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Conditional Assessment of Flow Measurement Accuracy |
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| Authors: | Bryan Heiner Steven L Barfuss Michael C Johnson |
| Affiliation: | 1Hydraulic Engineer, U.S. Dept. of Interior, Bureau of Reclamation, P.O. Box 25007 (86-68460), Denver, CO 80225-0007 (corresponding author). E-mail: bheiner@usbr.gov 2Research Assistant Professor, Utah State Univ., Dept. of Civil and Environmental Engineering, Utah Water Research Laboratory, 8200 Old Main Hill, Logan, UT 84322-8200. E-mail: steve.barfuss@usu.edu 3Research Assistant Professor, Utah State Univ., Dept. of Civil and Environmental Engineering, Utah Water Research Laboratory, 8200 Old Main Hill, Logan, UT 84322-8200. E-mail: michael.johnson@usu.edu |
| Abstract: | A study conducted by the Utah Water Research Laboratory assessed the accuracies of a wide variety of flow measurement devices currently in service. During the study, a wide variety of flow measurement devices, including flumes, weirs, and rated sections in open channel systems, were evaluated; magnetic and ultrasonic meters in closed-conduit systems were also tested. The specified design accuracies for each device are presented. Actual flow measurements were determined at 70 sites and were compared with the theoretical discharges of each device. Comparison of actual and theoretical flow indicates that only 33% of the measurement devices tested currently measure flow within manufacturer-designed specifications. Field data is presented, and possible reasons for the flow measurement errors and their corrections are discussed. |
| Keywords: | Flumes Weirs Open channel flow Flow measurement Canals Irrigation |