水みずだめ

noun

sump; water reservoir; water tank

Refers to a pit, tank, or reservoir for collecting water, often in industrial, agricultural, or drainage contexts.

• 工こう場じょうの地ち下かには水みずだめが設せっ置ちされている。

  A sump is installed in the basement of the factory.

• 大おお雨あめのとき、水みずだめがすぐにいっぱいになる。

  During heavy rain, the water reservoir fills up quickly.