They have less head loss and better trash
clearance capability; they can be installed without a
transition section since their trapezoidal shape corresponds
to that of most irrigation ditches; and they are
easily cast in existing slipform concrete-lined ditches.
This report describes the construction and operation
of trapezoidal cast-in-place flumes for standard 1-foot-bottom
concrete ditches. Flumes of other sizes and
capacities can be installed in the same manner.

Item Type: Technical Bulletin
NWISRL Publication Number: 0148
Subjects: Research methodology
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:57
Last Modified: 07 Mar 2017 23:35
Item ID: 1108