Meaning and Usage
"河川" (かせん) refers collectively to rivers and streams, encompassing natural flowing water bodies. It is a formal term often used in official contexts such as environmental reports, urban planning, and disaster prevention.
Common Contexts
You will frequently see "河川" in news reports about flooding, water quality, and river management. It is less common in casual conversation, where simply "川" (かわ) or "川辺" (かわべ) might be used.
Collocations and Patterns
- 河川の氾濫 (かせんのはんらん): river flooding, used in disaster contexts
- 河川敷 (かせんしき): riverbank or riverside area, often a place for recreation
- 河川の水質 (かせんのすいしつ): water quality of rivers, common in environmental discussions
Register and Nuance
"河川" is a neutral to formal term. It is appropriate in written language, official documents, and scientific contexts. Avoid using it in casual speech where "川" is more natural.
Common Mistakes
Learners sometimes confuse "河川" with just "川". Remember that "河川" is a collective noun referring to all rivers and streams in an area, while "川" usually refers to a single river or stream. Use "河川" when discussing rivers in a general or official sense.