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For a short-throated flume to accurately measure flow, it is desirable to keep the flume’s dimensions with +/-2% of nominal. But what happens when they aren’t? For Rectangular Cutthroat Flumes, investigations have shown that corrects for throat width can be made.

The Parshall flume is a fixed hydraulic structure originally developed to measure surface water and irrigation flows. Recently, research has been conducted to see if Parshall (and Venturi) flumes also provide a benefit in aerating the flow streams that they are used to measure.…

As Parshall Flumes get larger they become more restricted in their uses. The 72-inch Parshall Flume is primarily used to measure flows at treatment plants, water rights, and surface waters. Due to its size, the 72-inch Parshall Flume usually ships in two pieces. The 72-inch…

48-inch Parshall Flumes have been used over the years to measure flow in a several different applications mine dewatering, surface waters, stream, rivers, water rights, and wastewater treatment plants. The 48-inch Parshall Flume is useful in a number of applications:

The 1-inch Parshall Flume is the smallest of the 22 standard Parshall flume sizes. The small size means that it is relatively limited in its use. 1-inch Parshall Flumes cannot be used on unscreened sanitary flows as they will clog. The 3-inch Parshall Flume is the smallest…

The Extra Large 60º V Trapezoidal Flume is useful - providing good low-end accuracy while still allowing connection to larger (up to 12-inch [30.48 cm]) pipes. The flat-bottomed design and v-shaped cross section mean that the flume passes solids well. The Extra Large 60º V…

Unlike the Palmer Bowlus flume which was specifically designed to be used in-line with sewer pipes and conduits, Parshall flumes were originally developed to measure flows in irrigation channels and natural streams / rivers. Over the years, though, Parshall flumes have been…

The 24-inch Parshall Flume is a popular size of Parshall Flume for measuring surface water flows, water rights, and sanitary flows at treatment plants. The 24-inch Parshall Flume can be useful in a number of applications, including:

The 3-inch Parshall Flume is one of the last flumes developed in the Parshall series. The flume can be used equally well to measure sanitary flows as well as surface waters. It is important to note that the 3-inch Parshall flume is the smallest Parshall Flume size that can be…

The 9-inch Parshall Flume is a popular size in the Parshall Flume family. It is equally at home measuring surface waters, wastewater flows, and water rights. The 9-inch Parshall Flume is useful in a number of applications, including:

The 12-inch Parshall Flume is one of the most popular sizes of the Parshall Flume family. The flume is equally at home measuring sanitary wastewater at a municipal treatment plant as it is measuring water rights on The Western Slope. The flume is regularly used to measure the…

For years Openchannelflow has offered staff gauges integrated into our flume, weir, and manhole products. Over time, though, we have been asked to expand our offerings to include free-standing Staff (Level) Gauges.