2024-03-28T20:05:02Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00006786
2023-01-16T03:52:14Z
320:321:322
Degradation and widening process of gravel river under the condition of no sediment supply at upstream end
土砂供給の停止による河床低下と砂礫河岸拡幅の進行過程
後藤, 孝臣
17741
Goto, Takaomi
17742
北村, 忠紀
17743
Kitamura, Tadanori
17744
辻本, 哲郎
17745
Tsujimoto, Tetsuro
17746
bank erosion
sediment transport
movable-bed model test
2D-numerical solution
Channel forming process under the condition of no sediment discharge was investigated with both flum experiments and numerical simulations. In addition to the degradation of bed-elevation, natural channel can change its width relatively within short time, in the process. The experimental results revealed that the relatively short time for channel widening firstly occurs, and then the bed-slope gradually adjusts to the static equilibrium condition with no significant change of the channel width. The numerical model to simulate the channel forming process, which is constituted by the depth-averaged 2-D flow model with the non-orthogonal boundary fitted grid system and the bed deformation model taking into account the collapse of the bed-material on side banks, can reproduce the process observed in the experiment.
journal article
土木学会
2000-02
application/pdf
水工学論文集
44
765
770
http://hdl.handle.net/2237/8447
09167374
https://nagoya.repo.nii.ac.jp/record/6786/files/Hydraulic_Eng_JSCE-44-765.pdf
jpn