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発表 Study of sand waves with ADCP and multi-beam echo-sounder in actual river

作成年度 2018 年度
論文名 Study of sand waves with ADCP and multi-beam echo-sounder in actual river
論文名(和訳)
論文副題
発表会 International Symposium and Exhibition on?Hydro-Environment?Sensors?and?Software
誌名 International Symposium and Exhibition on Hydro-Environment Sensors and Software
巻・号・回
発表年月日 2019/02/26 ~ 2019/03/01
所属研究室/機関名 著者名(英名)
株式会社福田水文センターMasahiro Hashiba
株式会社福田水文センター Koichi Tsuchida
国立研究開発法人 土木研究所 水工研究グループ 水文チーム Atsuhiro Yorozuya
国立研究開発法人 土木研究所 水工研究グループ 水文チーム Hiroshi Koseki
抄録
In this study, the authors conducted the multipoint measurement of riverbed by MBES and the bedload velocity by ADCP mounted on a maned-control boat during snow melting flood in Ishikari River. At the 2 section of about 40 m in a longitudinal direction, we measured bedform repeatedly in order to monitor the movement of the waves. In addition to that bed materials were sampled at 12 points by the Kumada Dredge sampler. Based on the observed results, the followings aspects were obtained. 1) Sand wave were measured which is the height/length of 0.07 m. 2) The moving speed of sand wave analyzed using the space-time image velocimetry (STIV) method. 3) Observed the sand wave and the bed shear stress showed good agreement with the curve constructed by Yalin (1978). 4)Regarding the bed load discharge, two different methods were compared. First one is the bed form migration, which is the function of the wave height and the wave speed proposed by Kikkawa et al. (1985). And second one is the method using ADCP proposed by Koseki et al (2016). Those two results show good agreement.
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