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Fiberglass packaged metering manholes are an innovative solution to the problem of needing to measure piped flow below grade. Packaged metering manholes factory integrate a flow element (usually a flume, but weirs and magnetic flow meters can also be integrated) directly into a…

Fiberglass Parshall flumes are the standard for measuring influent and effluent flows at wastewater treatment plants (WWTPs) in North America.  Widely used in surface water / irrigation applications, the Parshall flume adapts well to sanitary applications while fiberglass…

The traditional method of connecting Parshall flumes to piping has been through the use of end adapters.   Unfortunately, industry-wide the end adapters currently offered by Parshall flume manufacutrers take a number of short cuts in bringing flow into their Parshall flumes.…

Once found only at wastewater treatment plants, fiberglass Parshall flumes have spread to a variety of applications where other materials have traditionally held sway.  The shift from traditional materials like concrete, mild steel, and wood – all used during the…

When evaluating among flume manufacturers and their offering there are a number of things as a contractor that you need to consider. We've broken what you need to look for down into (8) catagories: Cost Construction Expertise Focus Lead-times Submittals Support Warranty

In our series on Selecting a Primary Device we looked at:  Choosing Between a Weir and a Flume and Choosing a Weir or Flume Style.  In this closing article we now look at sizing a weir or flume. The basic consideration in sizing a particular style of weir or flume…

In the first article of this series on Selecting a Primary Device we discussed criteria that can be used to select between a weir and a flume.  Now our attention turns to selecting a particular style of weir or flume. The choice of device style is normally dictated by the…

The selection of a primary device (weir or flume) for a particular open channel flow application typically can be broken down into three decisions: First – should a weir or a flume be used? Second – which style of weir or flume should be used? Third – which size…

One advantage of using the Parshall flume to measure open channel flow is that the layout and dimensions of the flume are standardized.  For the range of sizes normally encountered in the field, the sidewalls heights of Parshall flumes are fixed and are: 24-inches [60.96 cm]…

Researchers (both public and private) use instrumented turf plots in order to better understand the varieties of turf grasses, their ability to capture nutrients (nitrogen and phosphorous), the release rate of those nutrients, and optimal watering cycles.  A key component of…

The Parshall flume is the most common type of flume used for monitoring industrial discharges.  The ubiquity of the Parshall flume means that it is usually well understood by pretreatment inspectors and industrial users alike – not an insignificant consideration…