The wave propagation process caused by the penetration of long-period waves into the mouth was investigated through field investigation, taking the Segami River flowing into Hitachi Port in Ibaraki Prefecture as an example. Five wave gauges and current meters were installed around the river mouth and in the river in September, 2002. Long-period waves were measured during two typhoons and one storm. Long-period waves of the period 100-120s selectively invaded the river channel and wave amplitude increased two times that of the river mouth. Numerical simulation was carried out in order to reproduce the long-period waves and to examine measures against long-period waves. As a result, the effectiveness of the pond damping the long-period waves was confirmed.
In the Segami River flowing into Hitachi Port facing the Pacific Ocean, swell waves with solitons in front often propagate from the river mouth, causing the inundation damages. These damages are closely related to the wave run-up of the long-period waves. Field observation of these long-period waves was carried out to investigate the mechanism of the propagation of long-period waves. Waves with an extraordinary long period of 1,200s, which was generated as seiche on continental shelf, were observed as well as the long period waves with the period of 100s.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.