Abstract
The Tehama-Colusa Canal Authority (TCCA) has been using SonTek Doppler flow meters at approximately 30 installations for about 3 years. TCCA is located in northern California with its headquarters in Willows. The Cal Poly ITRC compared the accuracy of the flow measurement readings from the new Doppler flow meters to the venturi meters that were installed by the US Bureau of Reclamation (USBR). The venturis were used as the historical standard for flow measurement for TCCA. TCCA has opted to move away from the existing technology for a variety of reasons, especially due to the issue concerning access requirements for an enclosed space. TCCA has opted to use the Doppler meter as the replacement. In past studies, ITRC has used the R-Squared statistic to set the minimum number of data points for calibration. This paper evaluates the technique used by USGS to report the calibration of a meter.
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