proceeding

Prioritizing bridges at flood risk: a large-scale index based on overtopping and traffic impact

Michele AmaddiiDepartment of Civil and Environmental Engineering , Università degli Studi di Firenze , Florence , ItalyFrancesco Paolo DeflorioDepartment of Environmental, Land and Infrastructure Engineering (DIATI) , Polytechnic University of Turin , Turin , ItalyAmirehsan Charlang BakhtyariDepartment of Environmental, Land and Infrastructure Engineering (DIATI) , Polytechnic University of Turin , Turin , ItalyFabio CastelliDepartment of Civil and Environmental Engineering , Università degli Studi di Firenze , Florence , ItalyChiara ArrighiDepartment of Civil and Environmental Engineering , Università degli Studi di Firenze , Florence , Italy

2025en

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Litsenziya: cc-by

ABI

Annotatsiya

Bridges are critical nodes in transportation networks, carrying high traffic volumes but offering few alternative detour options.Despite their strategic importance, they remain highly vulnerable to flood-related hazards.Among the various hydrological processes, this study focuses on the overtopping phenomenon, when rising water levels exceed the bridge deck elevation.Overtopping inundates the deck, leading to indirect impacts primarily related to traffic disruption, along with cascading effects such as interruptions to emergency services, economic losses, and increased smog emissions.Furthermore, the closure of a single bridge can trigger widespread network disruption.As such, overtopping should be considered a distinct failure mode with significant system-wide consequences (Pregnolato et al., 2022).This study focuses on the development and application of a large catchment-scale hydraulic risk (R) index for bridges that jointly considers: (i) overtopping propensity as the hazard (H) source; and (ii) the impact of bridge

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