Usage patterns
〈場所〉の河川が氾濫するfor rivers in an area to flood/overflow
The rivers in the basin overflowed due to the heavy rain.
河川を管理するto manage/administer rivers
The Ministry of Land, Infrastructure, Transport and Tourism manages major rivers.
河川の水質を調査するto survey the water quality of rivers
Every year, the city surveys the water quality of the rivers.
河川に橋を架けるto build a bridge over a river
A new bridge was built over this river.