@article{oai:kitami-it.repo.nii.ac.jp:00007761,
 author = {阿部, 孝章 and 吉川, 泰弘 and 平井, 康幸},
 issue = {2},
 journal = {土木学会論文集B2(海岸工学)},
 month = {},
 note = {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.},
 pages = {I_1436--I_1440},
 title = {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},
 volume = {68},
 year = {2012}
}