※ “Flood forecast river, etc.” includes the flood forecast river, water level well-known river and flood control alarm river.
Flood inundation water level is applied to the reference points of flood forecast river and water level well-known river.
Flood danger water level is applied to the reference points of flood forecast river and water level well-known river.
Flood warning water level is applied to the reference points of flood control alarm river.
Stand-by water level for Flood Defense is applied to the reference points of flood control alarm river.
※ Acknowledge all the important points in the 『Information supply』 section before using the information.