"Water Resources" China's natural resources PPT courseware 3

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"Water Resources" China's natural resources PPT courseware 3

water resources

Broad term: the general term for all bodies of water on earth.

Narrow sense: fresh water resources on the earth.

River water and freshwater lake water are my country's main freshwater resources.

The size of a country's river runoff can generally indicate the amount of water resources in the country.

Why is there a water shortage in the Northwest?

The climate is arid and precipitation is scarce.

Why is there water shortage in North China?

Natural causes: It is mainly located in semi-humid areas with low precipitation and high evaporation. The spring drought is particularly severe, and the rivers flowing through it have small flows.

Social and economic reasons: North China has concentrated industry and agriculture, a large urban population, large water demand, and serious water resource pollution and waste.

The impact of uneven spatial and temporal distribution of water resources in my country

There are obvious differences in agricultural land use patterns between the north and the south.

Seasonal and interannual changes in precipitation and runoff are the main reasons for frequent floods and droughts and unstable agricultural production.

In the arid areas of northwest China, insufficient water resources are a bottleneck restricting social and economic development.

think:

Please observe the route diagram of the South-to-North Water Diversion Project and answer the following questions:

How many routes does the South-to-North Water Diversion Project have?

Which line is the closest and where does it solve the water shortage problem?

Which reservoir is the starting point of the middle line plan?

Which line runs along the Beijing-Hangzhou Grand Canal?

Think about it:

What causes water pollution?

Urban sewage, industrial wastewater, chemical fertilizers, and pesticides are the main causes of water pollution in our country, making the already scarce water resources even more tense.

In a sense: saving water is more important than transferring water.

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For more information about the "Water Resources China's Natural Resources" PPT courseware, please click the Water Resources ppt China's Natural Resources ppt tag.

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Update Time: 2024-09-15

This template belongs to Geography courseware People's Education Edition Geography for Grade 8 Volume 1 industry PPT template

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