Synthetic sewer networks for pluvial flood assessment in urban areas: A Data gap filling methodology
1D/2D coupled models are a valuable tool for urban flood modelling. However, the high data requirements to characterise the sewer network in the area of study often limit their applicability. This paper proposes a methodology to fill this data gap in the Metropolitan Area of Barcelona, where a regio...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/450846 |
| Acceso en línea: | https://hdl.handle.net/2117/450846 https://dx.doi.org/10.1002/hyp.70365 |
| Access Level: | acceso abierto |
| Palabra clave: | Pluvial floods Synthetic network Modelling Àrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària |
| Sumario: | 1D/2D coupled models are a valuable tool for urban flood modelling. However, the high data requirements to characterise the sewer network in the area of study often limit their applicability. This paper proposes a methodology to fill this data gap in the Metropolitan Area of Barcelona, where a regional-scale flooding model is being developed in the scope of Project ICARIA (https://www.icaria-project.eu). It consists of a process that allows generating synthetic sewer networks at a municipal level. Its data requirements are geographic information, usually available in open-source repositories, and a set of parameters to define the geometric characteristics of the sewer elements. This approach proposes to define such parameters based on already available information of neighbouring municipalities with similar geography and demography. The methodology was implemented in Sant Feliu de Llobregat (Barcelona, Spain), where a synthetic sewer network was generated. The network of three other municipalities was taken as a reference given their similarity to the area of study. In addition, the actual sewer network of Sant Feliu was available for this study. Both networks, real and synthetic, were used in two 1D/2D coupled models developed with the software Infoworks Ultimate (v 2025.1). The model, based on the actual sewer, was considered as the benchmark to evaluate the validity of the synthetic one. Results indicate a satisfactory degree of coincidence between the models, in terms of the network layout, characteristics, extent and location of the flooded areas for four different rain scenarios. Despite its intrinsic assumptions and limitations, this methodology has proved to be a valid alternative to address this data gap when performing preliminary flood assessments in urban areas with meshed and fully gravity-driven drainage networks. |
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