Drought usually refers to the climate phenomenon that there is no or little rain for a long time, and the water is not enough to meet human survival and economic development. Drought has always been a major natural disaster facing mankind. Even today, with the development of science and technology, its disastrous consequences are still everywhere. In particular, with the economic development and population expansion of mankind, the shortage of water resources has become increasingly serious, which has directly led to the expansion of arid areas and the aggravation of the degree of drought. The trend of drought has become a global concern.
[Encyclopedia: Meteorological drought Agricultural drought Classification of drought Drought prevention and drought resistance 】
[Event: High temperature and drought in Sichuan and Chongqing in 2006 Rare continuous drought in autumn and winter in northern winter wheat region 】
