Enhancing a tsunami evacuation simulation for a multi-scenario analysis using parallel computing

Fumiyasu Makinoshima, Fumihiko Imamura, Yoshi Abe

    Research output: Contribution to journalArticlepeer-review

    28 Citations (Scopus)

    Abstract

    The numerical investigation of tsunami evacuation is becoming a major way to assess the potential evacuation risks and consider countermeasures, but it has been mostly limited to GIS-based static analysis or macroscopic agent-based modelling due to the costs of large-scale simulations. In this paper, we propose a simplified force-based evacuation simulation model and an easy-to-implement parallelization strategy for a large-scale microscopic tsunami evacuation simulation and demonstrate its applications in an actual urban environment. First, the simulation performance was verified and validated against experimental and observational results regarding basic pedestrian movement. The test results qualitatively and quantitatively showed good agreement with real pedestrian movements. The model was then applied to a case of tsunami evacuations in Kesennuma City, where the 2011 Tohoku tsunami caused devastating damage. The model was successfully scaled up to provide urban-scale characterization. In this application, the developed simulator was implemented by a hybrid MPI/OpenMP parallelized computing technique. By utilizing the proposed model with parallel computing, we achieved an urban-scale microscopic evacuation simulation five times faster than real-time and a stochastic simulation to evaluate the uncertainty in the evacuation simulation.

    Original languageEnglish
    Pages (from-to)36-50
    Number of pages15
    JournalSimulation Modelling Practice and Theory
    Volume83
    DOIs
    Publication statusPublished - 2018 Apr

    Keywords

    • Agent-based modelling
    • Parallel computing
    • Real-time simulation
    • Tsunami evacuation

    ASJC Scopus subject areas

    • Software
    • Modelling and Simulation
    • Hardware and Architecture

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