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oai:kitami-it.repo.nii.ac.jp:00008450 2026-02-17T02:30:40Z 1:86

アンカーアイスが結氷河川の物質循環に与える影響 THE INFLUENCE OF ANCHOR ICE ON MATERIAL CIRCULATION IN THE ICE-COVERED RIVER 鈴木, 広卓 橋場, 雅弘 吉川, 泰弘 黒田, 保孝 anchor ice ice-covered river material circulation This study was conducted to clarify the mechanism of anchor ice formation on the river bed and to understand the impact of anchor ice on material transport in ice-covered river. Field observations indicated that anchor ice formation was significantly affected by the air temperatures and water temperatures as well as by the hydraulic conditions, such as the water depth and the flow velocity. We tried to simulate anchor ice formation in the actual river. The simulation results showed that accurate estimation of the temperature of river bed material that incorporated the influence of solar radiation and ground heat was critical for enhancing calculation precision. We could estimate that the anchor ice pulled away the algae from the river bed and flushed them to downstream, similar to a bed load transport in summer flood. This study proved that the river used for simulation had a specific material circulation due to frazil ice and anchor ice. journal article 公益社団法人　土木学会 2015-06 application/pdf 河川技術論文集 21 49 54 2436-6714 https://kitami-it.repo.nii.ac.jp/record/8450/files/2015-06_アンカーアイスが結氷河川の物質循環に与える影響.pdf https://kitami-it.repo.nii.ac.jp/records/8450 jpn c 2015 公益社団法人　土木学会 open access