SOPHISTICATION OF ESTIMATING DESIGN DEEPWATER WAVES BY WAVE SIMULATION, AND INVESTIGATION OF LONG-TERM TREND OF EXTREME WAVES IN TOHOKU AREA

To estimate the design deepwater wave (probability deepwater wave), it is necessary to carry out a selection of the meteorological events, estimation of the wind field and wave simulation, with high efficiently and accurately, respectively. The purpose of this study is to summarize the problems of the conventional methods and to demonstrate the new solution in Tohoku area as a case study. In addition, the long-term trends of the probability waves and the difference of probability waves according to the statistical period are discussed. The results show that the annual maximum wave heights were increasing on the Japan Sea area, and that the 50 years probability wave heights were also increasing slowly.