Estimated Flooding Area of Kawarada River Caused by Oku-Noto Heavy Rainfall Based on Real-Time Vehicle Traffic Information

Key Points

• This research aims to estimate flooding areas in the Kawarada River basin during heavy rainfall events and validate estimation accuracy.
• Real-time vehicle traffic data was analyzed to estimate flooding areas.
• Field surveys of flood conditions were conducted.
• Flood simulation was performed and compared with collected data.
• Social media information on flooding was collected and analyzed.
• Several confidence thresholds for vehicle count data were examined.
• Estimations were compared with actual flood analysis results.
• The method demonstrated a certain level of estimation accuracy during peak flooding times.