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The traditional method of connecting Parshall flumes to piping has been through the use of end adapters. On the inlet side, the purpose of an end adapter is to expand the flow from the pipe into a channel wider than the entrance of the flume and then contract flow in a controlled…

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 initial…

Being a contractor isn’t easy. There are weather delays, subcontractors to schedule, equipment to install, progress charts to update, client meetings, and permits to obtain. The list goes on and on. You can't be an expert in everything and even many consultants don’t design…

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.

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 three…

The selection of a primary device (weir or flume) for a particular open channel flow application typically can be broken down into three decisions: In this series of articles we will discuss each decision and the criteria that can be used to make a selection. In these…

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: The exceptions here are…

As populations increase there in an increased need for water conservation and water quality preservation to extend and protect ground and surface water reserves. Yet in many urban areas, considerable amounts of water and fertilizers are used for lawn and landscaping needs.…

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 – and is well…

Time and again, we get questions on pipe slope and straight run requirements from customers looking to connect flumes to piping. For flumes with end adapters (Parshall, Palmer Bowlus, HS / H / HL, Trapezoidal, Cutthroat, and Montana), the chart below can serve as a guide.

Part of applying a flume is the selection of one flume type over another. In evaluationg between Parshall and Cutthroat flumes, understand that certain manufactuers / researchers have discourage the use of the Cutthroat flume dues due research related issues.

The H series of flumes have shown themselves to be excellent at monitoring flows in irrigation channels and even industrial discharges. One of the reasons that H flumes work so well is their ability to pass solids. Another advantage of H flumes is their ability to accurately…