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      • Validation of 2D shock capturing flood models around a surcharging manhole

        Martins, R.,Kesserwani, G.,Rubinato, M.,Lee, S.,Leandro, J.,Djordjević,, S.,Shucksmith, J. D. Informa UK (TaylorFrancis) 2017 Urban water journal Vol.14 No.9

        <P>This work offers a detailed validation of finite volume (FV) flood models in the case where horizontal floodplain flow is affected by sewer surcharge flow via a manhole. The FV numerical solution of the 2D shallow water equations is considered based on two approximate Riemann solvers, HLLC and Roe, on both quadrilateral structured and triangular unstructured mesh-types. The models are validated against a high resolution experimental data-set obtained using a physical model of a sewer system linked to a floodplain via a manhole. It was verified that the sensitivity of the models is inversely proportional to the surcharged flow/surface inflow ratio, and therefore requires more calibration from the user especially when concerned with localised modelling of sewer-to-floodplain flow. Our findings provide novel evidence that shock capturing FV-based flood models are applicable to simulate localised sewer-to-floodplain flow interaction.</P>

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