Natsuki SATO

Study on understanding the relationship between sandy beach shape on the Uchinada Coast and occurrence of rip current

Naoyuki INUKAI

With the advance of land use, the demand as a place of oceanic recreation has increased and it is a precious space. Opportunities for people to enjoy marine leisure are increasing, and among them, swimming in the sea is being enjoyed by many people as familiar leisure. However, there are many accidents caused by water accidents during sea bathing, and serious accidents such as accidents involving fatalities every year. Ishikawa Prefecture is no exception, in recent years there are increasing beach accidents that are suspected of rip current on the Uchinada Coast. There are various factors in the beach accident, but one of them has a detached .Rip current is a strong flow toward mid sea, and it is considered that the main cause is the topography and wave condition.
Therefore, in order to grasp the occurrence factors of the rip current including the prevention of the accident related to the rip current on the Uchinada Coast, the data by NOWPHAS Kanazawa Port rip current data and the Hokuriku Regional Development Bureau Kanazawa Port and Airport Development Office Estimated wave characteristics using wave observation data.
We will grasp the length of the offshore flow from the flow velocity and the wave condition of the detached flow occurring on the Uchinada Coast and make it possible to estimate the location of the offshore flow generation site and the flow velocity of the offshore flow etc. from the wave situation together with the past research Aimed at.
It is possible to estimate the flow velocity on the coast of the Uchinada Coast from the estimation formula. It also showed that there is a possibility that the length of the rip current may be suddenly increased by the wave condition.