Effects of High-Resolution Degital Elevation Model (Dem)and Building Footprint Ratio on Damaged Building Analysis in Kuma River Flood Simulation During the Heavy Rainfall in July 2020

Key Points

• This research aims to analyze the relationship between building damage and flood conditions, utilizing high-resolution terrain data.
• Conducted damage analysis using satellite images and post-flood aerial photos.
• Analyzed thousands of buildings in the Kuma River basin affected by heavy rainfall.
• Assessed flood simulation accuracy through high-resolution terrain data and building occupancy rates.
• High-resolution terrain data improved the accuracy of flood simulation estimates.
• Building footprint ratios significantly influenced the flood simulation outcomes.
• Analysis included 1,719 completely destroyed buildings and related flood conditions.