Damage Conditions to Reinforced Concrete Buildings and Coastal Black Pine Trees in the 2011 Off the Pacific Coast of Tohoku Earthquake Tsunami

Matsutomi, Hideo; Yamaguchi, Eriko; Naoe, Kazunori; Harada, Kenji

doi:10.2208/kaigan.68.i_351

Cited by 2 publications

(1 citation statement)

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“…However, such structures obstruct access to the sea, causing great inconvenience to cities with local communities that are mainly reliant on marine product industries. Some reports have suggested that large buildings protected the houses behind them from tsunami impact (e.g., Matsutomi et al, 2012;Takagi et al, 2014). Therefore, the effects of building arrays along the coast on controlling the flood flow instead of a continuous seawall were tested numerically.…”

Section: Tsunami Reduction Effects Of Concrete Buildings Along the Coastmentioning

confidence: 99%

High-resolution modeling of tsunami run-up flooding: a case study of flooding in Kamaishi city, Japan, induced by the 2011 Tohoku tsunami

Akoh

Ishikawa

Kojima³

et al. 2017

Nat. Hazards Earth Syst. Sci.

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Abstract. Run-up processes of the 2011 Tohoku tsunami into the city of Kamaishi, Japan, were simulated numerically using 2-D shallow water equations with a new treatment of building footprints. The model imposes an internal hydraulic condition of permeable and impermeable walls at the building footprint outline on unstructured triangular meshes. Digital data of the building footprint approximated by polygons were overlaid on a 1.0 m resolution terrain model. The hydraulic boundary conditions were ascertained using conventional tsunami propagation calculation from the seismic center to nearshore areas. Run-up flow calculations were conducted under the same hydraulic conditions for several cases having different building permeabilities. Comparison of computation results with field data suggests that the case with a small amount of wall permeability gives better agreement than the case with impermeable condition. Spatial mapping of an indicator for run-up flow intensity (IF = (hU2)max, where h and U respectively denote the inundation depth and flow velocity during the flood, shows fairly good correlation with the distribution of houses destroyed by flooding. As a possible mitigation measure, the influence of the buildings on the flow was assessed using a numerical experiment for solid buildings arrayed alternately in two lines along the coast. Results show that the buildings can prevent seawater from flowing straight to the city center while maintaining access to the sea.

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Section: Tsunami Reduction Effects Of Concrete Buildings Along the Coastmentioning

confidence: 99%

High-resolution modeling of tsunami run-up flooding: a case study of flooding in Kamaishi city, Japan, induced by the 2011 Tohoku tsunami

Akoh

Ishikawa

Kojima³

et al. 2017

Nat. Hazards Earth Syst. Sci.

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The Role of Buildings in Disaster Risk Reduction: Focusing on the Great East Japan Earthquake

Pushpalal

2014

Procedia Economics and Finance

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Damage Conditions to Reinforced Concrete Buildings and Coastal Black Pine Trees in the 2011 Off the Pacific Coast of Tohoku Earthquake Tsunami

Cited by 2 publications

References 1 publication

High-resolution modeling of tsunami run-up flooding: a case study of flooding in Kamaishi city, Japan, induced by the 2011 Tohoku tsunami

High-resolution modeling of tsunami run-up flooding: a case study of flooding in Kamaishi city, Japan, induced by the 2011 Tohoku tsunami

The Role of Buildings in Disaster Risk Reduction: Focusing on the Great East Japan Earthquake

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