00000nam 2200000zi 4500 9.877081 CaOODSP 20241203113650 m o d f cr ||||||||||| 190726e199008##oncad #ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- n-us--- En13-5/90-142E-PDF Engel, Peter, 1938- author. Towing tank tests of the accusonic acoustic flow meter / by Peter Engel, Erwin Fast and John Todd. Burlington, Ontario : National Water Research Institute, Research and Applications Branch ; Hull, Quebec : Water Survey of Canada, August 1990. 1 online resource (iv, 33 pages, 11 unnumbered pages) : illustrations, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 90-142 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 20). "The Water Survey of Canada is in the process of acquiring a reliable, low cost, ultrasonic flow meter to measure river discharge at remote locations on a real time basis. Tests were conducted on the ACCUSONIC flow meter used by the United States Geological Survey (USGS). Analysis of the test data shows that measurements made with the USGS flow meter were lower than the reference velocity and this velocity deficit was found to increase gradually with increase in towing speed in the range from 0.6 m/s to 3.0 m/s. The reason for this cannot be determined conclusively from the present test, but is thought to be attributable to the space limitations in the towing tank and the flow meter. The low variability in velocity measurements was considered to be excellent considering the uncertainties as a result of the towing tank environment. A dimensionless flow meter coefficient was developed using dimensional analysis"--Summary, page iii. Includes summary and management perspective in English and French. gccst Hydrology gccst Scientific equipment gccst Testing Fast, Erwin, author. Todd, John, author. Canada. Environment Canada. National Water Research Institute (Canada). Research and Applications Branch. Water Survey of Canada. NWRI contribution ; 90-142. (CaOODSP)9.844121 PDF 2.76 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-90-142-eng.pdf