Integrated rehabilitation management by prioritization of rehabilitation areas for small and medium sized municipalities

摘要

The lifespan of urban water networks (e.g. water supply and sewer) and other infrastructure systems (gas distribution, streets, etc.) is limited. While for networks in larger municipalities (＞50,000 inhabitants) various rehabilitation models exist, rehabilitation management of networks in small municipalities (water supply, sewer, gas supply, etc.) usually depends mainly on expert knowledge and the experience of engineers, as models and reliable data for these networks are often missing. To analyze this problem, we investigated the integrated rehabilitation of infrastructure networks of a small municipality (13,100 inhabitants). Since, water supply, sewer and gas distribution network and condition/failure data were available, an integrated, multi-utility approach is enabled. For rehabilitation management a prioritization of street sections containing all available infrastructure was applied. Jointly with the priority of each network an overall priority of the areas is estimated for an integrated rehabilitation management.