Full Session with Abstracts
The effects of extreme events such as earthquake or tsunamis are often considered in isolation and on a scenario basis. In this paper, we consider a probabilistic seismic and tsunami hazard analysis (PSTHA) coupled with a damage analysis (PSTDA) and debris forecasting to understand the risk to life safety, immediate response and population dislocation. The Cascadia Subduction Zone is considered for the multi-hazard with the impacts evaluated for the town of Seaside Oregon. The impacts consider the built environment consisting of residential and commercial structures, critical facilities, and lifeline infrastructure including roads and bridges, water networks, electric power networks, and communication. Life safety is considered for both seismic and tsunami effects, including the effect of seismic damage on the planned tsunami evacuation via an agent-based model. Debris forecasts are conducted considering the advection of the damage debris estimated from the PSTDA and are used to evaluate debris risks to critical facilities and lifelines. Finally, the PSTDA is used to estimate mortality and population dislocation as a function of seasonality and time of day.