Flooding is one of the worst natural disaster in China, and it is characterized by wide distribution, high frequency, and huge economic losses, which has been one of the important factors that restrict the economic and social sustainable development. Research shows that flooding in China has significant periodic decadal characteristics of high frequency and low frequency. For nearly 30 years, the inter-annual amplitude of floods in eastern monsoon climate area in China mostly showed a trend of increase. The increased frequency and intensity of flooding in typical southern river basins with high flood risk, and small and medium-sized rivers became prominent, and urban flooding and water-logging caused by storms in metropolises showed an increased trend. Under the background
of global climate warming, rapid development of urbanization, heavy rain, floods and other extreme events may increase in occurrence and in intensity in future in parts of China, so as to increase the risk of flood disasters and accelerate the difficulty of flood-prevention and dispatch command, and thus causing unfavorable influences on the economic and social sustainable development.