The holistic prioritisation of proactive sewermaintenance

摘要

In sewerage asset management, there has been a concerted move away from primarily assessingnsystem capacity or physical performance, to focus on “serviceability” as a key performancenindicator. After identifying flooding due to blockages as a key failure mode, this paper documentsnthe development of a tool which can contribute towards efficient sewerage asset managementnwithin the context of maintaining “serviceability” to customers, the public and the environment.nAgainst the background of poor availability of reliable data, the reported project provides anprocess based on FMECA which can be implemented with limited information and without thenneed for additional data gathering. Land use and network characteristics data have been usednalongside a hydrodynamic model to determine critical points in a network. Based on this, anmethodology for identifying where blockage likelihood lies is outlined alongside annapproach which allows failure consequence to be quantified. The text then outlines anframework which allows failure likelihood and consequence to be combined to prioritisensewerage asset maintenance.