More than 1,000 kilometers of rivers are cut off, and the precipitation is abnormally low! Why is th

In the summer of this year, there was an extreme drought in many areas, and the cumulative flow in Hunan Province has exceeded 1,000 kilometers, and the precipitation is abnormally low, and the drought continues everywhere, so let's take a look at why the Yangtze River basin is here.

Extreme drought. This year's summer rainfall was much lower than usual.

I don't know what factors are affected this year, the precipitation everywhere is very small, for example, the number of effective rainfall days in Jiangxi does not exceed 70 days, this season in previous years is the plum rainy season, rainy and rainy, wet everywhere, and this year is abnormal drought, precipitation.

There are extremely few, and this year's tracks are not stable in JAC.

The stay time is not long, so the rainfall is on the low side, and the plum rain is not typical, the rainfall is not obvious, resulting in extreme drought in the Yangtze River basin.

East Asian atmospheric circulation.

The persistent anomaly led to extreme drought in the Yangtze River basin.

This year, the general high temperature temperature in all parts of the country has increased by several degrees compared with the same period in previous years, which is very hot, and the western Pacific subtropical high pressure.

Long-term control of Jiangnan, Jianghuai and other areas, under the control of this high temperature, the temperature of the ground is very high, and then it is not easy to form clouds, the sun's radiation is relatively easy to reach the ground, so the high temperature is very strong, and very frequent, everywhere is a wide range, long duration of high temperature weather.

The Yangtze River basin is suffering from a severe summer drought, so the Yangtze River basin is extremely dry.

Water conditions and drought resistance are insufficient.

I think one of the possible reasons is that the drought is also related to the poor water source conditions caused by the lack of water conservancy facilities, although it is very dry, but the drought has not been solved in time, and it may also be that the facilities are insufficient, the manpower is insufficient, and the drought cannot be resisted, so it has caused the extreme drought in the Yangtze River basin. Therefore, the level of facilities should be upgraded to be resistant to drought, so that the severity of drought can be reduced.

The middle and lower reaches of the Yangtze River have been affected by high temperatures, which have also caused the water level to continue to drop. It is also prone to summer droughts, which were severe in 2013 and 2019.

This extreme weather is mainly due to the relatively dry weather and relatively low precipitation in the Yangtze River basin.

It seems that the ecological environment has been damaged, and then the local temperature has reached more than 40 degrees.

First, this year's subtropical high.

Very strong, the west extension of the north extension controls 30 degrees north latitude.

The left and right are a little faster, and there is no front line that pulls back and forth, and there is not much rain, resulting in no flood season in the Yangtze River basin and a major drought in the whole Yangtze River basin!

Second, from the Indian Ocean.

The southwest warm and humid airflow also controlled the south of the Yangtze River too early because the subtropical high could not enter the Yangtze River basin, so there was little rain.

Third, tropical cyclones and typhoons in the western Pacific Ocean are also unable to enter the continent because the continent is controlled by the subtropical high.

The main culprit is that the subtropical high came early, extending from the west to the north and expanding to the south, resulting in little rain in the whole basin of the Yangtze River, forming a major drought in the whole basin!

Because of the global high temperature this year.

This year's drought is severe because of the high temperatures this year.

Overall, this year's drought is particularly severe due to two factors, high temperatures and low rainfall. The main reason for this is the increase in temperature. Specifically, this year's severe drought is due to these reasons:

Firstly, the global temperature has increased due to the increase in China's temperature, secondly, the flow of inland high pressure zone to the coastal low pressure zone has led to less precipitation, and finally the atmospheric circulation has intensified. Here's how it works:

Clause. 1. The severe drought this year is due to the increase in global temperature, and the temperature in China has also risen: the global average temperature has continued to rise in recent years, increasing by annual degrees Celsius, and meteorological experts expect that the temperature will continue to increase for a long time in the future.

Because the temperature in my country has also been affected, the temperature in my country has also remained at a high level this year. In addition to the high temperatures, the combination of high temperatures and precipitation has led to a severe drought this year. The rise in global temperature is also due to the fact that carbon emissions cannot be controlled with the development of the times, and carbon dioxide has caused the greenhouse effect.

As a result, the temperature in our country has also risen along with the global temperature.

Clause. 2. The severity of this year's drought is due to the flow of the inland high pressure zone to the coastal low pressure zone: along with this flow, the water vapor in the atmosphere is either lost in the flow or concentrated in the coastal areas, and the result is a decrease in precipitation in the inland areas, which causes a drought.

Because of the high temperature this year, water vapor transpiration in inland areas is violent, and the water vapor collects in the atmosphere, resulting in an increase in atmospheric pressure and a large pressure difference, so the inland atmosphere flows to the coastal depression area, resulting in a decrease in water vapor loss and precipitation.

Clause. 3. This year's drought is severe because of the intensification of atmospheric circulation: because of the increase in global temperatures, the speed of global atmospheric circulation has also intensified.

When an area has accumulated enough water vapour to prepare for rainfall, atmospheric circulation disperses the vapour again. Therefore, the intensification of atmospheric circulation makes it difficult for water vapor to accumulate, so the precipitation in China decreases. As a result, this year's drought has been severe.

It is mainly because of climate change that this year's drought is particularly severe, and if it continues, it will make the affected area more and more extensive, and the crops will not be harvested, and the impact on the local economy will also be very large.

China's current water resources can survive indefinitely.

In the wake of the rare heat and drought in the Yangtze River basin, many people are aware of the importance of protecting water resources, and since China is a country with very little water per capita, many people are worried that China's current water resources will be depleted.

Although water resources are extremely important for human survival, they are not non-renewable resources. Because water resources cannot disappear in a vacuum, but will exist in another form, it is precisely because water resources are recyclable that China's current water resources can survive indefinitely. <>

If water resources are not protected, there is a risk that water resources will be polluted, and if polluted water resources are used by humans, then our health will be seriously problematic. Although water resources can survive indefinitely, this is not the case with polluted water resources, so protecting water resources is protecting ourselves. <>

Although we use a lot of water every day, it doesn't mean that the water used is wasted. And those used water resources through evaporation, into the circulation system, after the completion of the water resources cycle, water resources will inevitably return to our side, because water resources can be effectively replenished, so China's water resources can be sustained indefinitely. <>

We don't need to worry about water depletion, as long as we protect it, we can always enjoy clean water. If there is no protection of water resources, then even if they can be recycled, it will not bring us healthy results.

It can last for hundreds of years, but if the heat persists, the water may not last long, and it will also lead to soil drying up and death, and according to the latest data released by the state, the current drought situation is generally manageable.

At present, China's water resources can still last for a while, and the impact of this high temperature weather on the local area is also very serious, it is recommended that the relevant departments should strengthen the protective measures in this regard, to avoid causing more serious high temperature impact, resulting in a serious shortage of human water resources.

It won't last long, but it should be okay in the short term. The main thing is that the continuous high temperature makes people more easily irritable.

I feel that China's water resources can still support many years at present, because China is not very short of water.

The drought in the Yangtze River basin is the most severe since 1961, and the meteorological drought in the Yangtze River basin has brought the following impacts to the local area.

The Yangtze River region has experienced its biggest drought since 1961. Sichuan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, 6 provinces, 12.32 million mu of cultivated land affected by drought, 830,000 people, 160,000 head of large livestock affected by drought.

The average annual precipitation of major cities on the Yangtze River is lower than the average by 50%, and the average precipitation in Nanchang, Fuling and Wulong has decreased by more than 80%, and the average precipitation in previous years is more than 200 mm, while this year it is only 30 40 mm. In addition to a significant reduction in rainfall, the persistence of high-intensity high temperatures has led to a rapid development of the arid climate.

At this time, the middle and lower reaches of the Yangtze River are the critical period for the formation of autumn grain production and autumn harvest crop yield, and it is also the most sensitive period to high temperatures, and crops need a lot of water. The dual effects of continuous high temperature and heat damage and drought have reduced the pod setting rate and grain weight of rice, corn, soybean and other crops, and increased the bud boll shedding of cotton, resulting in a decrease in boll formation and premature senescence, thereby reducing yield.

At present, most of the first-season rice in Sichuan, Chongqing and other southwest regions have begun to fill grain, some have entered the milk maturity stage, maturity stage, a few in the heading, flowering stage, it is the most sensitive to temperature, water response time, continuous high temperature and drought will make the rice seed setting rate and 1000-grain weight decrease, the yield of rice has an adverse effect.

Water levels in the main stream of the Yangtze River and in Dongting and Poyang lakes are at historically low levels, and small reservoirs in some places are experiencing large shortages of water storage.

In some areas that rely on hydroelectric power, power is scarce. Eighty percent of the country's electricity comes from hydroelectric power, and this year's rare heat and drought has caused a serious shortage of water in all major river basins, reducing the province's hydropower capacity by 50 percent. A series of orderly power restrictions have been adopted in places such as Dazhou, thereby easing the pressure on power supply.

The impact of meteorological drought in the Yangtze River basin on the local area: high temperature and drought have had a significant impact on the production and life of local people. The area of extreme drought has reached 10,000 square kilometers.

The drought in the Yangtze River basin is very serious, and it also has a very serious impact on the local area.

The water level in the Yangtze River basin is lower than that in the same period, and the farmland is dry, and the output of crops and aquatic products in the Yangtze River basin will be reduced.

The drought in the Yangtze River basin is mainly characterized by early occurrence, large drought area, long duration, and wide range of drought. In early June 2022, the Yangtze River basin already experienced low precipitation, and the water level in the middle and lower reaches of the Yangtze River is also declining, which is significantly lower than in the past. Not only has the precipitation in the Yangtze River basin been seriously reduced, but the temperature in the Yangtze River basin is also very high, with some areas lasting high temperatures for more than 15 days, while in the middle and lower reaches of the Yangtze River, the high temperature weather has exceeded 25 days.

The drought in 2022 was exceptional, not only covering the upper reaches of the Yangtze River Basin, but also affecting the middle and lower reaches of the Yangtze River Basin, resulting in water shortages in many areas. The drought situation is still ongoing and will affect all aspects of agriculture and the ecological environment, as well as the daily water use of people and livestock. According to statistics on August 11, 2022, the area covered by the drought has reached 644,670 hectares, resulting in the water supply of 830,000 people being affected to varying degrees.

Agricultural production in many regions such as Sichuan and Chongqing has inevitably been affected, and crops have reached a period of being very sensitive to moisture and temperature, but in the case of little rain, it will lead to a significant decrease in seed setting rate, which will lead to a decrease in the yield of the next season. Crops in many areas of the middle and lower reaches of the Yangtze River are also in the maturity stage, so high temperatures can lead to natural growth of crops. Precipitation in the Yangtze River basin is relatively low, which also leads to the depletion of water sources in small reservoirs, resulting in lower water supply for people in remote areas.

Sichuan Province is the most seriously affected, about 10,000 people have been affected by the water supply, at the same time livestock also have drinking water difficulties, with the continuous development of the times, China's water conservancy projects have also been well constructed, so the impact of the current drought is still under control. When rivers dry up, they lead to the destruction of ecosystems, which can have very serious consequences.

Mid-to-late August is a critical period for the formation of autumn grain and autumn crop yield in the middle and lower reaches of the Yangtze River, and it is also a high-temperature sensitive period with large water demand. Continuous high temperature and heat damage combined with drought led to the decrease of seed setting rate and grain weight of medium rice, corn, soybean and other crops, the increase of cotton bud boll shedding, the decrease of boll formation and premature senescence, which affected the yield.