Flood danger

Flood is a natural hydrological phenomenon, and it is called water disaster only when it threatens human safety, affects social and economic activities and causes losses. The floods in China are very frequent. Since the founding of People's Republic of China (PRC), the main floods in China are as follows. 195 1 year: Liaohe flood. There are 434,000 square meters of flooded farmland in Liaoning and Jilin provinces, with 876,000 people affected and more than 31000 people killed. 1954: the Yangtze River and Huaihe River floods. The flooded farmland in the middle and lower reaches of the Yangtze River is 3 1.7 million hm2, with a population of 1.88 million, and more than 30,000 people died. There are 4.082 million hectares of cultivated land in Huaihe River Basin. 1858: The Yellow River overflowed. The biggest flood occurred in Huayuankou Station of the Yellow River since the measured data, and the beach area and Dongping Lake were flooded. 1963: Haihe River flood. A catastrophic flood occurred in the south of Haihe River, which flooded 4.4 million hectares of farmland and interrupted the Beijing-Guangzhou railway. 1975: Huaihe River is in the water. At the beginning of August, a rare rainstorm occurred in the upper reaches of Huaihe River. The rainfall in Zhuanglin, Biyang County, Henan Province reached 1605.3mm in three days, and two large reservoirs in the center of the rainstorm burst. There are 8.2 million people in Henan province, and 6.5438+0.06 million square meters of cultivated land suffered from severe floods, with 5.6 million houses collapsed and 26,000 people died. 198 1 year: the upper reaches of the Yangtze River were flooded. Sichuan province 138 counties and cities were affected. 1982: Yellow River flood. 199 1 year: Huaihe River and Taihu Lake are flooded. The Huaihe River is flooded with 40 1 10,000 hm2 of cultivated land, 54.23 million people affected by the disaster, and10.96 million houses collapsed. 1994: Xijiang flood. 1995: The Yangtze River, Liaohe River and Songhua River are flooded. The farmland in Jiangchuan, Hunan, Hubei and Jiangxi provinces was flooded by 32 1.4 million square meters, with a population of 85.26 million. The farmland in Liaoning, Jilin and Heilongjiang provinces in Northeast China was flooded by 2.232 million hm2, and the affected population was 6.5438+0.0786 million. 1996: floods in Pearl River, Yangtze River and Haihe River. In that year, all provinces (autonomous regions and municipalities directly under the Central Government) suffered from floods in different degrees, and more than half of the provinces (autonomous regions) were seriously affected. There are 3 1 1 cities above the county level, the affected area is11823,300 hm2, the affected population is 267 million, and the direct economic loss is 220.836 billion yuan. 1998: The Yangtze River, Nenjiang River, Songhua River, Pearl River and Minjiang River are flooded.