What are the disasters in civil engineering

1, earthquake China is mostly within 30 kilometers of shallow earthquake, 6 degrees of defense city more than 80%. History of death more than 20,000 people died in more than a dozen earthquakes, China accounted for four times, including January 23, 1556 in Shaanxi Huaxian, Tongguan earthquake death toll of 830,000 people.

2, landslides, mudslides landslides and mudslides are a kind of secondary disasters caused by meteorological disasters. These disasters are widely distributed, destructive, hidden and easily chained into disasters, etc., not only will block the river and transportation, destruction of farmland and buildings, but also cause casualties and property damage, causing great damage to the ecological environment.

3, flooding Henan in August 1975 due to the northward movement of the typhoon, a large area of cumulonimbus clouds in the cold and precipitation, continuous heavy rainfall for three days and nights. Total precipitation reached 1,605mm, a number of reservoirs failed, many dykes were forced to blow mouth flood. 1.13 million square kilometers of farmland in 29 counties were flooded, 11 million people were affected, 90,000 people died, and the damage exceeded 10 billion yuan.

4, desertification of the world's annual desertification area of 60,000 square kilometers, by the desert erosion of the area of 210,000 square kilometers. 2000 March 22-30, a sweeping north China, extending to Nanjing, Shanghai, the dust storm from the Alxa Desert in the western part of Inner Mongolia, a wide range of sand, dust, and mud and rain spread to the Beijing, Tianjin, Hebei, Shaan, etc., the car and the road was muddy rain polluted with stains, stains, and so on. unappealing.

5, nuclear leakage April 26, 1986, 1:24 local time, the Soviet Union's Ukraine **** and the country of Chernobyl nuclear power plant suffered a serious leakage and explosion. The accident resulted in 31 instant deaths, tens of thousands of people were fatally or seriously ill due to the far-reaching effects of the radioactive material, and there are still births of deformed fetuses caused by the effects of radiation.