Why is the population capacity of the semi arid region of the western United States different from t

Think of it this way:

First of all, we must think clearly about what is called "population capacity", which is commonly known as how many people can be supported by a place.

Analyzed from a natural point of view:

2 The temperature difference between day and night in the semi-arid region of western China is smaller than that in the semi-arid region of western China (considering and comparing continental), which is more suitable for human habitation.

Analysis from a socio-economic point of view:

2 The semi-arid areas of the western United States have strong transportation links with the outside world, and the transportation of materials makes the local economy and people's living conditions better.

The western part of the United States is actually in the western part of the North American continent and the east coast of the Pacific Ocean, while the northwest of China is also in the middle of the Eurasian continent and has a dry climate.

Because the western part of our country is an inland area, the arid and environmental conditions are not good, so the natural population capacity is small.

And the western part of the United States, which is close to the Pacific Ocean, has humid conditions that are suitable for human habitation, so it has a large population.

Population capacity is related to many conditions such as water, climate, biological conditions, land quality, natural resources, and so on.

Population capacity is regional, and different regions have different resource conditions, environmental conditions, scientific and technological levels, and people's living standards.

The most drought-stricken region in our country is the northwest. The arid areas of northwest China include Xinjiang, Qinghai, Gansu, Ningxia and Qinling Mountains in Shaanxi.

In the northern part of Inner Mongolia and western Inner Mongolia, there is relatively little rainfall throughout the year, and it is possible that there will not be much rain for several years.

Is the region of our country severely drought?

Attention should be paid to distinguishing it from the most drought-stricken areas in China, and the most drought-stricken areas in China are North China.

Because North China is a densely populated area, densely populated and developed in agriculture, it needs to consume a lot of water, and once it does not rain for a long time, the surface water will be greatly reduced, and drought will easily occur.

In terms of drought level alone, the northwest region of our country.

It is the most serious, but the northwest region has less industry and agriculture, and the population is smaller, so the impact and losses caused are smaller.

The most drought-stricken region in our country is the northwest. The arid areas in northwest China include Xinjiang, Qinghai, Gansu, Ningxia, the areas north of the Qinling Mountains in Shaanxi, and the western part of Inner Mongolia.

Pay attention to distinguish it from the most drought-stricken areas in our country, the most drought-stricken areas in our country are North China, because North China is a densely populated area, densely populated, and developed in agriculture, which requires a large amount of water.

In terms of drought degree alone, the northwest region of China is the most serious, but the northwest region has less industry and agriculture, and the population is also smaller, so the impact and losses caused are small.

This year's precipitation is relatively low and the temperature is relatively high, which has led to drought, and in addition, it is also caused by overgrazing and over-cultivation.

It's because the weather is so hot, and there's global warming, that causes drought.

Now that the Northwest of the United States is experiencing the worst drought crisis due to the impact of the environment, people must protect the environment and take care of the environment.

Some parts of the western and northern parts of China have an arid and semi-arid climate. The annual precipitation here is less than 300 mm, and the evaporation capacity exceeds the precipitation by about 1,000 mm. The dividing line between arid and semi-arid areas and monsoon regions is about the Hexi Corridor.

China's arid and semi-arid areas are rich in radiation and heat resources, but the precipitation resources are insufficient, so that the development and utilization rate of climate resources is very low. Due to the lack of data on mountainous areas with high precipitation, the drought level in this area reflected by meteorological data mainly from plain observation stations may not be completely consistent with the actual situation. Similarly, it is not possible to conclude that Northwest China is not arid, or that the degree of drought is not as good as that of North China, based on the per capita per mu figure of water resources.

This is because the water resources mentioned here are based on hydrostatistical data, which only include two components, runoff and groundwater recharge, but do not include soil water. In areas where precipitation is not high, most of the precipitation seeps into the soil and becomes soil water, making it difficult to form runoff or replenish groundwater. Therefore, soil water with a large proportion is not included, and the error is very large.

The water vapor of precipitation in the mountainous areas of arid and semi-arid areas in China is also a problem worthy of attention. Although the possibility of summer monsoon precipitation cannot be completely ruled out here, the summer monsoon has been very weak by this point, and there is very little precipitation. At the same time, according to the seasonal distribution of precipitation, it is also possible to judge the ** of water vapor, because it has exceeded the general edge of the summer monsoon activity, that is, it is impossible for the summer monsoon to reach it until midsummer.

The summer precipitation in the mountainous areas of northwest China is much less concentrated than that in North China. In the western part of the region is the windward slope of the Atlantic current. In the winter half of the year, the Atlantic airflow is the main precipitation in Europe, and even in western Siberia.

In Central Asia, although the precipitation decreases, there is still a certain amount of water vapor in the air, and when it meets with the mountainous areas in the northwest of China, it produces an updraft, forming more rainfall, making it one of the few areas in China with more precipitation in the winter half of the year than in the summer half of the year. Even in the Qilian Mountains in the eastern part of the plateau, compared with the westerly airflow, it is already a leeward mountain system after many heavy mountains, but the snowfall here still forms a high value period in spring and autumn, becoming one of the important water sources.

It can be seen that although the arid region of northwest China is not greatly affected by the summer monsoon precipitation, it can still get more water from the westerly wind belt.

Although the western United States is close to the Pacific Ocean and theoretically has sufficient Pacific warm and humid airflow to reach it under the influence of westerly winds, the Rocky Mountains are located next to the western Pacific Ocean in the United States, and the high mountains block the eastward movement of water vapor, so that precipitation on the eastern side of the Rocky Mountains is limited.

In addition, looking at the map of the West Coast currents of the United States, the West Coast of the United States is affected by the cold current of California, which affects the formation of water vapor, so that the westerly wind belt itself has extremely limited moisture, so precipitation is even more limited, so it will form an arid desert.