流域

• ピンイン: liú yù
• 漢字の分解: 流 = 氵+ 㐬 (flowing water); 域 = 土 + 或 (bounded area of land)

意味

流域（河川流域）

A key term in geography, hydrology, and environmental science. Used when discussing river management, ecological protection, and regional planning. China's major basins (长江流域, 黄河流域) are frequently referenced in policy and media.

例文

1. 长江流域横跨多个省份，是中国最重要的农业和工业生产基地之一。
2. 政府出台了一系列政策，对黄河流域的生态环境进行系统保护与修复。
3. 科学家在该流域发现了一种此前未知的淡水鱼类，引发了广泛关注。

使い方ガイド

場面: geography, environment, policy

トーン: academic

正しい言い方

• 长江流域的湿地保护工作已纳入国家生态文明建设的总体规划。(Wetland conservation in the Yangtze River Basin has been incorporated into the overall plan for national ecological civilisation development.)
• 研究人员对该流域上下游的水质进行了系统采样与分析。(Researchers conducted systematic sampling and analysis of water quality in both the upper and lower reaches of this river basin.)

避ける言い方

• 将流域与河床混用 — 流域 refers to the entire catchment area of a river, while 河床 refers specifically to the riverbed (Don't confuse 流域 (entire catchment area) with 河床 (the riverbed itself))

起源と歴史

流 (to flow) + 域 (area/region)

文化的背景

世代: All ages

社会的背景: Universal