Soil erosion is caused by the combination of unfavorable natural conditions and unreasonable economic activities of human beings. The unfavorable natural conditions are: the ground slope is large, the soil is soft and easy to corrode, the rainstorm intensity is high, and the ground is not covered with vegetation; Unreasonable human economic activities, such as deforestation, steep slope reclamation, grassland overgrazing, mining, road construction and other production and construction, do not recover in time after destroying surface vegetation, and dump soil and stones at will. Soil erosion has caused great harm to the ecological environment, production, life and economic development of local and downstream rivers. Soil erosion destroys the integrity of the ground, reduces the soil fertility, causes the land to be hard, petrified and desertification, affects agricultural production, threatens the safety of cities and towns, aggravates the occurrence and development of natural disasters such as drought, leads to people's poverty and deterioration of production conditions, and hinders the sustainable development of economy and society.
Soil erosion is caused by the serious destruction of vegetation in humid or semi-humid areas. If vegetation is destroyed in arid areas, it will lead to sandstorms or land desertification, not soil erosion.
Due to the serious destruction of vegetation, combined with the erosion of rain and surface water, soil erosion is caused.
Increasing vegetation coverage can preserve soil and water, that is, prevent soil erosion.