Flood Risk Assessment Based on the Information Diffusion Method

According to the fact that the traditional mathematical statistical model can hardly analyze flood risk issues when the sample size is small, this paper puts forward a model based on information diffusion method. Taking Henan province for example, the risks of different flood grades are obtained. Results show that by using this risk analysis method we can avoid the problem of inaccuracy faults by small sample size, the estimations obtained by this risk method conform with the actual disasters and the method is satisfactory.