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One of the problems contractors often face when installing a flume in a concrete manhole is forming the transitions into / out of the flume.  Done poorly and the result is a flume that either experiences turbulence or submergence – both which will seriously compromise…

Openchannelflow manufactures fiberglass Parshall flumes in sizes from 1 inch to 12 feet.  Constructed of premium isophthalic polyester resin, Openchannelflow’s Parshall flumes conform to ASTM D1941-91, ISO 9826:1992, JIS B7553, and the Bureau of Reclamation’s…

Putting a flume in really isn't that hard.  You can really break down it down into five steps:  Orienting the flume Siting the flume Securing the flume Cribbing the flume Backfilling

Reduced height flumes provide a convenient solution to applications where the anticipated flows at a site do not warrant a large flume, but where the flow channel is wider than can otherwise easily / economically accommodate a smaller flume.  Commonly found in water rights…

Unless you use or put in flumes for a living, you may not be familiar with the layout of a typical flume installation.   The components of most flume installations are:  the flume (naturally), the sensor, and the flow meter.

The traditional method of measuring wastewater flows is through the use of a flume and an ultrasonic flow meter in a flow manhole (concrete vault / manhole or fiberglass packaged metering manhole).  The combination is reliable and usually requires low maintenance.

We've collected a series of photos exclusively showing fiberglass Parshall flumes in a variety of different sizes.  We're visual people and prefer pictures over words.   We hope you do to!

When investigating a flume’s operation, one thing to look for is the presence of submergence.  Certain visual clues can help an operator to make informed assumptions regarding a flume’s performance. Remember that submergence doesn’t only occur at higher…

Sometimes we come across an installation in the field were we want to show you have others have solved problems that you may be wrestling with.  On a recent site visit, a customer showed us a discharge chute that they had developed to minimize erosion downstream of their…

Openchannelflow is please to announce the addition of a new section to the web site:  Palmer-Bowlus Flumes!   The section wil be full of the same high quality research and information on Palmer-Bowlus flumes that you have come to expect from our other flume products,…

In our recent series …Ways to Screw Up a Flume Installation we highlighted some of the more common (or comical) ways we have seen flume installations go awry.  Now we’d like to show you some of the ones that were done right.