National Research Council of Canada. NRC Institute for Research in Construction
The 11th International Conference on Computing and Control for the Water Industry, CCWI 2011, September 5-7, 2011, Exeter, UK
long term planning; short term planning; water main renewal; hydraulic capacity; genetic algorithm; economies of scale; adjacent infrastructure
Efficient renewal planning of water mains requires the consideration of the long term deterioration of their structural resiliency, their deteriorating hydraulic capacity and their life-cycle costs. Cost of pipe replacement can be significantly affected by economies of scale and by coordinating pipe replacement with adjacent infrastructure work such as roads, sewers, etc. The simultaneous consideration of all these factors at a single pipe planning resolution is computationally prohibitive due to vast dimensionality. In this paper we present a comprehensive approach that considers these factors in two stages. In the first stage, the long-term deterioration of both the structural resiliency and hydraulic capacity of water mains are explored, along with the consequences of failure and renewal cost, to produce a list of candidate pipes to be considered for renewal in the short-term. In the second stage, these candidate pipes are examined in more detail, including economies of scale and adjacent infrastructure consideration, to produce the best candidates for immediate and near-term action.
Urban Water Management: Challenges and Opportunities.