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Velocity Indexing Methods

In the majority of situations velocity index methods are essential to the acquisition of high quality flow data when using continuous velocity devices. These include acoustic Doppler, echo correlation, radar and transit time ultrasonic systems.

Velocity index methods are based on deriving a relationship between the mean channel velocity and the velocity measured by the instrument. The average velocity is combined with area, obtained using stage and channel cross section, to provide continuous flow measurement. 

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