Evaluation of the state and operational effectiveness of urban drainage pipe network based on AHP-fuzzy comprehensive evaluation method: taking Huai'an District of Huai'an City as an example

Grasping the construction status and operating status of the drainage pipe network is conducive to making targeted decisions on the maintenance and repair of the drainage pipe network. An evaluation index system for the status and operation efficiency of urban drainage pipe network including 14 indexes was established based on service performance, construction status, and maintenance management, and combined with Analytic Hierarchy Process (AHP)-fuzzy comprehensive evaluation method, the status and operation efficiency of the pipe network in Huai'an District, Huai'an City were comprehensively evaluated. The results showed that the main factors affecting the status and operating efficiency of the drainage pipeline network in Huai'an were the centralized collection rate of domestic sewage, the rain and sewage diversion ratio, the sewage treatment rate and the maintenance level of the pipeline network. The sum of the weights of the 4 indicators was greater than the sum of the weights of the other 10 indicators. The comprehensive evaluation level of the drainage pipe network in Huai'an District was above the medium level, among which the service performance and maintenance management of the drainage pipe network were above the medium level and the construction status was below the medium level. Based on the results of the general survey of the pipeline network in Huai'an District, it was proposed that the management of pipeline network diseases and pipeline defects should be the focus of pipeline network maintenance work in the future.