What are the causes of summer floods in the North China Plain, and what are the causes of spring dro

North China Plain. The southern region (36—.) E, the same below) flat terrain, abundant heat, sufficient sunlight, fertile soil, is China's grain cotton, especially cotton production area. But the amount of precipitation.

The inter-annual variation is very large, and the drought and flood disasters are frequent, affecting agricultural production. In recent years, many studies have shown that [Hz,S] caused a wide range of drought and flood disasters due to abnormal sea water temperature, which caused abnormal atmospheric circulation. This paper mainly analyzes the characteristics of summer drought and flood and precipitation in the southern part of the North China Plain in the history of El Niño years, and obtains the basis for predicting summer drought and flood in the southern North China Plain in the current and next year of El Niño years.

The southern part of the North China Plain is represented by the data of Dezhou, Liaocheng, Binzhou and Jinan. 1 Characteristics of summer drought and flood and precipitation in the southern part of the North China PlainAccording to the statistics of drought and flood data in North China in the past 500 years, the 137 years from 1854 to 1990 belonged to the 15-year period of grade 1 (waterlogging), 41 years of grade 2 (partial waterlogging), 33 years of grade 3 (normal), 29 years of grade 4 (partial drought), and 19 years of 5 (drought). The number and percentage of its occurrence at all levels.

See Table 1. Table 1 Frequency of drought and flood in northern Shandong from 1854 to 1990.

and percentages at all levels - 12 - statistics of drought and flood in the summer (June to August) since meteorological records (1951-1990 40 years). The average precipitation in summer (June to August) was 410 mm, and the severe waterlogging in this area was mainly discussed in months based on the precipitation data of 13 stations in the North China Plain from June to August 1991 and 1995. The area with the most frequent occurrence of extreme drought and flood is in Yanshan.

The southern foot and the eastern foot of Taihang Mountain. There were many rains and floods in the 50s, drought in the 60s and 80s, and increased rains and floods in the 90s, reflecting the phased changes of drought and flood in the North China Plain. Eastern Siberia (or Sea of Okhotsk.

The blocking high and the stable distribution of the eastern, high, and westward lows in the middle and high latitudes of Asia play an important role in the formation of severe drought and rainfall in the North China Plain, respectively.

The North China Plain is in the temperate monsoon zone, and in summer, it is affected by the southeast monsoon from the ocean, and the precipitation is abundant and concentrated.

(1) The spring frontal rain band did not move to the North China Plain, where there was less precipitation and few surface rivers.

2) lack of snow cover in winter and no snow melt in spring;

3) The temperature rises quickly in spring and evaporates vigorously;

4) Overwintering crops grow back to green and require a large amount of water;

Summary. In the 2023 flood season, drought and flood will alternate, waterlogging will be heavier than drought, and heavy rains and floods will be heavier than usual.

Hello, for your question, my answer is: waterlogging.

In the 2023 flood season, drought and flood will alternate, waterlogging will be heavier than drought, and heavy rains and floods will be heavier than usual.

Whether 2023 is a flooded year or a dry year This statement is based on the precipitation situation in various places, but it cannot be generalized as a waterlogging year or a dry year, because in some areas, it is rainy in the summer and winter season, and the precipitation in some places is concentrated in early spring.