2024-03-29T13:00:59Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00007761
2022-12-13T02:21:09Z
1:86
北海道太平洋岸地域で発生した河川津波に伴う漂流氷板の寸法計測
Measuring the Sizes of Drifting Ice Floes Caused by Tsunami Propagating up the Rivers in Pacific Coastal Areas of Hokkaido
Measuring the Sizes of Drifting Ice Floes Caused by Tsunami Propagating up the Rivers in Pacific Coastal Areas of Hokkaido
阿部, 孝章
吉川, 泰弘
平井, 康幸
open access
c 2012 公益社団法人 土木学会
In Hokkaido, Northern Japan, the tsunami of 2011 Tohoku Pacific-Coast Earthquake broke river ice and transported thousands of meter-long ice floes in rivers whose mouths are on the Pacific Coast. The objectives of this study are to investigate sizes and areas of ice floes by using photographs obtained during the field survey conducted after the tsunami and, on that basis, to estimate the masses of floes transported by the tsunami. Sizes and areas of them were measured using an image analysis technique and ice thicknesses are measured on site. In an extreme case, the estimated masses were approximately 1.2 to 20 ton on average and 5.0 to 170 ton as maximums of floes retained near the bridge piers. This work highlights the potential risks of ice floes, which can be hazardous to river structures such as bridge piers.
公益社団法人 土木学会
2012
jpn
journal article
VoR
https://kitami-it.repo.nii.ac.jp/records/7761
http://doi.org/10.2208/kaigan.68.I_1436
土木学会論文集B2(海岸工学)
68
2
I_1436
I_1440
https://kitami-it.repo.nii.ac.jp/record/7761/files/2012-11_北海道太平洋岸地域で発生した河川津波に伴う漂流氷板の寸法計測.pdf
application/pdf
2.9 MB
2016-11-22