noun
river flooding; overflow of rivers
Refers specifically to flooding caused by rivers overflowing their banks, often due to heavy rain or levee breaches. Used in news, disaster reports, and technical contexts.
台風の影響で各地で河川氾濫が発生した。
River flooding occurred in various areas due to the typhoon.
河川氾濫の危険性が高まっている。
The risk of river flooding is increasing.
Compound of 河川 (river) and 氾濫 (overflow, flooding).