RBCFive
portable flumes were developed in the mid-1980’s by Marinus Bos
(International Institute for Land Reclamation and Improvements), John
Repolge and Albert Clemmens (U.S. Water Conservation Laboratory), for use
in measuring very low flows in furrows and small earthen channels. More accurately defined as
broad-crested weirs; RBC flumes are in some ways a cross between Trapezoidal
and Palmer-Bowlus
flumes.
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From left to right: 150mm (with bubble tube), 75 mm, and 100mm RBC flumes
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Primary
advantages include:
- The ability to
accurately measure (+/-2%) very low flows
- Simple construction
- Trapezoidal
cross-section (conforms to natural channels)
- Portability
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RBC
flumes are sized by throat width and range in size from 50mm to 200mm.
The flumes are scale models of each other (as with Palmer-Bowlus
flumes) and follow standardized dimensions. For flumes provided without the inlet and outlet
wingwalls, grout should be used to create a smooth transition from the
channel into and out of the flume. RBC flumes should only be used in those applications
where little or no solids are expected due to the physical size of the
flume. Channel slope
should not exceed 1%.
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Options
and Accessories
- Ultrasonic mounting
brackets (only suggest for use with stilling wells or the 200mm
size flume)
- Bubble tubes
- Stilling wells
(detached)
- Staff gauges
- Inlet and outlet
wingwalls
- Chemically resistant
gel coat
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Listed
below are the standard RBC flumes and their recommended flow ranges.
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Specifications
- Installation
Instructions - Typical Drawing
If you would like additional information, pricing,
or assistance
in sizing and specifying a flume, please fill out
and submit our
flume application form.
Note: If you are unable to view those materials on your
machine,
please download Adobe Acrobat® 5.0 Reader.
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