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oai:kitami-it.repo.nii.ac.jp:00009114 2026-02-25T00:52:15Z 1:86

交互砂州形成における混合粒径砂の影響に関する実験と理論 FLUME EXPERIMENTS AND LINEAR STABILITY ANALYSIS OF THE INFLUENCE OF NON-UNIFORM SEDIMENTS ON THE ALTERNATE BAR FORMATION 渡邊, 康玄 Watanabe, Yasuharu 渡邊 Watanabe 康玄 Yasuharu 矢野, 雅昭 YANO, Masaaki 山口, 里実 YAMAGUCHI, Satomi 平井 康幸 HIRAI, Yasuyuki open access alternate bar non-uniform sediment flume experiment stability analysis To elucidate alternate bar profiles and bar formation under the non-uniform sediments condition, flume experiments and linear stability analyses were conducted. The experiments results show that alternate bars profiles were disturbed in the case that discharge was reduced by 30% from the case that alternate bar were formed. Those bar profiles disturbance assumed to be caused by forming fix bars covered by coarse sediments. The experiments results also show that bar formation was not formed in some cases. Linear stability analyses results show that prominent instability at 1m bar wave length, that is one third of proper alternate bar wave length, was conformed in one of the case that alternate bar was not formed. Thereby, it was assumed that the peculiar instability restrained bar formation. 土木学会 2016 jpn journal article VoR https://kitami-it.repo.nii.ac.jp/records/9114 AN10426673 https://doi.org/10.2208/jscejhe.72.I_775 130005312139 1880-8751 土木学会論文集B1（水工学） 72 4 I_775 I_780 https://kitami-it.repo.nii.ac.jp/record/9114/files/dobokuB1,72(4),p.I_775-I_780-1.pdf application/pdf 807 KB 2021-03-31