China News Service, Beijing, July 20th. Title: Zhengzhou initiates the first-level flood control emergency response. Why has Henan become the center of heavy rainfall in China?

  China News Agency reporter Chen Su

  In recent days, Henan has experienced continuous heavy rains, and the red warning of heavy rain has been issued continuously, becoming the center of heavy rainfall in China, and many places have entered the "sea-watching mode".

At 17:00 on the 20th, Zhengzhou, Henan Province upgraded the second-level flood control emergency response to the first level, reaching the highest level of emergency response.

How severe is the rain in Henan this round?

What does it mean for Zhengzhou to launch the first-level flood control emergency response?

How will China respond to heavy rainfall in Henan?

  ——Break through historical extremes

  Since the 17th, Henan has experienced continuous heavy rainfall, with heavy rains and heavy rains in many places, and heavy rains in some areas. According to statistics, there are 4,098 rainfall stations with precipitation exceeding 50 mm, and 1923 with more than 100 mm and more than 250 mm There are 606 of them.

  At the same time, this round of extreme rainfall in Henan is prominent.

As of the 20th, monitoring for 3 consecutive days (data as of 11 o'clock on the 20th) showed that Songshan (512.2 mm), Gongyi (358.9 mm), Xinmi (324.8 mm), Yanshi (290.4 mm), and Dengfeng (288.3 mm) 5 A national weather station broke the historical extreme value of accumulated precipitation in the three days since the station was established.

  According to the monitoring of the Meteorological Department, as of 14:00 on the 20th, the 24-hour average rainfall in Zhengzhou reached 253 mm, which is close to the magnitude of the extreme heavy rainfall. The rainfall reached 201.9 mm in the hour from 16:00 to 17:00, and the single-day rainfall exceeded the historical extreme. Since), the single-hour rainfall exceeds the daily historical extreme value, and the rainfall intensity is rare in history.

The Zhengzhou Municipal Government issued an urgent reminder that Zhengzhou encountered heavy rainfall that was unprecedented in a century, and the situation is grim.

  ——What does it mean to initiate a flood prevention level I emergency response?

  Emergency plans for flood prevention in various parts of China are formulated with reference to the national emergency response level for flood prevention. The national emergency response level for flood prevention is divided into four levels: level IV, level III, level II and level I, of which level I is the highest level.

  According to the "Emergency Plan for Flood Control in Henan Province", a Class I emergency response is required to initiate a particularly severe flood disaster. The main situations are as follows: severe flood disasters occur in major river basins or multiple areas, resulting in major flooding of crops, disasters to the population, and urban waterlogging. Disaster conditions; major flood control rivers and important river sections have over-standard floods; major flood control rivers and important river sections have dykes breaches; flood storage and detention areas need to be activated; major dangers occur in large-scale reservoirs, or dams in important small and medium-sized reservoirs have collapsed.

  Therefore, under normal circumstances, level I emergency response will only be initiated when the flood disaster is particularly severe.

In 2020, in the face of the worst flood situation since 1998, Sichuan Province launched the first Level I emergency response in history.

  According to the Henan Provincial Water Resources Department, there are already 31 large and medium-sized reservoirs in Henan that have exceeded the flood limit. Dangerous conditions have occurred in some river sections, and floods have occurred in some areas.

Since the 16th, heavy rainfall has caused 287,713 people in 140 towns and counties under the jurisdiction of Zhengzhou, Luoyang, Pingdingshan, Anyang, Hebi, Jiaozuo, Sanmenxia, ​​Nanyang, Xinyang, Zhoukou, Zhumadian, and Jiyuan Demonstration Zone.

In Zhengzhou City, the water level of many rivers continued to rise and appeared dangerous, many reservoirs exceeded the flood limit water level, and water accumulation in the urban area was serious.

  --how to respond?

  According to regulations, the flood control command organizations of relevant provinces, autonomous regions, and municipalities directly under the Central Government, and the flood control and drought relief command organizations of provinces, autonomous regions, and municipalities have initiated a level I response. They can declare that the region has entered an emergency flood control period, increase the number of personnel on duty, strengthen the duty, and mobilize and deploy flood control Drought relief work; dispatch water conservancy and flood control projects in accordance with authority; transfer people in dangerous areas according to the plan, organize and strengthen dyke inspections and levee defense, timely control danger, or organize and strengthen drought relief work.

The heads of flood control and drought relief command institutions at all levels and the heads of member units in the disaster-affected areas shall, in accordance with their responsibilities, organize and direct flood control and drought relief work in their respective areas, or stationed in specific areas to help the hardest-hit areas do a good job in flood control and drought relief work.

  With Zhengzhou's emergency response to flood control level I, more than 20,000 people from the local sanitation, electricity, communications, water supply, and municipal administration have rushed to the front line of flood control to fully respond to torrential rains and floods.

  Experts reminded that Henan has been hit by heavy rainfall in recent days, and the Yellow River Basin, Huai River Basin and Funiu Mountain Area have high risks of flooding, flash floods and geological disasters. It is necessary to strengthen inspections and risk elimination of disaster hidden danger points, and timely transfer people in dangerous areas; strengthen; Reservoir and river rain water regime monitoring and water conservancy project safety monitoring, while strengthening traffic diversion and safety management to prevent the adverse effects of heavy rainfall.

Citizens need to stay at home or in a safe place as much as possible, pay attention to the surrounding environment, and improve disaster prevention, avoidance, and self-rescue capabilities.

  ——How long will the heavy rainfall last?

  Talking about why the rains in Henan this year are so "fierce", Zhang Ning, chief forecaster of the Henan Meteorological Observatory, told reporters from China News Agency that the western Pacific subtropical high and the continental high were stably maintained in the Sea of ​​Japan and northwestern China, blocking the movement of the upstream system. As a result, the low-value system of the westerly zone has been maintained for a long time in North China and the Huanghuai area.

Affected by the deep easterly jet and stable low vortex shear, combined with the strong convergence and uplifting effect of the special topography of the Taihang and Funiu Mountains in Henan Province on the easterly airflow, the heavy precipitation centers are mainly distributed in the western and northwestern regions of Henan Province. The mountain area is stable and less moving, causing long-term precipitation in Henan Province.

  Zhang Ning said that the heavy precipitation is expected to continue until the night of the 21st. The heavy precipitation areas are still in northwest and central Henan, and the precipitation can reach 100 to 250 millimeters, and locally 300 to 400 millimeters.

From the 22nd to the 26th, there was no obvious large-scale heavy precipitation weather in Henan Province, and there were polydispersive thunderstorms in the province.

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