China News Service, Zhengzhou, October 6th (Kan Li) Affected by continuous rainfall, the Yellow River Conservancy Commission of the Ministry of Water Resources (hereinafter referred to as the Yellow Committee) has recently continued to issue flood warnings.

On the 6th, the Yellow Committee notified that flood No. 3 had occurred in the Yellow River.

  According to the Yellow Committee, due to the combined influence of the Wei River and the north main stream of the Yellow River, the flow of the Yellow River Tongguan Hydrological Station reached 5,090 cubic meters per second at 23:00 on October 5, and the water will continue to rise in the future.

According to the "Regulations on Flood Numbering of Major Rivers in the Country", the flood numbering standard is reached, forming the Yellow River's No. 3 flood in 2021.

  It is reported that the flow of the Yellow River has exceeded 4,700 cubic meters per second for 7 consecutive days, and the large flow process will continue for more than 15 days, with high water levels and long durations, and the flood control situation is severe.

  The day before, the Yellow Committee successively issued blue and yellow flood warnings in the lower reaches of the Weihe River.

The Yellow River Flood Control and Drought Relief Headquarters held a flood control video conference on the same day.

At the meeting, the Yellow River Basin Meteorological Center reported the recent weather conditions in the Yellow River Basin, and the four provinces of Shanxi, Shaanxi, Henan, and Shandong introduced the flood control situation in the Yellow River Basin in their respective provinces.

  Wang Kai, the commander-in-chief of the Yellow River Defense and Governor of the Henan Provincial Government, said at the meeting that the situation in the autumn flood season of the Yellow River this year is difficult.

We must strictly guard against death, and resolutely ensure that the Yellow River floodplains will not flood, projects will not run dams, the river regime will not change, and personnel will not die.

To the greatest extent possible to block floods, shift peaks, and cut peaks.

  The Henan Meteorological Observatory forecasted that from 08:00 on the 5th to 08:00 on the 6th, light rain occurred in most of the province, moderate rain occurred in Puyang, Anyang, Hebi, and the eastern part of Xinxiang, and heavy rain occurred locally.

The province's average precipitation is 3 mm.

  According to forecasts, from the afternoon to night on the 6th, there will be showers or light rain in Henan Province on cloudy days, moderate rains and local heavy rains north of the Yellow River, Sanmenxia and Luoyang areas, and parts of the west of Zhengzhou, Pingdingshan, and Nanyang.

Affected by the rainy weather and cold air, the temperature in most parts of Henan Province will be low in the next two days, and the rainfall will weaken on the 8-9th.

  The new round of rainfall in the middle and lower reaches of the Yellow River will put a lot of pressure on flood control of the Yellow River.

At present, seven working groups sent by the Ministry of Water Resources are guiding the flood prevention work in the four provinces of Shaanxi, Shanxi, Henan, and Shandong.

  Prior to September 27, the Yellow River experienced floods No. 1 and No. 2 in 2021 one after another.

So, what is the numbering flood?

According to the "Regulations on Flood Numbering of Major Rivers in the Country", the warning water level (flow) reached by the major rivers and lakes across the country and the main rivers that flow into the sea alone can be defined as the flood numbering standard.

  The Yellow Committee stated that the flood number is composed of three parts, the name of the river (lake), the year of the flood, and the sequence number of the flood.

As far as the Yellow River is concerned, when the upstream Tangnaihai Hydrological Station or Lanzhou Hydrological Station reaches 2500 cubic meters per second; the middle reaches Longmen Hydrological Station or Tongguan Hydrological Station reaches 5000 cubic meters per second; the downstream Huayuankou Hydrological Station reaches 4000 cubic meters per second , When one of the above three conditions is met, flood numbering is required.

  Some experts have explained this. For the flood control department, the occurrence of numbered floods means that there is a possibility of danger in the Yellow River embankment. It is necessary to strengthen the inspection of the embankment and do a good job in flood prevention.

(over)

Keywords: