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Recently, the third generation wave models are widely employed in many countries. However, the examination of their estimation accuracy in an inland sea is not necessarily sufficient due to insufficient wave observation data and difficulty of estimating accurate wind field around the area In this paper, therefore, we applied a modified WAM to Seto Inland Sea with the wind data estimated for Typhoon 0514 with MM5 and Typhoon Bogus. The estimation accuracy of wind and waves were investigated with the data observed at a few stations. Several energy source functions that had been proposed so far were examined in the modified WAM. In addition, ADWAM (Adjoint WAM) was also applied for the data and its applicability and usefulness were discussed.

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The Flood Fighting Law stipulates that prefectural governors shall issue a flood fighting warning of storm surges on coasts previously recognized as being at high risk of storm surges. However, forecasts of storm surges and high waves before a typhoon approaches are insufficient information to issue a flood fighting warning because the forecasts do not indicate that the wave runup exceeds coastal dikes and wave forecasts are imprecise. Also, wave forecasts are not very precise near coasts because wave models do not consider wave transformation in shallow water such as shoaling and refraction. Therefore we are developing a real-time wave forecast system for inland seas to ensure proper flood fighting warnings