针对已有的城市洪灾风险评价模型存在的不足,构建了基于熵-云模型的城市洪灾风险评价模型,首先引入云模型理论,依据指标体系既定的等级评价标准,由双边约束公式确定相应于城市洪灾风险等级的云模型参数;然后引入混合熵权概念,综合运用熵(Shannon)和层次分析法(AHP)确定各指标的权重;最后代入实测资料,计算各指标实测数据属于各风险等级的隶属度,并依据最大隶属度原则,直观有效地确定风险评价结果。实例应用结果表明,该模型评价结果与真实情况相符,可见该模型可行、有效。 According to the existing problems of urban flood risk evaluation model, this paper builds an urban flood risk evaluation model based on entropy-cloud model. Firstly, the cloud model theory is introduced. According to the established rating system of the index system, Flood risk level cloud model parameters; then introduce the concept of hybrid entropy weight, the use of Shannon and AHP to determine the weight of each indicator; finally into the measured data to calculate the measured data of each index belongs to the risk level Degree, and according to the principle of the maximum degree of membership, the result of risk assessment can be determined visually and effectively. The results of application show that the model evaluation results are in accordance with the real situation, which shows that the model is feasible and effective.