Japan Geoscience Union Meeting 2015

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Symbol H (Human Geosciences) » H-DS Disaster geosciences

[H-DS27] Tsunami and Tsunami Forecast

Wed. May 27, 2015 9:30 AM - 10:45 AM A04 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Yutaka Hayashi(Meteorological Research Institute), Yuichi Namegaya(Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Chair:Narumi Takahashi(Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology)

10:00 AM - 10:15 AM

[HDS27-03] A tsunami propagation modeling based on the adaptive mesh refinement

*Takahiro MAEDA1, Shin AOI1, Asako IWAKI1, Toshihiko HAYAKAWA2 (1.NIED, 2.Mitsubishi Space Software Co.,ltd.)

Keywords:tsunami, simulation, adaptive mesh refinement, tree-structure grid

For the efficient tsunami modeling, reduction of grid number is effective. It is important to construct the most suitable grid spacing according to the topography of the seabed and to connect the grids appropriately because the grid spacing depends on a propagation speed of tsunamis. A nesting is usually employed as the method to connect the grids and is suitable for the tsunami modeling for specific area. However, it is necessary to calculate several times to cover up a wider area in case of large tsunamis like the 2011 Tohoku tsunami. In this study, we employ the adaptive mesh refinement (AMR) by discretizing a domain spatially using tree-structure grid automatically based on the CFL condition.