Your Cutthroat Flume Leader

The Cutthroat flume, so named due to the absence of a parallel-wall throat section (as on the Parshall flume), was designed for flat gradient channels. Commonly used in stream gauging and agricultural applications, the use of the Cutthroat flume is now expanding into sanitary and flow splitting applications.

Available in Multiple Sizes with Many Options

Developed in the mid-1960's the Utah State University Water Research Laboratory, Cutthroat flumes are sized by throat width and overall length. A number of styles are commercially available. The most commonly used types are listed in the chart below. Note that it is not uncommon for intermediate (or even custom) sizes to be specified.

Primary Advantages

  • The straight through bottom (for silt and debris passage)
  • Simplicity of form
  • Scalability to intermediate sizes
  • Constant dimensional configuration
  • Able to operate under free flow conditions with submergence ratios up to 79-88% (depending upon the flume size)

Options and Accessories

  • Ultrasonic mounting brackets
  • Bubble tubes
  • Sample tubes
  • Submerged probe cavities
  • Stilling wells (detached)
  • Staff gauges
  • Removable probe holders
  • Inlet and outlet end adapters
  • Pipe stubs
  • Flanged end connections
  • Fiberglass grating
  • Riser boxes
  • Multi-piece construction
  • Chemically resistant gel coat
  • Cutthroat application
  • cutthroat flume installed
  • flow through a cutthroat flume

Technical Details

Flume Sizes and Recommended Flow Ranges

Size & Style Recommended Flow Rates
18” L x 1” W 2 – 56 GPM
18” L x 2” W 5 – 144 GPM
18” L x 4” W 9 – 223 GPM
18” L x 8” W 19 – 474 GPM
36” L x 2” W 5 – 322 GPM
36” L x 4” W 10 – 655 GPM
36” L x 8” W 19 – 1,333 GPM
36” L x 16” W 39 – 2,712 GPM
54” L x 3” W 8 – 866 GPM
54” L x 6” W 17 – 1,763 GPM
54” L x 12” W 34 – 3,588 GPM
54” L x 24” W 69 – 7,301 GPM
108” L x 12” W 128 – 6,932 GPM
108” L x 24” W 260 – 14,106 GPM
108” L x 48 ” W 528 – 28,699 GPM
108” L x 72” W 800 – 43,494 GPM

Additional Examples

Click on any image to see it full size. Then, click the X to close the full-size image. You can scroll through the full size images with your arrow keys on the keyboard too.