水系 (すいけい, suikei) Japanese meaning: water system | KotomoraThe 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.
