The Irrigation Training and Research Center (ITRC) is currently testing several non-contact volumetric flow meter models under their technical services contracts with the California Department of Water Resources (DWR) and the United States Bureau of Reclamation (USBR). In April 2020, a Sommer RQ-30A non-contact flow meter was installed at Banta Carbona Irrigation Districts (BCID) Main Canal approximately 180 ft downstream of the discharge from Pumping Plant 1. The meter was mounted at midspan along a footbridge that crosses the throat of an ITRC designed subcritical contraction structure (see Figure 1). An existing SonTek Acoustic Doppler Flow Meter (ADFM) was installed on the invert of the structure and positioned directly beneath the non-contact meter installation. After the initial installation, current metering was performed to gauge the “out-of-the-box” accuracy of the RQ-30A sensor. Over the course of the study, ITRC periodically performed current metering using a SonTek RiverSurveyor M9 to evaluate the accuracy of SonTek ADFM. The SonTek ADFM was used as the standard device for comparing the non-contact meter measurements.


Bioresource and Agricultural Engineering

Number of Pages



URL: https://digitalcommons.calpoly.edu/bae_fac/117