下か流りゅう域いき

noun

lower reaches; downstream area

Refers to the lower part of a river or valley, often in geographical or environmental contexts.

• その工こう場じょうは川かわの下か流りゅう域いきに位い置ちしている。

  The factory is located in the lower reaches of the river.

• 下か流りゅう域いきでは水すい質しつ汚お染せんが深しん刻こくだ。

  Water pollution is serious in the downstream area.