Abstract
The area around river mouth is one of the black spots for marine accidents because of the complexity of wave, current, and topography. This study intends to collect useful information about the flow field around river mouth for prevention of marine accidents. Field observations and numerical simulations on waves and currents have been conducted on the two selected sites of the mouth of Yura River, Kyoto and Sagami River, Kanagawa. From the 30-day observation at each site, data of waves and currents at flooding were obtained. Also, from the numerical simulations including wave-current interaction, some characteristics on the river mouth, such as the increase of wave height due to existence of current and the flow pattern around river mouth, have been clarified.
