Hydraulic Efficiency of Continuous Transverse Grates for Paved Areas
Publication: Journal of Irrigation and Drainage Engineering
Volume 135, Issue 2
Abstract
The hydraulic behavior of several continuous transverse gully grates is studied. Their use is common in some urban or impervious areas (squares, airport pavements, parks, pedestrian areas, etc.) where isolated inlets turn out to be ineffective in collecting the whole runoff into the sewer system during a storm event. Normally, manufacturers of such structures provide information about the bearing capacity, but little concerning their hydraulic behavior. Some grates with various widths were tested at the Technical University of Catalonia hydraulic laboratory for different approach flows and a large set of longitudinal slopes. Experimental equations were obtained to relate hydraulic efficiency of these structures to some relevant flow parameters such as the Froude number and the hydraulic depth. The first equation achieved may be used as a first approach to design a surface drainage system considering a constant circulating flow, whereas the second expression does not depend on flow values and could be used in storm-water and wastewater software packages to design surface drainage systems and for dual drainage modeling.
Get full access to this article
View all available purchase options and get full access to this article.
References
ASCE. (1992). Design and construction of urban stormwater management system, New York.
Brown, S. A., Stein, S. M., and Warner, J. C. (1996). “Urban drainage design manual, hydraulic engineering”. Circular No. 22, FHA, U.S. Dept. of Transportation, Washington, D.C.
Butler, D., and Davies, J. W. (2004). Urban drainage, 2nd Ed., Spon Press, London.
Denver Council of Governments (DCG). (1969). Urban storm drainage criteria manual, Wright-Mclaughlin Engineers, Denver.
European Committee for Standardization (ECS). (1994). “Gully tops and manhole tops for vehicular and pedestrian area. Design requirements, type testing, marking, quality control.” EN 124, approved by the ECS in 1994 and entered in force on April 20, 1995.
European Committee for Standardisation (ECS). (2002). “Drainage channels for vehicular and pedestrian areas. Classification, design and testing requirements, marking and evaluation of conformity.” EN 1433, approved by the ECS in 2002 and entered in force in June, 2003.
Gómez, M., and Russo, B. (2005a). “Comparative study among different methodologies to determine storm sewer inlet efficiency from test data.” 10th Int. Conf. on Urban Drainage, Institute of Environment and Resources, Technical Univ. of Denmark, Copenhagen, Denmark, ⟨http://www.env.dtu.dk/English/Publications.aspx⟩.
Gómez, M., and Russo, B. (2005b). “Hídráulica de los sistemas de captación con rejillas transversales continuas y canaletas de desagüe.” XXII Congr. Latinoamericano de Hidráulica, Sociedad Venezolana de Ingeniería Hidráulica, Ciudad de Guayana, Venezuela, 448–449.
Gómez, M., Sánchez, H., Malgrat, P., Castillo, F., Sunyer, D., and Nanía, L. (2002). “Inlet spacing considering the risk associated to runoff: Application to streets and critical points of the City of Barcelona.” Urban Drainage 2002: Global Solutions for Urban Drainage, 9th Int. Conf. on Urban Drainage (9ICUD), E. W. Strecker and W. C. Huber, eds., ASCE, Environmental and Water Resources Institute, Urban Water Resources Council, The International Association for Hydraulic Research, and The International Water Association, Joint Committee on Urban Drainage, Portland, Ore., 353–354.
Neenah Foundry Company (NFCO). (1998). “Inlet grate capacity.” Construction Castings, Catalog—R, 12th Ed., Engineering Laboratory Design, Inc.
Spaliviero, F., and May, R. W. P. (1998). “Spacing of road gullies. Hydraulic performance of BS EN 124 gully gratings.” Internal Rep., HR Wallingford, Wallingford, U.K.
Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 135 • Issue 2 • April 2009
Pages: 225 - 230
Copyright
© 2009 ASCE.
History
Received: Feb 6, 2008
Accepted: Jul 14, 2008
Published online: Apr 1, 2009
Published in print: Apr 2009
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.