2025 Volume 81 Issue 17 Article ID: 25-17186
The actual flooding of urban areas in northern Tokushima Prefecture due to the storm surge caused by the Second Muroto Typhoon in 1961 was examined by collecting victim testimonials, news footage, and official documents, as well as conducting a storm surge inundation analysis. The storm surge inundation analysis was carried out on Tokushima City and Komatsushima City. For topographical data, 5m DEM data was used, corrected with the 1/5000 National Land Base Map surveyed in 1965. Levees were considered as linear structures, and breaches were taken into account as much as possible. The outside water level was the tide level of Komatsushima Port, and inland flooding due to heavy rain was also taken into account. The actual damage at 23 locations was made clear from the testimonials and video materials. The results of the storm surge inundation analysis were able to explain well the actual flooding damage obtained from victim testimonials and news footage.
