可か動どう堰ぜき

noun

movable weir; adjustable dam gate

Technical term for a gate or weir that can be raised, lowered, or adjusted to control water flow in rivers or canals.

• この川かわには洪こう水ずいを防ふせぐための可か動どう堰ぜきが設せっ置ちされている。

  A movable weir has been installed on this river to prevent flooding.