2018 Volume 74 Issue 2 Pages I_523-I_528
We conducted a virtual tsunami observation experiment to evaluate the tsunami detection performance of oceanographic radar in Ensyu-nada near Omaezaki with a relatively complicated submarine topography. At Hamaoka Nuclear Power Station, an oceanographic radar has been installed, and using this measured data, two cases of different tsunamis were examined. By using the virtual tsunami observation experiment, it was possible to grasp how the tsunami propagates from the vicinity of the trough axis and the appearance of the tsunami striking from the southeastern side. It is estimated that the tsunami can be measured with a high accuracy of about 80 % or more in the range where the tsunami was detected by a method in which the correlation coefficient of the top 1 % in the 2 point correlation is used as the threshold value. Regarding the detection performance of the marine radar, the influence of the sea condition is small, and a tsunami can be detected approximately 30 km offshore. As for the influence on the tsunami detection performance due to the accumulation time of the observation data, tsunamis can be detected with high accuracy in one minute or two minutes observation, but the accuracy decreases in 4 minutes.
PROCEEDINGS OF COASTAL ENGINEERING, JSCE
PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING
