According to the Central Meteorological Observatory's forecast, from September 3 to 5, there will be heavy rainfall in the eastern part of Northwest China and the Huanghuai area.
On September 3, the Central Meteorological Observatory issued a blue rainstorm warning, and the China Meteorological Administration initiated a four-level emergency response.
What are the characteristics of this round of rainfall?
When will it end?
What is the impact of heavy rainfall on river flood control?
What are the hazards of continuous rainfall to crops?
Chen Tao, chief forecaster of the Central Meteorological Observatory, and Yan Hao, chief forecaster of the Ecological and Agricultural Meteorological Center of the Central Meteorological Observatory, interpreted for everyone.
Expert: Chen Tao, chief forecaster of the Central Meteorological Observatory, Yan Hao, chief forecaster of the Ecological and Agricultural Meteorological Center of the Central Meteorological Observatory
Interviewer: Zhang Linhao, reporter of China Meteorological News, Hao Duo, reporter of Xinhuanet
Reporter: Which areas are mainly affected by this round of heavy rainfall? When will it end?
Expert: It
is estimated that from September 3 to 5, there will be significant rainfall from west to east in the eastern part of Northwest China, Sichuan Basin, Huanghuai and other places, and there will be heavy rainstorms locally.
The above-mentioned areas have accumulated rainfall of 30 mm to 60 mm. Among them, the Sichuan Basin, southern Shaanxi, central and eastern Henan, Shandong and northern Jiangsu and Anhui have rainfall of 80 mm to 150 mm, and local rainfall in northeastern Sichuan and southern Shaanxi. It can reach 200 mm to 300 mm, the maximum hourly rainfall is 50 mm to 70 mm, and is accompanied by strong convective weather such as thunderstorms and gales.
The rainfall in northern Shaanxi and Shanxi mainly occurred from day to night on the 3rd, the rainfall in Henan mainly occurred from the night of the 3rd to the 4th, the rainfall in Shandong and northern Jiangsu and Anhui mainly appeared from the night of the 4th to the 5th, and the southern Shaanxi and Sichuan Basin on the 3rd. There will be continuous rainfall from night to the 5th, and the strongest rainfall period is from the night of the 4th to the day of the 5th.
After September 6, the rainfall in the above areas weakened, and the precipitation process on the 7th was basically over.
This round of precipitation process has a wide range of influence. Among them, the precipitation areas in northern Shaanxi, Shanxi, Henan, and Shandong move faster, and the precipitation time generally does not exceed 12 hours. The enhancement characteristics are obvious, accompanied by strong convective weather such as short-term heavy rainfall, local thunderstorms and strong winds.
Reporter: What is the superimposed effect of this round of heavy precipitation process with the previous round of heavy precipitation process (August 21st to 23rd)?
Expert:
In late August, the Sichuan Basin to the Huanghuai area had a lot of precipitation processes and accumulated heavy rainfall. The precipitation was twice to twice as high as the historical period, and more than 4 times in some areas.
The heavy precipitation process from September 3 to 5 and the previous round of heavy precipitation process (August 21 to 23) overlap in the rainfall area. Sichuan, Shaanxi, Henan, Shandong and other places need to prevent continuous rainfall and Strong rainfall may cause mountain floods, geological disasters, floods in small and medium rivers, and waterlogging in urban and rural areas.
After September 6, precipitation from the Sichuan Basin to the Huanghuai area will be significantly weakened, and the rainy weather that lasted for many days in most of the Huanghuai area will basically end, and the weather situation will gradually improve.
Reporter: Which areas are at higher risk of geological disasters? How to defend?
Expert:
This round of heavy precipitation process overlaps with that of the past week, focusing on the impact of heavy precipitation on flood control in the Jialing, Fujiang, Qujiang, and Tuojiang rivers in the upper reaches of the Yangtze River, as well as the middle and upper reaches of the Hanjiang River and Danjiangkou Reservoir.
In addition, it is also necessary to focus on the high meteorological risks of mountain torrents and geological disasters in northeastern Sichuan, northern and southern Shaanxi, southwestern Shanxi, and western Henan.
It is recommended that the public pay attention to the latest weather forecast and warning information in a timely manner and avoid going to areas with high disaster risk.
In mountainous and valley areas, we should focus on the impact of heavy rainfall on areas with fragile geological conditions and changes in the water level of small and medium-sized rivers.
Urban residents beware of the impact of urban waterlogging and road culvert water that may be induced by heavy rainfall on traffic safety, urban operation and other disaster chains.
Reporter: What are the hazards to crops caused by continuous rainfall? How to deal with it?
Expert: The
Sichuan Basin and the Huanghuai area continue to have heavy rainfall and rainy days, the soil is too wet, and some low-lying farmland has accumulated water or waterlogging, which is not good for the full filling of autumn crops such as summer corn and summer soybeans, the cracking of cotton bolls, and crop harvesting and drying. .
It is recommended to drain waterlogging and waterlogging in time, improve the field environment, and promote the normal filling and maturity of summer corn and other crops; the Sichuan Basin uses the precipitation gap to grab mature crops, and do a good job in ventilation, drying, and storage.