2024-03-29T11:34:17Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00009112
2022-12-13T02:19:31Z
1:86
岩河床河川における覆礫厚が自由砂州形状に及ぼす影響
THE EFFECT OF BEDROCK COVER THICKNESS ON FREE BAR MORPHOLOGY IN ROCK BED RIVER
渡邊, 康玄
ワタナベ, ヤスハル
WATANABE, Yasuharu
北見工業大学
矢野, 雅昭
YANO, Masaaki
井上, 卓也
INOUE, Takuya
山口, 里実
YAMAGUCHI, Satomi
渡邉, 和好
WATANABE, Kazuyoshi
平井 康幸
HIRAI, Yasuyuki
open access
To elucidate influence of bedrock cover thickness on bar morphology in free bar generating condition, we conducted hydraulic experiments. We changed bed material thickness (less and enough for fully grown bar height) and bedload feed rate (equilibrium state and 30% of equilibrium state). The results showed that bedrock exposures around bar fronts were stretched in the case bedrock cover thickness is thinner than fully grown bar height. But, in the case bedrock cover thickness is same as fully grown bar height, the exposures were not stretched. We assumed that easiness of bedrock exposer by bed material erosion and exposure rate at bar formed time related to the occurrence of exposure stretch. In the combined condition case of enough bed material thickness for bar height growth and 30% of equilibrium bedload feed, the exposure rate was not increased during experiment.
土木学会
2015
jpn
journal article
VoR
https://kitami-it.repo.nii.ac.jp/records/9112
AN10426673
https://doi.org/10.2208/jscejhe.71.I_1003
130005123466
1880-8751
土木学会論文集B1(水工学)
71
4
I_1003
I_1008
https://kitami-it.repo.nii.ac.jp/record/9112/files/doboku_B1,71,4,I_1003-1008.pdf
application/pdf
5 MB
2021-03-31