The Yangtze River basin is a water rich area, what is the reason for this drought? What is the droug

The reason for this drought is due to the extreme heat that has been in place for several days. There was no rain again. The drought situation is still very serious. At present, the issue of water and electricity is being vigorously coordinated.

The main reason for the drought disaster is the weather, 2022 is the hottest year in the past 50 years, and the continuous high temperature has led to drought, and the drought situation is very severe, if it does not rain again, I am afraid that it will dry up directly.

Most of the drought is caused by high temperatures, which evaporate relatively quickly. Due to the rapid evaporation of the water surface, the water source in the Yangtze River basin has gradually entered a period of drought, and the rainfall in hot weather is gradually decreasing, and the water supply in the Yangtze River basin is not very sufficient.

Recently, the weather has been relatively hot, and the drought in the Yangtze River basin has also become very severe, and the rainfall in this weather is inversely proportional to the rate of evaporation of the water surface, so the drought in the surrounding areas will be very serious.

1. Hot weather.

Due to the continuous emergence of high temperature weather in recent days, the drought in the Yangtze River basin will gradually increase, because the high temperature weather will evaporate the water source of the Yangtze River basin, so with the passage of time, the higher the temperature weather, the longer the duration, the faster the water surface evaporation, and then the drought in the Yangtze River basin will become more and more serious, this is a chain effect, in recent times there have been high temperatures in many places in China, such as the temperature in Chongqing, Sichuan is very high. <>

Second, the rainfall is reduced.

Due to the high temperature weather, the continuous rainfall will also be reduced, many places have not rained for more than 10 consecutive days, so in this case, there is not much water to replenish the Yangtze River Basin, so as time goes by, the high temperature weather continues, and the water in the Yangtze River Basin will become less and less, so in the Yangtze River Basin, the surrounding drought will become more and more serious, so it affects the surrounding crops and residents' water use. <>

3. Evaporation on the water surface.

Due to the high temperature of the day, so under the exposure of the sun, the speed of water surface evaporation is very fast, once the water surface evaporation rate is too fast, it will gradually decrease, especially in the Yangtze River basin exposed to the outdoors, the water source of the Yellow River basin is easy to become less and less under the continuous high temperature, so if the high temperature weather continues, the water surface evaporation will continue, so that the drought will become more and more serious. <>

Insufficient soil moisture can not meet the needs of pasture and other crop growth, resulting in a large reduction or extinction of yield. Drought is a widespread natural disaster, which not only affects agriculture, but also seriously affects industrial production, urban water supply and the ecological environment. In China, the normal growth of crops affected by water shortage during the growing period is usually called drought, and the reduction of yield by more than 30% due to drought is called disaster.

Areas where drought is frequent are called drought-prone areas.

High temperature and little rain. Prolonged periods of high temperatures in the Yangtze River basin, coupled with no rain, have caused drought in the region.

Because the weather is too hot, some of the small rivers have dried up and the water has evaporated, which has caused a drought situation, and we should take certain measures to save it.

The main reason for the drought is that there is relatively little rain in the area, and the weather is particularly hot, even reaching a high temperature of more than 40 degrees, and this drought will not last long.

The first point is that there is a rare drought, the most important thing is that there is no rainfall, and the second point is that the weather temperature is too high, so it will cause drought The third point, no one can say how long the drought in the Yangtze River basin lasts.

The first point is that the drought is definitely due to the weather, and the second point is that the occurrence of such a thing must have a lot to do with the whole air.

Nowadays, affected by the high temperature weather, many areas of our country are relatively short of water, and there is a drought in some places, which has a huge impact on crops or livestock and even people's water use, such as the drought in the Yangtze River Basin, tens of millions of acres of land suffer from drought, and there are three main countermeasures to deal with this, the first is to transfer other places into the drought-stricken places to ensure everyone's water use; second, to open up new water sources in some places with good water sources to increase water withdrawal; The third is to encourage everyone to save water and use it wisely, so as to ensure that the people's water and crop yields are not affected.

First, the Yangtze River basin is in drought, and tens of millions of acres of land are suffering from drought, and the first countermeasure to this is to transfer water from other places to places where there is drought.

In view of the drought in the Yangtze River Basin, the Water Conservancy Bureau and the local government have discussed how to ensure the water supply of the masses and crops as early as possible, and have studied and implemented countermeasures, the main countermeasure is to transfer water from the upstream reservoir into the Yangtze River where there is drought, and use these accurately in place, so as to ensure the normal growth of crops and the people's daily water is not affected.

Second, the second is to open up new water sources in areas where there is drought and provide water to everyone.

According to the characteristics of the long duration and large scope of the drought, the first countermeasure is not only to transfer water from other places, but also to take some measures in the local drought, that is, to open up new water sources in some places with better water sources, such as digging wells, so as to supplement the local water sources, so that the people's water has been effectively alleviated.

Third, the last is to encourage everyone to save water in their daily lives, so as to ensure the water supply of everyone and crops.

Water conservation has always been the traditional virtue of our country, now in the drought is more valuable, in addition to the transfer of water from the outside, but also encourage everyone to open source and throttle, that is, from the small things to save water, do not extravagant waste, so that the internal and external efforts together, in order to cope with the drought, it is also recommended that everyone even if there is no drought to save water, this is a virtue to carry forward.

The Yangtze River basin has suffered from a severe drought, and tens of millions of acres of land have suffered from drought, and drought monitoring has been carried out, and rescue strategies such as artificial rainfall have also been implemented.

The corresponding policy is to optimize and standardize the order of water use, and accurately dispatch water conservancy projects.

The first point, the best countermeasure is to set up artificial rainfall, and then achieve a drought-resistant effect, the second point is to take river transportation, and then the drought can be minimized.

Reasons: (1) The monsoon climate is unstable, the southeast monsoon is weak, and the precipitation is less;

2) The temperature rises and the evaporation is large;

3) During the water-demand period of crops, agricultural water consumption is large;

4) The industry is developed and the industrial water consumption is large;

5) There are many cities, high population density, and large domestic water consumption;

6) The vegetation in the middle and upper reaches of the Yangtze River was seriously damaged and soil erosion was serious.

Measures: (1) Implement artificial rainfall at appropriate times;

2) Strengthening**;

3) reduce the amount of water diverted from the south to the north to ensure that the middle and lower reaches of the Yangtze River survive the water shortage period;

4) Rational use of reservoirs and dams to regulate water volume.

1.The monsoon climate is unstable, and the southeast monsoon is weak, bringing little precipitation.

2.In the middle and lower reaches of the Yangtze River, there are tall mountain ranges, which block the entry of water vapor and have little precipitation.

3.Global warming, rising temperatures, and high evaporation.

4.In the middle and lower reaches of the river, lakes are enclosed to create fields, destroying vegetation and leading to soil erosion.

5.The region is industrially developed, densely populated, and consumes a lot of water.

The current drought is mainly due to the weak activity of warm and humid airflows, resulting in less precipitation, but it is not yet a drought. In fact, it is not yet the rainy season, and it is estimated that the precipitation will gradually increase after the beginning of the rainy season. The middle and lower reaches of the Yangtze River are controlled by a single summer monsoon and lack the conditions for clouds to cause rain, so drought is formed.

The measures that can be taken now are the rational use of water from water stocks and the use of groundwater. There is currently no cure for the root cause.

Reasons: 1. Climate. This year, the atmospheric circulation is abnormal, the subtropical high is located in the south, and the summer monsoon is weak. As a result, there is not enough water vapor to be transported to the continent, and it is difficult to form sufficient precipitation.

2. Water conservancy construction. The Three Gorges Dam in the upper reaches of the Yangtze River has intercepted large amounts of water, resulting in a reduction in downstream flows. In order to compensate for the loss of the main stream, the water loss of the tributaries of the middle and lower reaches of the Yangtze River basin has accelerated. This has led to the expansion of arid areas.

3. Water use. The middle and lower reaches of the Yangtze River basin are densely populated and economically developed, and the water consumption is very large. Residents and businesses in these areas do not pay attention to water conservation, which exacerbates the drought.

Countermeasures: 1. We can't change the weather completely controlled, but we can control it locally, which is artificial rainfall. Therefore, it is necessary to seize the favorable time to carry out artificial rainfall.

2. The water resources in the Yangtze River basin should be uniformly dispatched. All reservoirs, including the Three Gorges, must obey the mobilization and appropriately release water to alleviate the drought situation.

3. Pay attention to water conservation and make good use of every drop of water.

Reason: 1 sub-high control: continuous sunny days, less rainfall: 2 The middle and lower reaches of the Yangtze River have developed industry and agriculture, and more water consumption: 3. Large population and large living water consumption.

Measures: 1 Implement cross-basin water transfer, 2** increase the construction of water system projects: 3. Strengthen citizens' awareness of water conservation.

Natural causes: monsoon climate The climate varies greatly from year to year.

Anthropogenic causes: Downstream lake enclosure and land reclamation, vegetation destruction, poor water conservation capacity, strong global warming and evaporation.

Measures: Afforestation, environmental protection, construction of dams, strengthening of water conservancy projects, strengthening forecasting and monitoring.

Natural disasters.

Natural disasters Abnormal weather.

Man-made disasters Environmental damage Originally, many rivers and lakes, especially the Dongting Lake area, have been greatly reduced, and you can find special information to see. When the flood comes, the water is released, and when the rain does not come, the drought is the typical nature of the water conservation capacity is destroyed, and the vegetation is destroyed, and the ability to conserve water is also seriously damaged.

measures, do you think that human beings can compete with nature? It's all about protecting nature, and the rest is a drop in the bucket.

The warm and humid airflow is not enough to form large-scale rainfall, and there are different degrees of drought in the southeast, northwest and northwest of the country this year, and the lack of warm and humid airflow is the key reason. After the arrival of the Meiyu front in mid-June, coupled with appropriate artificial rainfall enhancement operations, the drought situation in the middle and lower reaches of the Yangtze River can basically be solved. Otherwise, China's "land of fish and rice" will be gone.

First of all, the atmospheric circulation system affecting eastern China is extremely significant.

At present, the position of the subtropical high in the western Pacific (,) is more northerly and stronger than the multi-year average, and the western ridge point is westerly. In the middle and lower troposphere, there is an anticyclonic anomaly circulation, which leads to the occurrence of no precipitation and low precipitation for a long time, resulting in drought conditions. In previous years, due to the influence of the subtropical circulation system, the southern part of the Yangtze River would form a long-lasting spring rainfall in spring.

Secondly, the water vapor transport conditions are insufficient, and the water vapor channel cannot be effectively established.

During the transition period between spring and summer, with the development of the tropical convection system and the outbreak of the South China Sea summer monsoon, there are usually three channels affecting water vapor in China: the southwesterly airflow of the Somali equatorial cross, the southwesterly airflow of the Vietnamese equatorial south of the Bay of Bengal, and the southwesterly airflow from the south of the subtropical high near the South China Sea and its east.

According to the analysis and diagnosis of the troposphere water vapor budget in the arid region of the middle and lower reaches of the Yangtze River by the Climate Monitoring Office of the National Climate Center, there is a large water vapor loss in the region in May, so there is a lack of material conditions for precipitation.

In addition, since the beginning of this year, the cold air activity has been significant and powerful, and it is impossible to form a situation of cold and warm convergence in the middle and lower reaches of the Yangtze River.

The process of rain formation is the result of cold and hot air PK, the hot air flowing from the ocean meets the strong cold air, then he will quickly condense to form rain and snow, if the surface water flow is less or the surface temperature continues to rise due to human production activities, then he will lead to the formation of cold air ability is weak, the formation of cold air is simply PK but the inflow of hot air from the Pacific Ocean, so they can not quickly condense to form rain and snow weather. That's why drought persists where it's dry.

Reason: Drought weather in July and August is the main (i.e. the instability of the monsoon climate).

Measures: Afforestation, construction of dams, strengthening of engineering construction, mitigation of weather forecasting and monitoring, artificial rainfall, and many more.

Cause: Abnormal activity of warm and humid airflows, resulting in drought.

Measures: rational use of reservoirs and groundwater; Afforestation, construction of dikes, artificial rainfall.

Due to the abnormal summer monsoon activity, the landfall of the southeast monsoon was delayed, resulting in the delay of the plum rain and the drought of the middle and lower reaches of the Yangtze River.

Of course, there are also man-made reasons, such as water consumption for spring sowing, water consumption for light and heavy industries, and water for people's daily life.

Reason: Due to the completion of the Three Gorges Dam, the water in the middle and lower reaches has decreased.

Measures are generally divided into: engineering measures and non-engineering measures.

2012 is coming, and it's a harbinger.

Countermeasures for severe drought in the middle and lower reaches of the Yangtze River.

After the dam was built in the upper reaches of the Yangtze River, its water surface expanded, but the expanded water surface area is still much less than that of the middle and lower reaches of the Yangtze River, which has reduced the flow of water and reduced the flow of wetlands, which affects the evaporation of water vapor in the environment and ultimately affects the weather. If the climate deteriorates year after year, it will go from bad to worse, and the consequences will be unimaginable.

The flow of the middle and lower reaches of the Yangtze River should be restored to the normal level before the dam was built, so that the water surface, wetlands, vegetation and irrigated area along the river will be restored to their original condition, the water vapor will evaporate back to the normal level before the dam was built, and the weather will return to normal. Therefore, it is not a temporary water replenishment and short-term drought resistance, but an eternal Yangtze River operating principle, otherwise the environment and weather will become more and more out of control. （baotu）