Study on Rainfall-Runoff and Flooding in Yatsu Topography of the Ichinomiya River Basin Based on Field Measurement and Numerical Simulation

Key Points

• This study aims to analyze the rainfall-runoff and flooding characteristics of Yatsu topography in the Ichinomiya River Basin.
• Conducted field measurements to observe runoff characteristics in two Yatsu basins
• Assessed land use and waterway maintenance conditions
• Utilized RRI-RF model for numerical simulations of rainfall runoff phenomena
• Differences in runoff characteristics were observed due to varying levels of Yatsu field maintenance
• Differences in waterway distribution impacted the effects of water collection and drainage in the basins