China News Service, Beijing, July 24th. Just a few days after bidding farewell to the main rain belt, the Yangtze River basin is facing strong rainfall. According to weather forecasts, a new round of precipitation process is once again on the Yangtze River Basin, which has increased the pressure of flood control on the large rivers and lakes that are operating at high water levels. As the high temperature range continues to expand northward, high temperature weather will also appear in Jiangnan and North China.
On July 23, aerial photography of flooded villages around Baishan Bridge in Lujiang County, Anhui Province. On the 22nd, a breach occurred in Shidaxu, Tongda Town, Lujiang County, Anhui Province, and floods flooded nearby villages. China News Agency reporter Zhang Yazi
A new round of precipitation returns to the Yangtze River Basin with high risk of mountain torrents and geological disasters
The main rain belt that affects China is swaying from north to south. It has just risen northward for two or three days, and will return to the Yangtze River valley in the next few days.
The Central Meteorological Observatory predicts that from July 24 to 26, heavy rain will occur in the Sichuan Basin to the middle and lower reaches of the Yangtze River along the Yangtze River. Among them, there will be heavy rains in central Chongqing, northwestern Hunan, northeastern Hubei, southern Anhui and other places (accumulated rainfall). The amount is 100-200 mm, and the local area in the central Sichuan Basin can reach 250-300 mm); the maximum hourly rainfall in the above-mentioned area is 30-50 mm, the local area exceeds 70 mm, and the local area will also have strong convective weather such as thunderstorms and gales.
Rainfall forecast map (July 24-26)
Previously, the long Meiyu season has brought large-scale continuous heavy rainfall to the Yangtze River Basin, with large accumulated rainfall, strong extremes, and heavy disaster impact. According to a report from the National Climate Center on July 22, the rainfall in the Yangtze River Basin has been 486.8 millimeters since June, 54% more than normal in the same period, which is the highest in history since 1961.
Meteorological experts reminded that the middle and lower reaches of the Yangtze River and the Dongting Lake, Poyang Lake, and Tai Lake have maintained high water levels for a long time. This round of heavy rainfall from the 24th to the 26th may cause the water level of the mainstream and tributaries of the Yangtze River to rise further and aggravate flood disasters.
Gansu, Shaanxi, Sichuan, Chongqing, Hunan, Anhui and other places also need to prevent secondary disasters caused by heavy rainfall. The China Meteorological Administration, in conjunction with the Ministry of Natural Resources and the Ministry of Water Resources, issued a meteorological warning for geological disasters (yellow) and an orange mountain torrent disaster at 18:00 on July 23.
On July 23, people observed the water regime on the Baishan Bridge in Lujiang, Anhui. On the 22nd, a breach occurred in Shidaxu, Tongda Town, Lujiang County, Anhui Province, and the flood gradually flooded the low-lying areas of nearby towns. Photo by China News Agency reporter Cui Nan
The high water level of the Yangtze River and Taihu Lake runs once in a century
"At present, the water level of the main stream of the Yangtze River has been over-alarm for a long time, and the high water level of Taihu Lake fluctuates." The Ministry of Water Resources held a consultation on the national flood situation on the 23rd, and the arrival of a new round of precipitation will undoubtedly bring challenges to the flood situation of the big rivers and lakes.
At present, the flood situation in the Yangtze River basin is still severe. The Jingjiang and Jiujiang sections of the Yangtze River have continuously high water levels for more than half a month, and the No. 2 flood is evolving.
As precipitation in the upper reaches of the Yangtze River will continue in the next few days, it is not conducive to the timely retreat of flood control capacity of upstream reservoirs, and the flow of the mainstream of the middle reaches of the Yangtze River will increase compared with the previous period.
Meteorological experts believe that the Yangtze River has risks such as high flood level, long duration, impact on the wide section of the river, and continued high flow in the later period. The risks in Jingjiang and Jiujiang are still high, especially the pressure on Jingjiang's flood control continues to increase. At the same time, phased high temperatures, thunderstorms and strong winds will also have an adverse impact on flood control and disaster relief.
From the beginning of the plum rain on June 9 to the beginning of the plum on July 21, the rainfall in the Taihu Lake Basin was 583.8 mm. The total amount, duration, and intensity of the plum rains is 2.42 times the multi-year average. The Shanghai Central Meteorological Observatory (Taihu Lake Basin Meteorological Center) has initiated a first-level emergency response to the Taihu Lake Basin meteorological guarantee.
Ma Leiming, director of the Taihu Lake Basin Meteorological Center and director of the Shanghai Central Meteorological Observatory, said that it is expected that there will be a precipitation process in the basin from the night of the 23rd to the morning of the 24th, and from the 26th to the 27th. In the next week, the area rainfall of the basin can reach 25-45 mm. . Water conservancy hubs in the basin will spare no effort to reduce the water level of Taihu Lake as soon as possible, ease the pressure on flood control, and make full preparations for flood control for the subsequent precipitation process.
In addition, the water level of Chaohu Lake has exceeded the once-in-a-century standard for many consecutive days due to the constant flow of water from the upstream and the high water level of the Yangtze River downstream.
Cao Yuanyue, deputy commander of Chaohu City Defense Command, told the media on the 21st that the guaranteed water level of Chaohu City Defense Standard is 12 meters, and the water level of the lake has reached 13.41 meters, which means that Chaohu Lake is in a "hanging lake" state. On the 22nd, due to the rising water level of Chaohu Lake, the dike of the Baishi Tianhe section in Shidawei, Tongda Town, Lujiang County, Anhui Province collapsed. The river overflowed the dike, forming a gap of more than 20 meters wide, and flooding into many villages.
In the coming week, Chaohu Lake will usher in two successive rounds of heavy rainfall. In this round of rainfall from the 24th to the 26th, the China Meteorological Administration estimates that Chaohu Lake will have a relatively large surface rainfall of 30-50 mm. According to the Chaohu Municipal Government, based on the current real-time water and construction conditions, it is estimated that the water level in Zhongmiao will reach 13.6 meters on the 24th, and the flood control pressure is relatively high.
Data map: On July 13, Fuzhou citizens traveled under the scorching sun. Photo by Zhang Bin
High temperature warning issued for 8 days in a row
At present, in the climate that affects the country, the other leading role is undoubtedly the high temperature weather that is entrenched in southern China and is expanding northward. According to China Weather Network, as of July 23, the Central Meteorological Observatory has issued high temperature warnings for 8 consecutive days.
The Central Meteorological Observatory predicts that in the next three days, there will be high temperatures above 35°C in South China, Jiangnan, Beijing-Tianjin-Hebei and other places. Among them, the highest temperature in some areas of Fujian, Jiangxi, southeastern Hunan, and central and northern Guangdong will be 37～39℃. , The local can reach 40℃. The Central Meteorological Observatory continued to issue high temperature yellow warnings at 18:00 on July 23.
In southern China controlled by the subtropical high pressure, due to the high humidity of the air, the sultry feeling is very obvious. It is a veritable "small heat and great heat, steaming up and down cooking". Shi Yan, a meteorological analyst at China Weather Network, said that since mid-July, the high-temperature weather in southern China can be called "ultra-long standby". The highest temperatures in Fujian and Guangdong have exceeded the historical extremes in 9 counties (districts). The counties (districts) broke through the historical extremes in July.
As the high temperature range continues to expand northward, Jiangnan and North China have also joined the "high temperature group chat." For example, Nanchang, the hot weather will continue until the end of July. The Beijing Meteorological Observatory also issued a blue high temperature warning on July 23: It is expected that from July 24 to July 25, the daily maximum temperature in most parts of Beijing will reach 35°C. the above. (Finish)