CS: Water Supply in NE China Flashcards
Population of Beijing
22million
Population of Tianjin
11million
What is Beijing’s population growth rate?
2.5%
What are Beijing and Tianjin’s populations growing?
rural-urban migration
What % of water in China is used for agriculture?
65%
What is China’s demand for water per year?
4.9billion m^3
What has industrial output increased by over the past 20years?
X6
What has happened to water used for industrial output in China?
increased but only marginally
since shift to high-tech production away from heavy industry
What % of China’s water from aquifers?
60%
When did China suffer from extreme droughts?
70s-80s
What happened when China suffered from extreme droughts?
demand for irrigation increased
Since the 1970s what has China’s water table done?
dropped 40m
The drop in China’s water table and over abstraction has led to what?
Beijing subsiding 0.5-1m annually
What is Tianjin’s surface water limited by?
Tianjin is downstream from Beijing
so suffers from upstream’s withdrawal’s and pollution
What type of pollution affects the nervous system?
mercury
What type of chemical waste has been found in China’s water?
PCBs (banned)
How many tonnes of industrial waste is released untreated globally per year into waterways?
400billion tonnes
When does most rain in northern china fall? What does this create throughout the year?
July-September
means seasonal imbalances throughout the rest of the year
