水すい門もん

noun

sluice gate; water gate; flood gate

A gate or valve that controls water flow, typically in a canal, dam, or river. The term covers sluice gates, lock gates, and flood gates.

• 大おお雨あめのため、水すい門もんを開あけて放ほう流りゅうした。

  Due to heavy rain, they opened the sluice gate to release water.

• 運うん河がの水すい門もんで水すい位いを調ちょう節せつする。

  They adjust the water level with the canal's lock gate.