Ground failure caused by the 2011 Off The Pacific Coast of Tohoku Earthquake in the Inland of Northeast Japan and the Land History Survey

• Project/Area Number: 24501285
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geography
• Research Institution: Yamagata University (2013-2014); Fukushima University (2012)
• Principal Investigator: AKOJIMA Isao 山形大学, 人文学部, 名誉教授 (00035338)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 地盤災害 / 自然災害 / 防災 / 地震 / 土砂災害 / 国土保全 / 土地履歴 / 造成地盤 / 地震災害

Outline of Final Research Achievements

Many land collapse occurred selectively in the residential lot formed by filling the valley in the hilly area during 2011.3.11 Mega-earthquake (M.9.0) off the Pacific Coast of Tohoku District of Japan. The underground structure of artificially filled land of valley is not so different from the structure of natural landslide and it may be called "man-made landslide lot". There were some cases that the cracks reappeared in the just place where was damaged in 1978 Offshore of Miyagi Prefecture Earthquake (M.7.8). The digital maps of earth fill thickness had been made based on the old and new hand drawn topographic maps but it requires costs.
The easy and cost-free method to detect the filled part in the constructed lands is a stereo viewing of aerial photographs before the land construction on which the current topographic map image is superimposed. The method was tested based on the ground survey and got good result in practical use.

Research Products

• [Journal Article] 福島盆地東縁断層による河成段丘面の変形 (2013)
  • Author(s): 中村 洋介・阿子島 功・柴崎 直明・三村 悟
  • Journal Title: 福島大学うつくしまふくしま未来支援センター平成24年度年報 Volume: 平成24年度版 Pages: 81-86
• [Presentation] 2011.3.11東北地方太平洋沖地震による被災造成地の前地形の簡易な読み方 (2015)
  • Author(s): 阿子島 功
  • Organizer: 日本地理学会
  • Place of Presentation: 日本大学文理学部 東京
  • Year and Date: 2015-03-28 – 2015-03-30
• [Presentation] 2011.3.11東北地方太平洋沖地震による地盤災害(5) (2014)
  • Author(s): 阿子島 功
  • Organizer: 東北地理学会
  • Place of Presentation: 山形大学
  • Year and Date: 2014-10-11 – 2014-10-12
• [Presentation] 2011.3.11東北地方太平洋沖地震による地盤災害（4) (2014)
  • Author(s): 阿子島 功
  • Organizer: 東北地理学会
  • Place of Presentation: 仙台市
• [Presentation] 2011.3.11東北地方太平洋沖地震による福島県須賀川市の河岸段丘面上の地盤災害と中世城館の埋没濠遺構 (2013)
  • Author(s): 阿子島 功
  • Organizer: 日本地理学会2013年春季大会
  • Place of Presentation: 立正大学熊谷キャンパス
• [Presentation] Man-made Groud Failure caused by The 2011 Off The Pacific Coast of Tohoku Earthquake in the inland of Northeast Japan (2012)
  • Author(s): AKOJIMA Isao
  • Organizer: 7th China-Japan-Korea Joint Conference on Geography,
  • Place of Presentation: 東北師範大学、長春市、中国
• [Presentation] 2011.3.11東北地方太平洋沖地震による地盤災害（3） (2012)
  • Author(s): 阿子島 功
  • Organizer: 東北地理学会2012年秋季大会
  • Place of Presentation: 秋田大学