What are the climatic reasons for the uneven spatial distribution of water resources in China?

The main reason for the climate is that the precipitation in China is mainly brought by the summer monsoon, and the order and direction of the summer monsoon are closely related, and the southeast coast is at the forefront of the summer monsoon The precipitation is naturally more abundant, and the influence of the northwest summer monsoon is smaller, and the precipitation is gradually reduced.

1.From the perspective of marine water vapor resources, the farther inland and farther away from the Pacific Ocean, the water vapor can reach the northwest of Gansu at most, so the northwest region forms an inland arid zone. Water resources are decreasing from east to west. It's for longitude zonality!

2.The Qinghai-Tibet Plateau blocks the hot air flow (Indian Ocean) from the south, which is the main cause of drought in Xinjiang.

3.Topography has a great influence on the spatial distribution of precipitation, and the unique topography of Xinjiang in China makes it difficult for the air currents from the Atlantic and Arctic Oceans in the south and from the northwest region to reach it, or to reach it in small amounts. It is for topographical reasons.

This is because precipitation is the main limiting factor in the distribution of water resources.

China is located on the east side of the Eurasian continent and has a vast territory, so there are many types of climate in China, and different climate types cause different rainfalls. At the same time, China's landforms are different, which leads to different distribution of water resources in two places even if they are in the same climate type.

China has a monsoon climate, and the rainfall season is uneven and variable.

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Reading the map analysis shows that:

1) The uneven distribution of water resources in China is mainly characterized by more summer and autumn, less winter and spring, and large interannual variation The main measure to solve the problem of uneven spatial distribution of water resources in China is to implement water diversion projects, and the main measure to solve the problem of uneven time distribution of water resources in China is to build reservoirs

2) Conserve water.

Everyone has a responsibility In terms of rational use of water and protection of water resources, as citizens, we should use water rationally, save water, pay attention to the treatment and discharge of sewage, and strengthen publicity

3) The basic national conditions of China's land resources.

Yes: the total amount is large, and the per capita share is small; All kinds of land resources in China are complete, forming a variety of land types such as cultivated land, forest land, grassland, etc., the proportion of various land resources in the total land resources is different, the proportion of cultivated land and forest land is small, the grassland area is large, the proportion of land that is difficult to use is large, and the reserve land resources are insufficient

4) China's national land policy is to "cherish and rationally use land and effectively protect cultivated land".

5) Agriculture is the foundation of the national economy, and industry is the leading factor of the national economy; Coal is the "food of industry"; The level of development of high-tech industries is a measure of a country's comprehensive national strength.

important signs

Therefore, the answer is: (1) the summer and autumn seasons are large, and the winter and spring seasons are small; implementation of water diversion projects; construction of reservoirs; (2) Rational use of water, water conservation, attention to the treatment and discharge of sewage, strengthen publicity, etc.; （3）c；(4) Cherish and rationally use land and effectively protect cultivated land; （5）√；

1. Natural causes: The northern region is mainly located in the temperate monsoon climate zone, the distribution of precipitation seasons is uneven, rainy in summer and less rainy in winter, and the total amount of precipitation is generally less than 1000mm, and the amount of precipitation is not much. Coupled with global warming, evaporation has increased, resulting in a decrease in the total amount of water remaining.

2. Human causes: a large amount of water use and domestic water use in industry and agriculture have increased; Waste is high; over-exploitation of groundwater; Destruction of vegetation and wetlands, reduction of surface and underground water storage, etc.

Rule: When solving resource problems, the cause analysis generally starts from the two aspects of nature and man-made, the natural cause is the origin, and the complex human factor is also the direct cause of the problem.

The main measure to solve the uneven spatial distribution of water resources in China is cross-basin water transfer.

According to the definition of water resources in the International Glossary of Hydrology of the World Meteorological Organization and UNESCO, water resources are water sources that are available or likely to be used, in sufficient quantity and of appropriate quality, to meet the specific needs of a place over a period of time.

According to the definition of water resources in the water conservancy science and technology terminology published by the National Committee for the Examination of Scientific and Technological Terms, water resources refer to the water on the earth that has a certain quantity and usable quality that can be replenished from nature and can be used. Water is not only the main component that makes up the body, but it also has many physiological functions.

The solubility of water is very strong, and many substances can be dissolved in water and dissociated into an ionic state, which plays an important role. Water-insoluble proteins and fats can be suspended in water to form colloids or emulsions, which are convenient for digestion, absorption and utilization; Water directly participates in redox reactions in the human body, promoting various physiological speech and biochemical reactions.

Without water, it is impossible to maintain physiological activities such as blood circulation, respiration, digestion, absorption, secretion, and diarrhea, and the metabolism in the body cannot be carried out; The specific heat of water is large, which can regulate the body temperature and keep it constant. When the outside temperature is high or the body produces a lot of heat, water evaporation and sweating can help dissipate heat.

The importance of water resources:

On Earth, water, which can be used directly or indirectly by humans, is an important part of natural resources. Natural water resources include river runoff, groundwater, snow and glaciers, lake water, swamp water, and seawater. According to the water quality, it is divided into fresh water and brackish water.

With the development of back-branching science and technology, more water has been used by humans, such as seawater desalination, artificial catalytic precipitation, and the use of Antarctic continental ice.

Due to changes in climatic conditions, the spatial and temporal distribution of various water resources is uneven, and the amount of natural water resources is not equal to the amount of available water.

Unlike other natural resources, water is a renewable resource that can be reused multiple times; and intra-annual and inter-annual volume changes, with certain periodicity and regularity; The form of storage and the movement process are affected by physical geographical factors and human activities.

The imbalance in the distribution of water resources in China in time and space is manifested in ()aThe precipitation is concentrated in winter, and the water resources in the eastern and southern regions are relatively abundant, while the mold slag excavation in the western and northern regions is seriously poor.

b.Precipitation is concentrated in summer, and the eastern and southern regions are relatively rich in water resources, while the northern part of the west is severely poor and lacking.

c.Precipitation is concentrated in summer, and water resources are severely scarce in the eastern and southern regions, while the western and northern regions are relatively abundant.

d.Precipitation is concentrated in spring, and water resources are severely scarce in the eastern and southern regions, while the western and northern regions are relatively abundant.

Correct answer: B

1. In terms of time, water resources are concentrated in summer and autumn and more in summer and autumn, and less in winter and spring (affected by the summer monsoon).

2. In terms of spatial distribution, due to the proximity of the east to the coast, the long rainy season in the south and the short rainy season in the north, and the deep inland in the west, the pattern of more water resources in the east and less in the west and less in the south and north (affected by sea and land factors and summer monsoon).

Distribution map of China's water resources:

The main measures to address water scarcity are:

1. Cross-basin water diversion to solve the problem of uneven spatial distribution of water resources, and the water diversion projects that have been built or are under construction include: diversion of water from Luan to Tianjin, diversion from Huang to Qingdao, and water diversion from the south to the north;

2. Build reservoirs to solve the problem of large seasonal changes in water resources. For example, the large-scale Three Gorges Project on the Yangtze River and the Xiaolangdi Water Conservancy Project on the Yellow River will play a major role in flood control, irrigation and water resource allocation.

3. Save water and prevent water pollution, water pollution and waste have exacerbated the situation of water stress to a certain extent. In the future, we should intensify sewage treatment, develop water-saving agriculture, carry out comprehensive utilization of water resources, and reduce or eliminate water waste.

The magnitude of precipitation varies due to the influence of the summer monsoon.