Earthquake tsunami generation and inundation: elastic-fluid dynamics and nonlinear wave

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K17752
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: National Research Institute for Earth Science and Disaster Prevention
• Principal Investigator: Saito Tatsuhiko 国立研究開発法人防災科学技術研究所, 地震津波防災研究部門, 主任研究員 (30550933)
• Research Collaborator: HINO Ryota ; FUKUYAMA Eiichi
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 地震 / 津波 / 固体 / 流体

Outline of Final Research Achievements

A theoretical foundation was constructed for tsunami generation, propagation, and inundation. By taking the interaction between fluid and elastic medium into account, we theoretically calculated the pressure change caused by the earthquake and tsunami generation. The contributions of gravity, elasticity, and inertia force during the generation were quantitatively investigated. Moreover, based on this theoretical consequence, we proposed a new numerical method that can simulate more realistic tsunami generation in an elastic medium and the nonlinear inundation with high-resolution (~6 m) bathymetry/topography data. We synthesized the records of ocean-bottom pressure change and ocean-surface displacement together with the inundation into a city area with an anticipated huge earthquake dynamic rupture scenario in the Nankai Trough. These synthesized records are available for the measurement of the performance of our tsunami monitoring and predicting ability.

Free Research Field

地震学