00000nam 2200000zi 4500 9.870420 CaOODSP 20241203113647 m o d f cr ||||||||||| 190322e198707##oncad #ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre En13-5/87-139E-PDF Marsalek, J., author. Head losses at manholes with a 90° bend / by J. Marsalek and B.J. Greck. Burlington, Ontario, Canada : National Water Research Institute, Rivers Research Branch, Canada Centre for Inland Waters ; Brampton, Ontario, Canada : Paul Theil Associates Limited, July 1987. 1 online resource (26 pages, 8 unnumbered pages) : illustrations, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 87-139 "RRB-87-32." "This manuscript has been prepared for the Canadian Journal of Civil Engineering." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Head and pressure changes were studied at manholes with a 90° bend. For pressurized flow, such changes depended only on junction geometry. Among junction parameters, the benching was found particularly important. Full benchings reaching to the pipe crown produced the lowest head losses, particularly when combined with an enlarged pipe diameter at the junction. Head changes in open-channel flow were significantly smaller than those in pressurized flow"--Abstract, page 2. Includes a management perspective and abstract in English and French. gccst Water supply Sewer design Manholes Greck, B. J., author. Canada. Environment Canada. National Water Research Institute (Canada). Rivers Research Branch. Canada Centre for Inland Waters. Paul Theil Associates. NWRI contribution ; 87-139. (CaOODSP)9.844121 PDF 1.77 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-87-139-eng.pdf