Risk Assessment Method of Drainage Network Operation Based on Fuzzy Comprehensive Evaluation Combined with Analytic Network Process

Drainage networks are generally repaired after a failure occurs, and there is a lack of risk prevention and evaluation. To provide an effective evaluation method for the safe operation of drainage pipe networks, particularly in terms of pipeline failure and the severity of issues, this study classifies the adverse factors of safe operation and establishes an index evaluation system to determine the probability of pipeline failure. The system considers human, management, pipeline attribute, and environmental factors and is suitable for buried drainage pipelines. According to the index evaluation system, the analytic network process (ANP) method is used to consider the coupling relationship between various factors and obtain the weight of each factor. A fuzzy comprehensive evaluation is performed to obtain the final evaluation results. Finally, the established method is implemented on the drainage network of Suzhou Industrial Park, China. The results show that the evaluation results of this method are consistent with the daily cognition and field detection results. In addition, the index system established in this study can provide a reference for the establishment of accident databases and management of drainage networks.