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*Kakeru Ohkura
Graduate Student, Environmental System Engineering, Nagaoka University of Technology
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Toshiro Kumakura
Associate Prof., The Dept. of Civil and Environmental Engineering, Nagaoka University of Technology
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Satoru Yamaguchi
Snow and Ice Research Center, National Reserch Institute for Earth Science and Disaster Prevention
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Sento Nakai
Snow and Ice Research Center, National Reserch Institute for Earth Science and Disaster Prevention