Hazards caused by landslides and mudslides: Landslides will bury farmland, buildings and roads on and under hillsides, causing casualties. Debris flows out hundreds of thousands or even millions of cubic meters in a very short time, blocking rivers, destroying towns and villages, destroying forests, farmland and roads, and doing great harm to people's lives and property, production activities and the environment.
Examples of landslides and mudslides: The mountainous area of China accounts for 2/3 of the total land area. The ups and downs of the earth's surface have increased gravity, and the unreasonable economic activities of human beings have expanded, which has seriously damaged the surface structure, made landslides and mudslides widely distributed natural disasters, and caused great harm to people's lives and property, production activities and the environment.
Yunnan is one of the provinces with the most serious landslides in China. 1986 The Dalishu landslide of Dongchuan branch line stopped the railway for 90 days, resulting in a loss of100000 yuan. 1987, the Changping landslide in Ninglang County, near the Jinsha River, turned the color of the Jinsha River into black and polluted the water quality to Dukou City, with a flow of more than 300 kilometers. Due to the threat of landslide, the county system in Bijiang County was cancelled, and the relocation cost alone reached 8,000 yuan11,992 yuan. A village in northern Fujian was looted by a mudslide. After the disaster, county, town and village Qi Xin helped themselves. 1.7 million yuan of disaster relief funds were put in place in time, and 80,000 yuan of village finance was invested in time. The victims have rebuilt their homes and resumed production. Debris flow filled 500,000 cubic meters of reservoir, raised the riverbed by four or five meters, diverted the river, and greatly weakened the drought resistance.
The total grain output here has dropped sharply from 6.5438+0.2 million kilograms to more than 70 kilograms now.