A general term referring to various types and sizes of rivers, including their associated characteristics and behaviors, such as flooding or seasonal changes.
The officially designated riverbeds and riverbanks as defined by specific legal frameworks, emphasizing their regulated nature and importance in terms of land use and management.
An encompassing term for all rivers, highlighting their aggregate impact on the landscape, ecosystems, and human activities, often used in discussions about natural disasters and environmental studies.
Example:
河川は豪雨で氾濫しました。
A designated area alongside a river that is regulated by law and serves as land for the river's access and functionality.
The space located between the embankments of a river, which is characterized by different zones that are affected by varying water levels during periods of high and low flow.
An officially recognized stretch of land adjacent to a river, encompassing the regions that are inundated during floods and are exposed during normal water conditions.
A river classified by the government as being of significant importance for national land preservation and the economy, which has designated sections outlined by regulation.
A river that is recognized for its critical role in maintaining ecological balance and supporting economic activities, governed and managed by national authorities.
A designated waterway of high importance, which is subject to specific regulations and oversight to ensure its preservation and proper management for public benefit.