More than 1000 kilometers of rivers are cut off, and the precipitation is extremely low! Why is the Yangtze River Basin unusually dry this year?

This summer, a severe drought occurred in many areas. The cumulative runoff in Hunan Province has exceeded 1000 km, the precipitation is unusually low, and there is continuous drought in various places. Let's see why the Yangtze River basin is extremely dry.

The precipitation this summer is much less than in previous years.

I don't know what factors affect this year, and there is little precipitation everywhere. For example, the effective rainfall days in Jiangxi do not exceed 70 days. In previous years, this season was rainy, rainy and wet everywhere, but this year it was extremely dry and there was little precipitation. Moreover, this year's path is unstable, and the stay time in Jianghuai is short, resulting in less rainfall. Moreover, the rainy season is not typical and the rainfall is not obvious, which leads to a severe drought in the Yangtze River basin.

The persistent anomaly of atmospheric circulation in East Asia has led to extreme drought in the Yangtze River basin.

This year, the general high temperature in all parts of the country has increased by several degrees compared with the same period of last year, which is very hot. However, the western Pacific subtropical high has long controlled Jiangnan Jianghuai and other areas. Under the control of this high temperature, the ground temperature is very high, and then it is not easy to form clouds. The sun's radiation can easily reach the ground, so the high temperature is very strong and frequent. Large-scale and long-lasting high-temperature weather occurred in various places, and the Yangtze River basin suffered from severe summer drought.

Water source conditions and drought resistance are insufficient.

This summer, the widespread high temperature and lack of rain led to extreme drought in many places, as did the Yangtze River Basin. I think one of the possible reasons is that drought has something to do with poor water conditions caused by the lack of water conservancy facilities. Although it is very dry, it may be that the drought has not been solved in time, or it may be that the facilities and manpower are insufficient to resist the drought, which has caused a severe drought in the Yangtze River basin. Therefore, the drought resistance level of facilities should be improved, which can alleviate the degree of drought.