|
|||||
|
|
Validation of 2D shock capturing flood models around a surcharging manhole |
|
| Authors: | R Martins G Kesserwani M Rubinato S Lee J Leandro S Djordjevi? |
| Affiliation: | 1. Department of Civil and Structural Engineering, The University of Sheffield, Sheffield, United Kingdom;2. MARE - Marine and Environmental Sciences Centre, Department of Civil Engineering, FCT, University of Coimbra, Coimbra, Portugal;3. IMAR - Institute of Marine Research, FCT, University of Coimbra, Coimbra, Portugal;4. Climate Application Department, APEC Climate Center, Busan, Republic of Korea;5. MARE - Marine and Environmental Sciences Centre, Department of Civil Engineering, FCT, University of Coimbra, Coimbra, Portugal;6. Department of Civil, Geo and Environmental Engineering, Chair of Hydrology and River Basin Management, Technical University of Munich, Munich, Germany;7. Centre for Water Systems, University of Exeter, Exeter, United Kingdom |
| Abstract: | 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. |
| Keywords: | Floodplain flow sewer overflow dual drainage experiments approximate Riemann solvers shallow water equations quadrilateral vs triangular meshes |