| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
The land condition and land history of the liquefied area due to the recent earthquake were clarified. There were many areas located on the past gravel pits in the area that was considered to be the liquefaction occurrence in the natural ground of the 2011 Tohoku Earthquake. It was suggested that small rivers or waterways existed until the Edo period in the zonal liquefaction concentrated area that appeared during the 2016 Kumamoto earthquake. The liquefaction occurrence area in Kiyota Ward, Sapporo City, during the 2018 Hokkaido Eastern Iburi Earthquake was the valley embankment area that was created in the hilly area since the 1980s. Most of the liquefaction areas caused by recent earthquakes have a history of artificial land modification, and the liquefaction vulnerability of artificial ground such as buried soil in river and valley topography and backfill soil in mined areas is high.
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