= Parshall flume
{wiki=Parshall_flume}
A Parshall flume is a device used for measuring the flow of water in open channels. It is a tapered flume that allows for the measurement of flow rate by observing the water level (head) at a specific point within the flume. The design of the Parshall flume ensures that a specific relationship exists between the flow rate and the water level, allowing for accurate measurement without needing mechanical parts or direct flow measurement devices.
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