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The freeboard is the difference in height between the top of a flume or weir and the highest water level anticipated. Freeboard is a guard against overtopping by waves, unexpected rises in the water level, or miscalculation in the maximum anticipated flows. Freeboard is also…

While not as varied as H flumes are in terms of their mounted, Parshall flumes can be installed in a number of creative ways to meet your flow measurement needs. Versitle in instalation and widely used, the Parshall flume is most famous of the short throated class of flumes and…

In terms of installation and mounting, one of the most versatile flumes is the H Flume. This versatality in installation, combined with a wide range of styles and sizes, make the H flume one of the most popular flumes to meausre water and wastewater flows.

During periods of rapid water level change, the level in a stilling well may lag behind those in the channel that it is measuring. This phenomenon is known as stilling well lag and is a result of head loss in the intake system. Stilling well lag may occur when the water level in…

From time to time, Openchannelflow comes across videos, discussions, or other information that we think may be useful for our readers. Keep in mind that while we present this information for your review,

Location: Shaver's Creek Environmental Center, Petersburg, PA, USA Applicaton: Watershed runoff flow monitoring and characterization

The purpose of a Parshall flume is to measure the flow of water in an open channel (or non-pressurized pipe). This water can be from a variety of sources, including: rivers, streams, canals, channels, field runoff, mine discharge, dam seepage, springs, wastewater, and industrial…

One of the most common uses for flumes is to measure the flow of sewage though collection systems. While we may tout the advantages of Packaged Metering Manholes - and they are considerable - the higher initial cost means that when an existing manhole is available, a flume is…

Parshall Flumes are a class of short throated flumes. Originally developed in the 1920's, the Parshall Flume has become the most researched style of flume leading to its wide acceptance and use in a variety of applications.

On the face of it, the H flume looks to be a good choice when selecting a device to measure storm water flows. At its core, a H flume is a hybrid device: a combination of a flume and a weir – melding the best of each into a single device. The flume has a wide turndown ratio…

Measuring storm water presents difficulties that other applications don’t usually experience.

In our blogs, we frequently highlight our abilities as a manufacturer of primary devices, including Parshall flumes, for the devices for the measurement, conditioning, and control of water in open channels. But what does it mean to be a manufacturer? What does it mean to be a…