Japan Geoscience Union Meeting 2014

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Oral

Symbol H (Human Geosciences) » H-SC Social Earth Sciences & Civil/Urban System Sciences

[H-SC25_30AM1] Human environment and disaster risk

Wed. Apr 30, 2014 9:00 AM - 10:45 AM 421 (4F)

Convener:*Tatsuto Aoki(School of Regional Development Studies, Kanazawa University), Yasuhiro Suzuki(Nagoya University), Mamoru Koarai(Geographic Information Analysis Research Division, Geography and Crustal Dynamics Research Center, Geographical Survey Institute), Toshihiko Sugai(Department of Natural Environmental Studies, Institute of Environmental Studies, Graduate School of Frontier Science, The University of Tokyo), Hiroshi Une(Geospacial Information Authority of Japan), Yoichi Nakamura(Department of Earth Sciences, Utsunomiya University), Jun Matsumoto(Deaprtment of Geography, Tokyo Metropolitan University), Shintaro Goto(Department of Environmental Systems Faculty of GEO-Environmental Science Rissho University), Keitarou Hara(Faculty of Informatics, Tokyo University of Information Sciences), Chair:Tatsuto Aoki(School of Regional Development Studies, Kanazawa University)

10:15 AM - 10:30 AM

[HSC25-P06_PG] Liquefaction occurrence ratio and geomorphic conditions in the inland area caused by the Great East Japan Earthquake

3-min talk in an oral session

*Masafumi AOYAMA1 (1.Japan Map Center)

Keywords:liquefaction, geomorphic classification, former river channel and pond, landfill age, 2011 off the Pacific coast of Tohoku Earthquake

The area ratio of liquefied sites in the inland area caused by the 2011 off the Pacific coast of Tohoku Earthquake was estimated from the field survey and Google Earth images interpretation. In the Tone River lowland, the occurrence of liquefaction concentrated in the former river channel and pond, and the area ratio of liquefied sites is about 23%. The ground consisting of younger landfill age is more susceptible to liquefaction than that created by the older ones. Area ratio of Liquefied sites in the Tone River lowland is larger than the Osaki plain, Miyagi Prefecture. In the Osaki plain, the area of former river channels and ponds buried by loose sandy soils is less than the Tone River lowland.