Journal
URBAN WATER JOURNAL
Volume 14, Issue 1, Pages 74-84Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/1573062X.2015.1057180
Keywords
rainfall runoff; storm water modelling; urban drainage
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This paper presents a 1D-2D dual drainage model to compute the rainfall-runoff transformation in urban environments. Overland flow in major drainage systems is modelled with the 2D shallow water equations, whereas the flow in a sewer network is computed with the 1D Saint-Venant equations using the two-component pressure approach to model pressure-flow conditions. The surface and sewer network models are linked through manholes, which allow water interchange in both directions. A new series of rainfall-runoff experiments in a real-scale physical model of a street section is used to validate the model under unsteady part-full and pressure flow conditions. The experimental measurements of water depth and discharge at several locations in a drainage network show a very satisfactory performance of the numerical model.
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