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発表 Evaluation of geomorphological characteristics in a quasi-equilibrium river channel

作成年度 2020 年度
論文名 Evaluation of geomorphological characteristics in a quasi-equilibrium river channel
論文名(和訳)
論文副題
発表会 River Flow 2020 (Online)
誌名 Proceedings of River Flow 2020
巻・号・回 7 
発表年月日 2020/07/06 ~ 2020/07/10
所属研究室/機関名 著者名(英名)
ICHARMRobin K. Biswas
ICHARMShinji Egashira
ICHARMD. Harada
H. Ito
ICHARM
抄録
Present study discusses the formation process of present geomorphology and sediment size distributions of bed material of Seri River, Japan to identify the physical meanings of the data measured in a low water stage after six years of a large flood event. Numerical simulations are conducted to reproduce present channel morphology using a specified flood series based on 2013 event as well as on floods from 2014 to present. Planform of the channel shape, cross-sectional geometry, and lateral and longitudinal sediment size dis-tributions of bed material are reproduced well. Numerical results suggest that the present channel morphology is mainly determined by the flood event of 2013. The flood events from 2014 to present only contribute to small scale adjustments in sediment size distribu-tions of riverbed material, lateral and longitudinal channel geometry as well as channel planform.
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