Flume Experiments Evaluating the Efficacy of a Large Wood Trap Featuring Horizontal Rods
1
Basin Waterworks Department, Tamano Consultants Co., Ltd., Nagoya, Aichi 461-0005, Japan
2
Department of Bio-Resources, Mie University, Tsu, Mie 514-8507, Japan
3
Water and Disaster Engineering Business Division, OYO Corporation, Saitama, Saitama 331-8688, Japan
4
Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan
5
Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305-8687, Japan
6
Department of Civil Engineering, National Defense Academy, Yokosuka, Kanagawa 219-0811, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Isabella Schalko and Volker Weitbrecht
Water 2021, 13(13), 1837; https://doi.org/10.3390/w13131837
Received: 27 April 2021 / Revised: 19 June 2021 / Accepted: 23 June 2021 / Published: 30 June 2021
(This article belongs to the Special Issue Impact of Large Wood on River Ecosystems)
Large wood (LW) disasters, which often accompany sediment-related disasters, occur worldwide. To prevent and mitigate such disasters, we developed a unique LW trap featuring horizontal rods aligned with the flow. When LW enters the trap, it is scooped up by the rods and thus separated from water and sediment. We explored trapping efficacy using a flume of slope 0.087. Water circulated at a constant rate of 1.8 L/s, LW was added to the flow, and the trapping rates were measured. We focused on the relative wood length (Lw) with respect to the horizontal rod spacing (Sr), the number of LW units supplied, and the supply rate. A longer relative length (Lw/Sr) of LW was associated with a higher trapping rate. The trapping rate was also high when the LW number or supply rate was high. The critical Lw/Sr value was 1.5; below this value, LW was not trapped. This study yields the basic information needed to design traps featuring horizontal rods to mitigate LW-related disasters.
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Keywords:
large wood (LW); LW trap; horizontal rods; flume experiment; trapping rate
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MDPI and ACS Style
Furukawa, M.; Tsutsumi, D.; Muto, H.; Uchida, T.; Suzuki, T.; Horiguchi, T. Flume Experiments Evaluating the Efficacy of a Large Wood Trap Featuring Horizontal Rods. Water 2021, 13, 1837. https://doi.org/10.3390/w13131837
AMA Style
Furukawa M, Tsutsumi D, Muto H, Uchida T, Suzuki T, Horiguchi T. Flume Experiments Evaluating the Efficacy of a Large Wood Trap Featuring Horizontal Rods. Water. 2021; 13(13):1837. https://doi.org/10.3390/w13131837
Chicago/Turabian StyleFurukawa, Mayuko, Daizo Tsutsumi, Hironori Muto, Taro Uchida, Takuro Suzuki, and Toshiyuki Horiguchi. 2021. "Flume Experiments Evaluating the Efficacy of a Large Wood Trap Featuring Horizontal Rods" Water 13, no. 13: 1837. https://doi.org/10.3390/w13131837
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