Untitled

Abstract

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