Hydraulic Interaction of a Gully System
Keywords:
gully, inlets, grates, head-discharge, urban flood modelling.Abstract
This paper presents the experimental data collected in a series of tests to measure the hydraulic interaction of a typical gully inlet used in the UK. A full-scale laboratory rig was constructed at the University of Sheffield consisting of a testing platform fitted with grated inlets and a gully pot. The gully pot outlet serves both as an outfall and as an inlet to allow surcharge flow into the system. The aim of this paper is to address the shortfall in knowledge, of the flow into and from (surface and below surface) a typical gully system especially during surcharged conditions. This interaction is expressed in terms of head-discharge relationship and is important for the sewer flow simulations of urban flood prediction models. Ultimately, this information may be used by engineers and manufacturers for the design of surface drainage system and for the calibration/validation of coupled urban flood prediction models.
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