明めい渠きょ

noun

open ditch; open channel

Technical term used in civil engineering and drainage contexts, contrasted with 暗渠 (covered/culvert).

See also: 暗渠

• この地ち域いきでは雨う水すいを明めい渠きょで排はい水すいしている。

  In this area, rainwater is drained through open ditches.