Will there be a drought in the spring What are the causes of spring drought?

The distribution characteristics and change law of precipitation determine that drought disasters in China are universal, regional, seasonal and persistent. The general pattern of drought in each region is as follows: spring drought and spring and summer drought are the main ones in Northeast China; The drought-prone season in the Huang-Huai-Hai region is spring and summer, and spring drought is the main season.

In recent years, this area has not only experienced annual spring droughts, but also many inter-annual droughts; The middle and lower reaches of the Yangtze River are mainly drought or autumn drought; In southwest China, there are many winter and spring droughts, mainly in winter and spring. Although the total amount of precipitation in South China is abundant, due to the uneven distribution of annual and seasonal precipitation, there are often droughts in spring, summer and autumn. Precipitation in Northwest China is scarce and is a year-round drought, and the water source for crop irrigation mainly depends on snowmelt and a small amount of rain from high mountains. If the snow is thin, or if the temperature is low and there is little snowmelt and irrigation water is insufficient, the area will experience severe drought.

The drought you say in spring is just a very normal natural phenomenon, but it is not the whole season, summer, winter, and autumn will also be dry. It's just that thousands of years of natural laws have allowed us to form a very arid scene of spring drought. But from another point of view, the blooming of flowers and the revival of all things in spring give us a very good wish.

So I felt that she was very charming again, and she didn't feel dry at all. Maybe it's because of the difference in mentality.

The reasons for the formation of spring drought are:

1. Imbalance of water resources. There is more water and less arable land in the south of our country, and less water and more arable land in the north. This imbalance of water resources between regions is the cause of drought in our country.

An important factor in disasters.

2. Less precipitation. In general, the amount of precipitation.

Below average.

It is prone to drought. In China, the seasonal changes of precipitation in different regions form the basis for the distribution of seasonal drought-prone areas in China.

In the area south of the Yangtze River, due to the early and late arrival of the summer monsoon, the rainy season is early and long, and if the monthly rainfall is small, it is easy to produce drought.

North and Northeast China.

The rainy season is from June to September, and the spring drought and spring and summer drought are particularly severe. Southwest.

It mainly relies on the precipitation brought by the southwest monsoon, and the dry season is from November to April of the following year.

3. Drought often becomes a serious natural disaster because of its long duration, wide spread, and famine.

Drought can be divided into two aspects: soil drought and atmospheric drought that are interrelated. The main manifestation of soil drought and climate aridity is insufficient precipitation. Therefore, insufficient precipitation is the crux of the drought problem and the root cause of drought.

Precipitation is a key factor that directly affects whether the land is drought, and the probability of drought is directly proportional to rainfall, but drought is not completely determined by rainfall, but also related to evaporation and other factors.

4. Socio-economic aspects. The socio-economic aspect mainly refers to the increase in water use for industrial and agricultural production in China in recent decades.

It has to do with less precipitation. In the spring, the climate warms up in most parts of the country, but because of the long dry winter, the earth itself is short of water, so there is no water vapor.

In order to provide precipitation, especially in the northern interior, there is simply not enough water vapor to total its precipitation.

Although the southeast wind has begun to blow in spring, because the southeast wind is relatively weak at this time, the water vapor blowing is still not enough, so it has disappeared into the air before precipitation has been formed, and it is really difficult for the southeast wind to reach the northern inland areas at this time.

In addition, the cause of the spring blind transport and drought is also related to the terrain and air pollution, environmental damage, if the terrain is mountainous, then the summer monsoon is also difficult to reach, and the air pollution is serious, the environment is damaged, and the greenhouse effect.

It will be aggravated, the climate will rise, the water vapor will increase rapidly, and droughts will occur frequently.

Level classification:1. If there is no precipitation for 16 consecutive days and 30 days in spring, it is a small drought.

2. If there is no precipitation for 31 consecutive days and 45 days in spring, it is a moderate drought.

3. If there is no precipitation for 46 consecutive days and 60 days in spring, it is a major drought.

3. If there is no precipitation for more than 61 consecutive days in spring, it is a severe drought.

Summary. Generally speaking, drought refers to a long-term lack of precipitation, which affects the surface water, resulting in soil dryness, plant death, crop yield, livestock death, water shortage, etc. Droughts usually occur in the summer, as summer is the season of the year when the precipitation is at least, and the high summer temperatures can also exacerbate the drying of the soil.

To solve the problem of drought, the first thing to do is to strengthen the management of water resources, improve the efficiency of water resource utilization, improve the distribution structure of water resources, increase the utilization rate of water resources, and reduce the waste of water resources. Second, it is necessary to strengthen soil and water conservation, improve soil quality, increase soil water storage capacity, reduce soil erosion, and improve soil wetness to reduce the occurrence of drought. In addition, it is necessary to strengthen the climate**, detect the occurrence of drought in time, and take effective response measures to reduce the impact of drought.

Generally speaking, drought refers to a long-term lack of precipitation, which affects the surface water, resulting in soil dryness, plant death, crop yield, livestock death, water shortage, etc. Droughts usually occur in the summer, as summer is the season of the year when the precipitation is at least, and the high basal temperature in the summer can also exacerbate the drying of the soil. To solve the problem of drought, the first thing to do is to strengthen the management of water resources, improve the efficiency of water resource utilization, improve the distribution structure of water resources, increase the utilization rate of water resources, and reduce the waste of water resources.

Second, it is necessary to strengthen soil and water conservation, improve soil quality, increase soil water storage capacity, reduce soil erosion, and improve soil wetness to reduce the occurrence of drought. In addition, it is necessary to strengthen the climate, detect the occurrence of drought in time, and take effective countermeasures to reduce the impact of drought.

I'm still a little confused, can you be more detailed?

Generally speaking, drought refers to a climate phenomenon in which long-term precipitation is insufficient, resulting in insufficient soil moisture and affecting plant growth. Droughts usually occur in the summer because summer is the season of the year with the least precipitation, and the summer temperature is relatively high and the transpiration of plants is relatively high, which can exacerbate the loss of soil moisture, which can lead to the occurrence of drought. In addition, droughts can also occur in other seasons, such as spring, where there is less precipitation and the growth needs of plants are higher, which can lead to the loss of soil moisture, which can lead to drought.

In addition, drought can also occur due to other reasons, such as poor soil structure, poor soil permeability, hardening of the soil surface, low vegetation coverage, etc., which can lead to the loss of soil moisture, which can lead to the occurrence of drought. Therefore, drought can occur in any season, but summer is the most drought-prone season. In order to prevent the occurrence of drought, we should strengthen soil and water conservation, improve soil structure, increase vegetation cover, control soil erosion, and strengthen the management of water resources to ensure the sustainable use of water resources.

Summary. The drought occurs in spring and summer.

The drought occurs in spring and summer.

Can you add, I don't quite understand it.

Spring and summer. Let me elaborate on the reasons and regions. Spring drought is generally in southwest China and north China.

There are many tall mountains in the southwest region, and the winter wind is blocked by the mountains at this time, and the summer wind is not formed, which is easy to form spring drought. The second is North China, where the mid- and high-latitude zonal circulation prevails, while the northerly meridional airflow is weak, making it difficult to bring the strong cold air from Siberia into China, so there is sometimes less snowfall in winter in North China. Spring warms up rapidly in northern China, and precipitation is low.

Because the precipitation in North China mainly relies on the water vapor brought by the east monsoon in the Pacific Ocean to form precipitation, but the east monsoon mainly affects South China in spring, and the east monsoon has not yet affected North China, so North China has less precipitation, large evaporation, and evaporation is greater than precipitation, and North China has developed industry, especially heavy industry, industrial development requires large water, and natural water consumption is more. North China's already scarce water resources are even less, which is why the spring drought in North China is formed. With the increase of temperature, the land pressure decreases, and the subtropical high pressure (Hawaiian high) over the Pacific Ocean gradually moves westward, and the middle and lower reaches of the Yangtze River are controlled in mid-July and mid-August in normal years. Under the control of high pressure (anticyclone), the downdraft is very strong, and it is difficult to form precipitation The weather is sunny and the temperature is high, and the evaporation of Juling is vigorous, forming a drought in midsummer.

Therefore, the middle and lower reaches of the Yangtze River are dry in midsummer.