There was a sudden rainstorm in Putian, Fujian, and the streets became rivers. What is the local rainfall intensity?

Many parts of the country suffered from heavy rain and extreme weather. There was a sudden rainstorm in Putian, the streets were flooded, the trash cans were washed away and turned into "boats" wandering in the streets.

Meteorological News According to Putian meteorological news, Putian Meteorological Observatory issued a rainstorm red warning signal: Changtai Town in Chengxiang District has a rainfall of 59 mm, and it is estimated that there will be 40-60 mm of heavy precipitation in Changtai Town in Chengxiang District and Zhuangbian Town in Hanjiang District in the next three hours.

Subsequently, the Putian Meteorological Observatory lifted the red rainstorm warning at 8: 00. It is understood that Putian terrain is high in the northwest and low in the southeast, and its cross section is saddle-shaped. Located on the northern edge of the Tropic of Cancer, facing the ocean in the east, it has a humid climate and belongs to a typical subtropical maritime monsoon climate.

Daily warning amount The precipitation in the upper reaches of the city exceeds the daily warning amount in a short time, and the rainwater quickly flows into rivers and lakes, passes through the city and exceeds the warning water level to flood the city or burst its banks to flood farmland and towns, which is called flood. Therefore, the formation of flood requires two conditions, one is heavy rainfall in a short period of time. One is that urban dams are flooded or washed away.

Reason 1. The first reason is that through scientific analysis, prediction and judgment, flood warning can be issued in advance, flood discharge and hedging can be planned in advance, so that the flood can be diverted before passing through the city, and the warning water level will not be exceeded as much as possible, which will not cause harm to the city.

2. The second reason is hard to overcome. How many kilometers is the dam along the river lake? It is unrealistic and impossible to build them all to resist the once-in-a-century flood. At least in the short term, it is impossible to complete.

So it is unlikely to avoid flooding. Because it depends on the sky. Environmental pollution and El Nino phenomenon are getting more and more serious year by year, which leads to more and more abnormal weather days around the world and the increase of extreme climate. Flood is just one of them. Protecting the environment is everyone's responsibility, not empty talk.