Tsunami Inundation Experiment

Oral

1277 - Numerical Modeling Of Tsunami Inundation Using Subgrid Scale Urban Roughness Parameterization

Presenting Author(s)

• AP

  Adi Prasetyo, PhD

  Head of Service Section, Coastal Engineering Division
  Research Center for Water Resources, Ministry of Public Works and Housing

Additional Author #1(s)

• NF

  Nobuki Fukui

  Graduate School of Engineering, Kyoto University

Additional Author #2(s)

• NM

  Nobuhito Mori, PhD

  Disaster Prevention Research Institute, Kyoto University

The importance of accurate numerical modeling of tsunami inundation in an urban area has realized due to 2011 Tohoku Earthquake Tsunami. Although, numerical inundation simulations using high resolution topography data (O(1m)), the medium resolution tsunami inundation model (O(10m)-O(100m)) needs and useful for tsunami hazard assessment. This study develops and validates a numerical model of tsunami inundation using upscaled urban roughness parameterization: Drag Force Model (DFM) dealing with the effect of structures as drag force acting on flow based on physical modeling. The validation of the DFM reveals that DFM can express the effect of the flow direction and inundation ratio.