2023 Volume 42 Issue 3 Pages 213-224
Many facilities of the authors' university were damaged by the inundation due to 2019 Typhoon Hagibis. This inundation damage was due to the same reasons as in areas around the Tama River that were damaged by inland flooding, such as the rules for operating sluice gates and pipes. Furthermore, the phenomenon was complicated by the unique problem of nonoperating sluice gates in the area. The authors carried out a survey of inundation depths in the area surrounding the university soon after 2019 Typhoon Hagibis and were able to obtain an under-standing of inundation damage due to inland flooding. However, only pieces of information on the process of inundation were available. In this study, we measured the inundation depth, flow direction and velocity in a time histories using several security videos taken in this area. As a results, the characteristics of inundation in this area at the time of inland flooding are discussed.
