丹江口库区为什么强调"清水北送"？
Why does the Danjiangkou reservoir stress "sending clean water north"?
它供给中线调水，水质直接关系北方饮水安全；因此库区要严控污染、退养、造林，把"水干净"放在产量之前。
It feeds the middle route, so its quality directly affects northern drinking water; the area strictly controls pollution, removes fish pens and plants trees, putting clean water before yield.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#丹江口 #水质 #水源地
南水北调为什么是"四横三纵"的格局？
Why is the South-North Water Transfer laid out as "four horizontals, three verticals"?
"四横"是长江、黄河、淮河、海河四大水系，"三纵"是东、中、西三条调水线；用南北通道把丰水的南方水引向缺水的北方，像给水系"织网"。
The "four horizontals" are the Yangtze, Yellow, Huai and Hai river systems; the "three verticals" are east, middle and west routes—north-south channels moving water from wet south to dry north, weaving the basins into a network.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#南水北调 #水系 #调配
跨流域调水，为什么可能改变"调出区"的生态？
Why can inter-basin water transfer change the ecology of the "donor" region?
丹江口等水源区水位、流速与湿地随之改变，岸线生态和下游用水节律都受影响；调水不是"免费的水"，需要把调出区的代价也算进账本。
Source areas like Danjiangkou see changed levels, flow and wetlands, affecting shoreline ecology and downstream use; transferred water isn't free—the donor's cost must be counted too.
难度 进阶 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#调出区 #水源 #生态代价