2024 Volume 80 Issue 16 Article ID: 23-16166
In conventional river engineering, wind stress has been assumed to affect only the temporary increases in water level. However, as climate change progresses and super typhoons are predicted, it is necessary to review the treatment of wind in river calculations. In this study, numerical experiments were conducted on the Edo River during the flood caused by typhoon Hagibis to evaluate the effect of wind on flood flow in an actual river. In addition, long-term observations of tide levels, river water levels, and meteorological data around Tokyo Bay were also analyzed. The results indicate that not only the tide level but also the river water level rises with the increase of wind velocity. Furthermore, the numerical experiments suggest that intense wind stress causes flow velocity and water level response, and that the rise in water level during the water rising period can also affect the peak period due to the propagation of water surface waves.
