tidal bore; tidal flood; eagre
A tidal phenomenon where the leading edge of the incoming tide forms a wave or wall of water traveling up a river or narrow bay. The term is somewhat technical; in everyday Japanese, 潮津波 is less common than descriptive phrases.
A tidal bore is one of the natural phenomena observed at river mouths.
In this river, a tidal bore can occur at high tide.
Compound of 潮 (しお, 'tide') and 津波 (つなみ, 'tsunami, tidal wave'), literally 'tide tsunami'. The term is a direct calque or translation of the English 'tidal wave' in its older sense of a tidal bore, though modern usage distinguishes it from seismic tsunamis.