Risk Assessment of Flood Hazard in Beijiang River Basin Based on BP Neural Network

According to disaster system theory,this paper establishes the risk evaluation index system of flood disaster in Beijiang River basin by using GIS technology and constructs the assessment model based on BP neural network to evaluate the flood risk in Beijiang River basin.Compared with a few historical floods,the result shows that the assessment model is reasonable and can better reflect the actual situation of flood risk and provide the flood risk assessment graph.