Methodologies for Reliability Analysis of Water Distribution Systems

There have been no universally accepted methodologies or even definitions developed for the reliability of water distribution systems. Only recently have there been any major attempts to develop various methodologies for the assessment of reliability of these systems. This paper presents the background for new methodologies for water distribution system reliability, reliability analysis of pumping system, and reliability — based optimization models for water distribution systems. The methodology from water distribution system reliability computes model and system reliabilities using Monte Carlo simulation. The methodology for the reliability analysis of pumping systems is based upon a frequency and duration analysis procedure that can consider both mechanical failures and hydraulic failures. An optimization methodology for the reliability — based design of water distribution networks is presented that interfaces a nonlinear programming optimizer, with a hydraulic simulator and a reliability model.

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