SEWER INFRASTRUCTURE MANAGEMENT: THE CITY OF EDMONTON EXPERIENCE

摘要

Modern infrastructure systems are highly developed with considerable capital fundingrninvested in them. While capital is spent on new infrastructure initiatives, the maintenance of thernpresent infrastructure must not be neglected. Increasingly, public agencies are being urged torndevelop improved systematic methodology for allotting their period budgets more appropriatelyrnso that the capacity of the installed infrastructure is more fully utilized and sustained. Whenrnplanning the allocation of investment funds, multiple objectives may exist which are dependentrnon the constraints, resources available for construction, and the interrelationships andrndependencies among all of the alternatives. This makes the task of planning, prioritizing, andrnallocating funds a complex exercise. This paper presents a financial outlay model called PRISM,rnProactive Rehabilitative Sewer Infrastructure Management, which uses linear programming tornoptimize allocation of funding for the local sewer network maintained by the City of Edmonton,rnCanada. By grouping sewer pipes into categories based on parameters of age, diameter, materialrntype, waste types, and average depth of cover, the model provides a mechanism for determiningrnthe most appropriate allocation or appropriation of funding given a planning horizon andrnbudgetary constraints.