Flood is a disaster caused by the surge of water levels in rivers, lakes and reservoirs, the overflow or breach of dams and the inflow of water. Flood not only caused great disasters to agriculture, but also caused losses to industry and even life and property. It is one of the top ten natural disasters that threaten human survival. Flood disaster is a natural disaster with high frequency and the most serious impact on the national economy in China.

According to statistics, in the 1990s, the direct economic losses caused by floods in China were about 654.38+0.2 trillion yuan, and only 654.38+0.998 was as high as 260 billion yuan.

According to the website of the Office of the State Flood Control and Drought Relief Headquarters, as of June 8, 20 16, 5 provinces (autonomous regions and municipalities) have suffered floods this year, with 9,553,900 people affected and 83 people killed.