Conclusions
(1) In dealing with a complex multi-indicator evaluation system, the utilization of the AHP-DEMATEL combined weighting method proved more adept at capturing the
interrelationships among these indicators. This resulted in a more objective and rational distribution of weights.
(2) The identification of two categories of imbalanced pipelines and streets facilitated the precise delineation of areas with urgent sewage pipe maintenance requirements. Furthermore, it accounted for situations where financial resources were limited, and certain areas were not immediately considered. This approach allowed for a more accurate and comprehensive determination of maintenance prioritization and resource allocation, thereby optimizing the utilization of existing resources.