Environmental Engineering Reference
In-Depth Information
CHAPTER 9
Decision Support Tool
for Design and Reliability Assessment
of Water Distribution Networks
This chapter describes the decision support tool for ne twork d esign and r eliability a ssessment
(NEDRA), compiled from the software applications specifically developed for the research
presented in Chapters 5 to 8. The reliability analyses that have been conducted on geometric-,
hydraulic- and economic grounds all reflect the complexity of network resilience that is still
difficult to generalise or classify, as well as it is impossible to asses without full integration of
all three aspects. It has been therefore appropriate to conclude the research on pattern
recognition for network reliability assessment by a piece of software that should be able to
generate sufficient number of design scenarios, assess them in various aspects and let the user
eventually draw his/her own conclusions about the best alternative, also from the reliability
perspective. NEDRA is composed of the modules for network generation, filtering,
initialisation, optimisation on the least-cost diameter, diagnostics of network geometric-,
hydraulic-, and economic parameters and finally the assessment of network resilience.
Computations can be done for single network in one or multiple scenarios, or a sequence of
networks of virtually unlimited size and number, mutually similar or different in properties.
The programme has been illustrated on a design example of 50-node network.
 
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