Experimental investigation of the influence of manhole grates on drainage flows in urban flooding conditions

Matteo Rubinato*, Ricardo Martins, Georges Kesserwani, Jorge Leandro, Slobodan Djordjevic, James Shucksmith

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication

Abstract

Climate change and urbanization have recently increased the number of flooding events in urban areas. Urban flood modelling tools commonly utilize the weir and orifice equations to quantify the drainage flow from the surface flood flow into a sewer system through a manhole or gully. The calculation of drainage flow exchange is a function of the surface flow depth, the geometrical properties of the manhole/gully opening and the discharge coefficient. This paper presents a series of experimental tests conducted within a unique experimental facility built in the water laboratory at the University of Sheffield that features a model sewer system linked to an urban
surface/floodplain via a scaled manhole. Tests to investigate the influence of manhole grates with different geometrical configurations on the drainage flow between surface and sewer flows have been conducted. Head-discharge relationships for six different grates are presented in addition to a fully open (i.e. no grate) condition. Discharge coefficients for each grate type have been derived based on the weir and orifice equations.
Original languageEnglish
Title of host publicationProceedings of 14th IWA/IAHR International Conference on Urban Drainage
Publication statusPublished - Sept 2017

Bibliographical note

This is an accepted manuscript of a paper presented at 14th IWA/IAHR International Conference on Urban Drainage.

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