一座水库为什么既能防洪又能抗旱？
How can one reservoir both prevent floods and fight drought?
雨季把多余的河水拦在库里，减轻下游洪水；旱季再放水下流，补给灌溉和饮用，一库两用。
In rainy season it stores excess flow to cut downstream floods; in drought it releases water for irrigation and drinking—one reservoir, two jobs.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
丁曼《物理水文学》，Waveland Press，2015
Dingman, S.L., Physical Hydrology, Waveland Press, 2015
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL3903765W：Physical hydrology（首版 1
#水库 #调蓄
为什么城市常常比周围乡下热，像扣了口热锅？
Why are cities often hotter than the surrounding countryside?
这叫“热岛效应”：水泥沥青吸热快、绿地水体少、汽车空调排热多，加上高楼挡风，热量散不出去，城里就比郊外热。
The urban heat island: concrete absorbs heat, there is less greenery and water, traffic and AC add heat, and buildings trap it—cities run hotter than suburbs.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#热岛效应 #城市
北方明明有黄河，为什么还要南水北调？
The north has the Yellow River, so why divert water from the south?
北方人口和工农业用水太大，本地河湖水远远不够，黄河水量也有限，必须从南方“借”水补充。
Northern demand from people, industry and farms far exceeds local supply, and the Yellow River alone can't cover it, so water is borrowed from the south.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
中国水利部《南水北调工程》
China Ministry of Water Resources (MWR), South-to-North Water Diversion Project
独立核验依据 · Independent verification: 核验依据 1 ARCHIVE 标识 pubmed-PMC3325841：The South-to-North Water Di
#水资源 #供需
南水北调是把水从哪儿调到哪儿？
Where does the South-to-North Water Diversion move water from and to?
它把长江丰富的水，沿着东、中、西三条线路调往缺水的华北和西北，缓解北方“渴”的问题。
It transfers abundant Yangtze water via east, middle and west routes to water-short North and Northwest China.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
中国水利部《南水北调工程》
China Ministry of Water Resources (MWR), South-to-North Water Diversion Project
独立核验依据 · Independent verification: 核验依据 1 ARCHIVE 标识 pubmed-PMC3325841：The South-to-North Water Di
#南水北调 #调水
海绵城市为什么像海绵一样能“吸水”？
Why can a sponge city soak up water like a sponge?
它用透水砖、下凹绿地、蓄水池等，让雨水就地渗入或暂存，下暴雨时不积水、干旱时还能慢慢放出来用。
Permeable pavement, sunken green spaces and tanks let rain soak in or be stored, reducing floods and releasing water in dry spells.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
住房和城乡建设部《海绵城市建设技术指南》，2014
Ministry of Housing and Urban-Rural Development (MOHURD), Sponge City Construction Technical Guide, 2014
#海绵城市 #透水
三北防护林为什么被称为“绿色长城”？
Why is the Three-North Shelterbelt called the Green Great Wall?
我国在西北、华北、东北风沙危害大的地方大规模造林，形成一道长长的林带，像长城一样挡住风沙、保护农田。
Massive tree planting across the windy north builds a long forest belt that blocks sand and shields farms, like a green wall.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
国家林业和草原局《三北防护林体系建设工程》
National Forestry and Grassland Administration (NFGA), Three-North Shelterbelt Program
#三北防护林 #防风固沙