Proposal of Judgment Figures to Identify Occurrence Spots of Wood Accumulation, "Trouble Spots"

Key Points

• The aim is to create a simple method for identifying locations most at risk of wood accumulation causing river blockages.
• Consolidated experimental data related to ice blocks and wood accumulation.
• Developed a judgment figure for wood deposition using previously collected experimental data.
• Assessed four key data points: pier span, log length, flow concentration, and Froude number.
• Demonstrated that using the developed judgment figure allows for hazard evaluation in regards to river blockages.
• Showed that the risk of blockage can be assessed based on the presence of the four data points.