The rainfall per hour exceeds 2 mm, what is the expert's explanation?
On July 17th, heavy rainfall began to appear in Henan Province, China. Suddenly, heavy rain poured down and floods crossed the river. Serious floods occurred in Henan Province, which caused geological disasters in many places. The people of Henan Province were seriously affected, which attracted the attention of the people of the whole country. The people of the whole country also began to help Henan, and the people were United in fighting floods, showing that fire and water were merciless and human beings were the warmest in the world.
On July 2th, from 16: to 17: , the hourly rainfall in Zhengzhou, Henan Province exceeded 2mm. Such a huge amount of rainfall has rarely happened, and some of it is shocking, which has exceeded the record of the maximum rainfall in one hour in recent years. Not only Zhengzhou was hit by such a severe flood, but also many cities in Henan, including Anyang, Jiaozuo and Xingyang, were affected by the flood.
Experts have also done some research on the causes of such extreme violence in Henan and given some authoritative explanations.
The rainfall in Henan has a long duration, a large rainfall intensity and a wide area. At the same time, it is accompanied by thunderstorms, strong winds and lightning. Such extreme weather has caused serious floods and induced more destructive geological disasters.
According to experts, the main reason for this is that the subtropical high and continental high from the western Pacific Ocean have always been maintained in the Sea of Japan and the northwest of China. Due to the influence of high pressure, the factors affecting rainfall have been hovering in a certain range and cannot be moved. They last for a long time in Huanghuai area of North China, and then they are affected by wind and vortex shear, which increases the probability of rainfall. ? With the unique geographical structure of Henan, there is a strong convergence of the eastward airflow, which further increases the rainfall probability.
It can be seen that the heavy rainfall in Henan is influenced by both internal and external factors. These factors exist at the same time, leading to the consequences of heavy rain. Moreover, it is not only Henan that is affected by this, but also the whole North China, including Beijing, Tianjin, Inner Mongolia, Liaoning, Shandong and other places, has experienced heavy rains, accompanied by severe weather such as lightning and strong winds. This influence can't be said to be small, and the scope can't be said to be not wide. In the face of nature, human beings are still small and can't affect the overall situation.
In recent days, the floods have gradually receded, the weather has tended to be gentle, people's hearts have settled down a little, and Henan has begun to repair and rebuild, but the terrible floods will still leave a shadow in people's hearts.
There is not much we can do about the flood disaster. In the future, people need to work hard to do better in weather monitoring, flood control construction and flood resistance. I believe that in the future, people will not just be helpless in the face of heavy rains and floods.