2019 Volume 75 Issue 2 Pages I_779-I_784
We interviewed fishery operators at Tarocho Fisheries Cooperative Association and Yoshihama Fisheries Cooperative Association in Iwate prefecture who did not suffer damage such as overturning from the 2011 Earthquake off the Pacific Coast of Tohoku owing to standing out to sea. After clarifying the actual evacuation sea area, we conducted simulation of the tsunami caused by the Earthquake off the Pacific Coast of Tohoku to analyze the relation between current velocity distribution in the actual sea area and fishing boat speed.
The analytical results suggest that the sea area where the maximum tsunami current velocity is less than 1/2.5 of the boat speed can be set as an evacuation sea area. It is necessary to expand the scope of survey and make close study of the relation because the shape and size of fishing boats were different, the tsunami periods and wave height varied each other and the number of fishing boats subject to the survey was small. At all events, we inferred the sea area where the maximum tsunami current velocity was about 2.0 – 3.0/s can be set as a fishing boat evacuation area.
