![]() Fortunately, the Parshall design makes it easy to check whether or not you’re at the right spot. Find the Right Point of Measurementīefore you can make your measurement, you’ll need to make sure you’re measuring at the right point. You’ll want to look closer at the downstream conditions. ![]() Keep in mind as well that submergence isn’t always as easy to spot as simply seeing that your flume is underwater. Without an even velocity profile, your flow will likely be turbulent, and that will throw off all your measurements. If the flow looks disturbed rather than tranquil, that could be a serious problem. Make sure there aren’t any obstructions or debris that have fallen in, and ensure that the downstream isn’t causing the water to back up and slowly submerge the flume.ĭuring your inspection, be sure to look at the flow itself rather than just the flow channel. Your first step should be examining the upstream and downstream conditions. If something is wrong with the flow itself, it won’t do you much good to take a measurement. Perform an InspectionĮvery time you need to take a measurement using your Parshall flume, you should inspect the site and the flume itself first. Learn how to measure with a Parshall flume, and discover how easy the process can be. ![]() To get the most out of your Parshall, however, you’ll need to know how to measure it properly. It has more than a century of research, so the equations are reliable, and the design has been widely standardized. Parshall flumes are the most common and widely used flume style in the world, and that’s no accident.
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