水系
Meanings
1
water system; river system; drainage system
Refers to the network of rivers, streams, and drainage in a region. Often used in geography, environmental science, and civil engineering contexts.
The water system in this area tends to flood whenever there is heavy rain.
The Tone River system includes many tributaries.
Usage patterns
- 〈場所〉水系the [river name] river system (used to name a specific drainage network)
The Tone River system spans a wide area of the Kanto region.
- 〈物〉が水系に属する(a river) belongs to a certain water system
This river belongs to the Tone River system.
- 水系を汚染するto pollute a water system
Wastewater from the factory polluted the surrounding water system.
- 水系を保全するto conserve/protect a water system
Activities are being carried out to conserve the local water system.