Conference Agenda

A large-scale 1D/2D coupled model is being developed for the Barcelona Metropolitan Area. It aims to enhance the urban flood modeling capabilities for the region as a tool to improve preparedness against flash flood risks. The model employs a hybrid approach to runoff routing, integrating both semi-distributed and fully distributed methods to accurately simulate runoff behavior in urbanized environments. Key elements include the representation of drainage systems, particularly the role of grate inlets, which facilitate water exchange between different domains. The model generates flood maps that depict water depth and velocity allowing to quantify the damage on infrastructure and services, including direct and indirect tangible impacts as well as intangible risk for people. A significant challenge addressed in this research is the data gap in sewer network information, as only 25 out of 36 municipalities have available data. To overcome this limitation, a synthetic sewer network generation methodology has been developed, utilizing geographic information and structural parameters to approximate sewer layouts. This innovative data gap filling methodology enhances the possibility to develop 1D/2D coupled models under scarce data conditions. The methodology has been tested with satisfactory results in a municipality of the area of study.