Modelling Reliability Based Optimization Design ...


There is a growing concern on the capacity of water utilities via governmental regulatory agencies regarding potential optimization and reliability for water distribution network. Generally, water distribution networks comprise about 60% of the total budget for a complete framework of a water supply system. According to this fact, achieving an optimum solution for water distribution networks as models’ outcome of reliability-based optimization design has become the great concern to save considerable amount of allocated budget. During the last decade, many authors were interested in studying optimization and reliability for water distribution networks that include solving non-linear hard problem of the network hydraulic equations. The optimization and reliability models of water distribution networks have number of varieties in studying aspects that include efficiency, accuracy, different sizes/scales of networks, and the consumed run time to define the optimum solution. During the current decade, considerable amount of attention has been given to reliability of water distribution networks in conjunction with the optimization to achieve maximum benefits with the minimum cost. This concern has been extended to cover the risk management for water distribution networks as a way to embark on facing the shortage of water resources all over the world or improving asset management programs. The main objective of this chapter is to develop standalone model divided into four sub-models using MATLAB environment programming language. The developed model and its corresponding sub-models would acquaint an optimum solution for a given water distribution network that achieve both least cost design and reliability based optimization design in the meantime. The main model is called RELOPT and can be used as a tool to implement modelling reliability-based optimization design, deterioration analysis of water pipe networks, risk analysis and assessment, and decision support system. RELOPT is integrated with four sub-models those are: optimization search engine model that is based on a new technique driven from Genetic Algorithms approach is called Linear Adaptive Genetic Algorithm (LAGA); pre-estimation optimization model that is based on Average Gradient Method (AGM) to accelerate the process of the optimization search engine; reliability model that is based on load resistance concept for calculating system reliability. Through this chapter the number of subjects will be discussed those are: background of water distribution systems, definition of problem in statement, main objectives, history of optimization and techniques, history of reliability and techniques, proposed optimization technique, the advantage of the new optimization technique, proposed reliability evaluation technique, proposed risk assessment technique, resultant decision support system, applications of the proposed model using existing cases studies, and conclusion including outcomes and recommendations. Developing the main model and it’s sub-models in using MATLAB power with some snapshots will be discussed.

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Last updated June 16, 2016
Created June 16, 2016
Format unknown
License No License Provided
created over 2 years ago
id d0a37a36-7d19-4fb9-ae0e-7f6a51e07e8d
openAccess false
package id b0b32b0f-aa1a-43fe-9de8-0d6fcc872fb8
position 8
revision id f0a5a351-7af0-466a-aa97-47988e9757d6
state active
tags Water Distribution Networks,Average Gradient Model,hydraulic solver,optimization model,Linear Adaptive Genetic Algorithm
topic Water supply and distribution
type Book chapter
year 2,011