Performance Modeling Of Wastewater Collection Networks Using Multi-Proactive Renewal Analysis

Traditionally, highly deteriorated wastewater pipes are given priority in capital work activities. To this end, when capital budgets are limited, money is first allocated to replacing sewers in WRC Internal Condition Grade 5 (ICG 5), the worst condition based on WRc coding system, and the remaining budget is then used for the next condition groups such as ICG 4.This study investigates the effect of partial allocation of capital budgets between fully-deteriorated (ICG 5) and semi-deteriorated (ICG 4) sewers, using a system dynamic modeling approach over the design life of the asset. The results of analyzing a Canadian wastewater collection network show that a multi-proactive rehabilitation strategy can be more effective in the long-term financial planning of wastewater collection networks. Municipalities and utilities can use the decision-support tool provided herein as an effective asset management plan for wastewater collection networks.