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To protect flumes in above ground applications, Openchannelflow has developed a range of Fiberglass Enclosures that factory integrate small flow measuring flumes. The turnkey design allows the unit to be dropped in place and requires little in the way of site preparation.

Originally developed to provide both low-end sensitivity and wide flow, Trapezoidal flumes have expanded beyond the agricultural applications they were designed to measure a wide range of pipe flows.

The Parshall flume is the best known and most widely used primary device for monitoring water in open channels and non-full pipes. It is used to measure municpal sewage, industrial effluent, dam seepage, storm water, irrigation / agricultural flows, watersheds, and more!

While the Palmer Bowlus was specifically designed to be used in-line with sewer pipes and conduits, the developers of the flume had originally envisioned the flumes being grouted in-line. Many times, however, it makes more sense to have a watertight connection directly from the…

To calculate the discharge flow rate of a Parshall Flume several pieces of information are required: With this information and the appropriate free or submerged flow equation, the flow rate can be quickly calculated.

When comparing Cutthroat and Parshall flumes, much is made of the Cutthroat flume’s greater resistance to submergence….but is that really true?

Pressure transducers are a popular method of measuring the water level in flume or weir installations. They are used by water resource managers, engineers, and hydrologists to monitor flow rates in a range of applications, including: agriculture (runoff and water use), watersheds…

While Packaged Metering Manholes provide a turnkey, drop-in-place solution to below grade flow monitoring, not every budget can bear the cost. Many times, flow measurement has to take place in an existing manhole. However, using an existing manhole means that there are fewer…

In agricultural settings, flumes have two uses: water rights apportionment and edge-of-field monitoring. Of the two, water rights apportionment is the more common, being performed by ranchers and farmers throughout the Intermountain and West Coast regions of the US.

The 2-Inch 45º WSC (No 4) Trapezoidal Flume is primarily used to measure surface water flows, but is occasionally used to measure industrial discharges (usually in Packaged Metering Manholes). The flume's flat bottom mean and v-shaped cross-section allow the flume to pass solids…

Under free-flow conditions, short-throated flumes control flow in a region of the flume that produces curvilinear flow. As such, there is only one point of measurement at which the level-to-flow relationship holds. This primary point of measurement, Ha, occurs in the converging…

When the H flume was developed, analysis of the stage-to-discharge data showed that the flows could be characterized by three different equations: low flow, transitional flow, and main flow. Using those equations, though, was difficult in the field – and flow tables were…