Planning renewal of water mains while considering deterioration, economies of scale and adjacent infrastructure

摘要

The structural deterioration of water mains and their subsequent failure are affected by manynfactors, both static (e.g., pipe material, pipe size, age (vintage), soil type) and dynamic (e.g.,nclimate, cathodic protection, pressure zone changes). This paper describes a non-homogeneousnPoisson model developed for the analysis and forecast of breakage patterns in individual waternmains, while considering both static and dynamic factors. Subsequently, these forecastednbreakage patterns are used to schedule the renewal of water mains in an economically efficientnmanner, while considering the various associated costs, including economies of scale andnscheduled works on adjacent infrastructure. In this paper, he principles of the approach arendescribed briefly and its application is demonstrated with the help of a case study.