Grade 8 Geography Temporal Distribution Characteristics of Water Resources in China Measures to be S

Characteristics of water resource distribution:

China's water resources per capita and per mu are small.

The spatial and temporal distribution of water resources is uneven, and the combination of water and land resources is unbalanced.

Soil erosion is severe, and many rivers have a high sediment content.

The development and utilization of water resources in China is very uneven.

5) The contradiction between supply and demand of water resources is acute.

Solution: 1. Improve the efficiency of water utilization and open up a second water source.

2. Adjust the flow of water sources and increase reliable water supply.

3. Strengthen water resources management.

4. Increase sewer construction and develop urban sewage treatment plants.

5. Compress water consumption and develop reclaimed water technology.

6. Regulate the flow of water sources.

7. Watershed management of water sources.

8. Increase sewer construction and develop urban sewage plants.

9. Collection and utilization of urban rainwater.

The characteristics of the temporal distribution of water resources in China (more in summer and autumn, less in winter and spring, large interannual variation, and measures to solve the problem (construction of water conservancy projects), for example, on the Yangtze River (

Three gorges. engineering and on the Yellow River (Wanjiazhai) (

Small wave bottom. Project; Characteristics of the spatial distribution of water resources in China (more in the east and less in the west, more in the south and less in the north), and measures to solve the problem (

Cross-basin water transfer, for example, to alleviate water scarcity in Tianjin (Luan to Tianjin.

project, to alleviate the shortage of supply in Qingdao (

Introducing Huang Jiqing to alleviate the northern region of our country.

Works carried out due to severe water shortages.

1.Open source: Build reservoirs. Addressing the uneven distribution of water resources.

Inter-basin water transfer. Solve the uneven spatial distribution of water resources.

Rational exploitation of groundwater.

Desalination. Artificial rainfall.

2.Throttling: Agriculture:

Develop water-saving agriculture. Improved irrigation techniques use sprinkler irrigation and drip irrigation.

Breeding drought-tolerant crops.

Adjust the structure of agriculture.

Industry. Conserve water and recycle it. Improve water resource utilization.

Cleaner production, prevention and control of water pollution, and the implementation of sewage recycling.

Adjust the industrial structure and restrict the development of high-water-consuming industries.

Life. Enhance citizens' awareness of water conservation and amusement.

Ecological construction. According to the local system, the land should be returned to the lake, the farmland should be returned to the mountains, the blind forests should be returned to grazing land and grassland, and trees should be planted.

The characteristics of the temporal distribution of water resources in China (more in summer and autumn, less in winter and spring, large interannual variation, and measures to solve the problem (construction of water conservancy Kaisuisen workers' yard), for example, the Yangtze River (Three Gorges. engineering and on the Yellow River (Wanjiazhai) (

Xiaolangdi) water conservancy hub; The spatial distribution characteristics of water resources in China (more in the east and less in the west, more in the south and less in the north), and the measures to solve the problem are to focus on the mu (

Cross-basin water transfer, for example, to alleviate water scarcity in Tianjin (Luan to Tianjin.

project, to alleviate the shortage of supply in Qingdao (

The project of diverting the Yellow River to the Qing Dynasty is a project implemented to alleviate the serious water shortage in northern China.

First of all, precipitation, in time, China is in the monsoon region, there is more precipitation in summer and autumn, and less precipitation in winter and spring, so the time is unevenly distributed; Spatially, the moist airflow from the Pacific Ocean can increase the precipitation in China, but the large number of mountains and rivers in China hinders the northward movement of the warm and humid airflow, so that the distribution of precipitation in inland areas and coastal areas is uneven. Secondly, it is related to the flood season of various rivers, in the spring and summer of China, the water volume of each river basin will increase, and there is a relative to the north, the water resources of the southern river basin are relatively rich, so the spatial and temporal distribution of water resources in China is uneven. In addition, the distribution of water resources in China has the significant characteristics of uneven distribution of time and space, as well as the imbalance of water and soil resources. Due to the distance between the east and west from the sea and the large difference between the north and south latitudes, the regional distribution of precipitation and runoff in the country is extremely uneven, and the general trend is decreasing from the southeast coast to the northwest inland.

The distribution trend of surface runoff in China is basically similar to that of precipitation, but the unevenness of regional distribution is more serious than that of precipitation. In general, there is more water, more people, and less land in the south; The north has a lot of land, a lot of people, and a lot of water. The total water resources of the four areas in the south account for 81% of the country, and the per capita water share is about twice the national average, and the average water per mu is twice the national average.

Among them, the per capita water resources of the southwest rivers reached 15 times the national average, and the average water per mu reached 12 times the national average. In the north, the three major river basins of the Yellow River, Huai River and Haihe River account for only 34% and 39% of the total water resources of the country, while the population and arable land account for 39% and 39% of the country, respectively. In particular, the per capita and per mu water volume is the lowest in the country, with the per capita water share being 16% of the national average and the average water per mu being 14% of the national average, making it one of the most serious areas of water shortage in China.

Compared with the north and the south, the per capita water volume of the former is twice that of the latter, and the average water volume per mu is doubled. Compared with the Hailuan River, the per capita water volume of the former is 89 times that of the latter, and the average water volume per mu is 87 times.

The temporal distribution characteristics of water resources in China are as follows: more in summer and autumn, less in winter and spring; The spatial distribution characteristics of water resources in China are as follows: abundance in the south and shortage in the north.

Question analysis: Due to the significant influence of monsoon climate in China, there is more precipitation in summer and autumn and less precipitation in winter and spring, so China's water resources have the characteristics of more summer and autumn and less winter and spring. Due to the influence of the summer monsoon, the rainy season in China moves from south to north, which makes China's water resources appear to be abundant in the south and scarce in the north.

Seawater is salty, we need fresh water, although the area of seawater is much larger than that of land, but the cost of desalination is very high, and it cannot be promoted at present. There is also brackish water in terrestrial water reserves, and freshwater accounts for only about about the world's water reserves, most of which is also distributed in the ice, snow and permafrost of the poles and high mountains, and is difficult to use: only about what is available is about it.

And now water is scarce and polluted. So save water.

China's vast geographical area, large latitude and longitude, the characteristics of terrain diversity, and the climate are also very diverse, which has contributed to the uneven distribution of rainwater in China. Rainfall is higher at low latitudes and along the coast, and less rainfall inland.

We use fresh water in our lives, more groundwater, and excessive groundwater pumping will cause the earth's crust to sink, and it takes a long period for drinking groundwater to form, not infinite storage.

The time distribution is uneven, there are more summers and autumns, less spring and winter, and there are more space in the south and less in the north, and the earth is divided into seven oceans and three lands, but because the ocean water is mostly saltwater, the water used in our daily life is fresh water, and it takes a lot of technical and economic strength to desalinate the salty water, which is unrealistic at present, and there are polar glaciers, which are also difficult to use, so we still have to save water.