noun
storm surge barrier; seawall; tide embankment
A coastal defense structure designed to protect against storm surges and high tides. Often used in technical or disaster prevention contexts.
See also: 防潮堤
高潮堤がなければ、この町は台風のたびに浸水していただろう。
Without the storm surge barrier, this town would have been flooded every time a typhoon hit.
市は海岸沿いに新しい高潮堤を建設する計画を発表した。
The city announced a plan to build a new seawall along the coast.
Compound of 高潮 (high tide, storm surge) and 堤 (embankment, bank).