流域

liú yù miàn jī

流域面积

drainage area

cháng jiāng liú yù

长江流域

Yangtze River Valley

liú yù fàn wéi

流域范围

basin perimeter

liú yù de tǔ rǎng

流域的土壤

the soils of river valleys

kuà liú yù diào shuǐ

跨流域调水

across-basin water diversion