From Tsunami-Induced Scour to Critical Infrastructure Failure: Insights from Hydrodynamic and Cascading Consequences Modeling for Newport

Tsunamis in Cascadia not only flood coastlines—they reshape them. Supported by the CLiP, CoPes, and CRESCENT projects, we integrate sediment transport, morphological change, and hybrid-environment interactions into high-resolution Delft3D-FM simulations for Newport Port and surrounding areas. Early results show scour depths exceeding 4 m at jetty toes, rapid undercutting of bridge piles, and exposure of buried lifelines within minutes—threatening operations and triggering cascading failures such as navigation loss and utility outages. These findings demonstrate how morphodynamics can amplify tsunami impacts. By coupling hydrodynamic and cascading-consequence modeling, we provide actionable hazard maps and stability metrics to strengthen port resilience and guide emergency planning.