noun, noun which may take the genitive case particle 'no'
downstream; lower reaches
Refers to the downstream area of a river, or the direction toward the mouth. Often used in contrast with 川上 (upstream).
See also: 川上
There is a small village downstream on this river.
川下の地域は洪水に注意が必要だ。
The downstream area needs to be careful about flooding.
We let the boat drift downstream from the bridge.
The fallen leaves floated away downstream.