1963 when was the flood in Yixian county, Hebei province? What is the specific time and date?

1In the first ten days of August, 963, a rare torrential rain occurred in Haihe River Basin. Rainfall began at 5438+0 in June and ended at 5438+00 in June, mainly on February 8. Now briefly described as follows:

On August 1 day, there was moderate rain in Henan and southwest Hebei in the upper reaches of Weihe River, with the rainfall of 20 ~ 40 mm. On the 2nd, a local rainstorm with a drop of 100 mm or more occurred in the upper reaches of Weihe River, Fuyang River and Yehe River. The rainy area on the 3rd was mainly in the upper reaches of Fuyang River and Zhangwei River, with the center of Handan being 466.5mm, covering an area of 23,800km2 over100mm. On the 4th, the intensity of rainstorm moved northward, and the rain areas were mainly the upper reaches of Fuyang River and Yehe River. The daily rainfall of the rainstorm center reached 865 mm, the area above 100 mm was 32,700 square kilometers, and the area above 200 mm was 1 1200 square kilometers ... On the 5th, the intensity of the center moving northward weakened, and the daily rainfall of the center Zanhuang Huangbeiping was 500 mm.. On the 6th, the rainstorm continued northward, and its intensity weakened. The daily rainfall in the center is 290 mm, and on the 7th, the rainy area continued to move northward, with the daily rainfall in Wanxian Sixiang Center being 704 mm.. On the 8th, the rainstorm center moved to Laiguangying, Beijing with a daily rainfall of 464 mm.. On the 9th, the daily rainfall of Jinghai in the rainstorm center was 235mm. From August 2 to 8, the rainfall distribution in the seven days is as follows: the rainfall in the eastern plain is generally around 200 mm; The leeward area of coastal areas and the west side of Taihang Mountain is less than 100mm, and the rainstorm center is mainly concentrated in the windward area of the east side of Taihang Mountain. The rain belt exceeding 500 mm is 480 kilometers long from north to south, 0/20 kilometers wide from east to west, and covers an area of 43,800 square kilometers. One rainstorm center is the upper reaches of Fuyang River, with a rainfall of 2050 mm on the 7th, and the other center is Yixian County, Daqing River.

The characteristics of June 38 rainstorm are: the rain area is stable and lasts for a long time; Extremely strong; Heavy rain covers a wide range.

2. Brief introduction of flood

The 6.38 flood is characterized by a large amount of flood and fierce force. More than 300 small and medium-sized reservoirs were washed away, and large reservoirs overflowed one after another. Now briefly described as follows:

① Zhangweinan Canal: the flood peak flow of Zhanghe Guantai on August 6th was 5470 cubic meters per second, the flood peak flow of Zhangwei River confluence said that Gouwan on August 6th was +0 1 day was 3240 cubic meters per second, and the flood peak flow on Linqing day was 2540 cubic meters per second.

② Ziya River: flood peak flow of Minghe River 1.23 million m3/s, flood peak flow of Zhuzhuang in Shahe River, flood peak flow of Macun in Huaihe River, flood peak flow of Dongwushi River on August 6th, 2030 m3/s, flood peak flow of Lincheng River on August 4th, and flood peak flow of Gangnan in Hutuo River, 4360m3.

③ Daqing River: On August 7th, the maximum storage capacity of Wangkuai, Koukou and Hengshanling were 9520, 468 and 2670 cubic meters per second respectively. On August 8th, the maximum storage capacity of Waterfall River, Angezhuang, Longmen and Xiyang were 1900, 6320, 4250, 77 10 cubic meters per second, respectively. On August 9th, the flood peak of Guocun Village in Zhulong River in the south branch was 5,380 cubic meters per second, and the downstream Zuo Di was flooded. On August 8th, Zijingguan and Zhang Fang Hongfeng of Juma River in the north branch were 4,490 m3/s and 9,920 m3/s respectively; The flood peak of the north branch of Juma River in the south is 4,770 m3/s on August 8th, 2,790 m3/s in the east village of Baigou River on September 9th, 3,540 m3/s in Baigou Station, and the maximum flood diversion of new buildings is 3 140 m3/s, and Baiyangdian Lake is August 14 10.

There was no major flood in the northern system on June 38, which was beneficial to the flood control in the southern system. The total amount of this flood is 27.01600 million cubic meters, of which Ziya accounts for 50.7%, Daqing accounts for 29.9% and Nanyun accounts for 65.438+09.4%.

3. The corresponding weather system

1963 At the beginning of August, a deep and stable trough of low pressure was formed over North China. This stable circulation situation makes the Haihe River basin in the intersection of cold and warm air currents for a long time, and the continuous northward weather system has caused continuous heavy rain. On August 2, the east-west shear line changed from a trough of low pressure to a trough of low pressure, causing a rainstorm in the south of the Yangtze River, and the southern part of Haihe River basin was affected by its edge. On the 3rd, the vortex near Guiyang moved northward, affecting the rainstorm in the south of Haihe River. On the 4th, another trough of low pressure entered Hebei, causing a torrential rain. On the 7th, another trough of low pressure moved eastward and merged with the shear line in western Hebei to form a vortex. At the same time, the center of Typhoon No.8 moved to the northwest, which led to an increase in wind power along the eastern coast.