Title page for ETD etd-10062009-020212

Type of Document Master's Thesis
Author Greene, James J.
URN etd-10062009-020212
Title Global optimization of water distribution systems
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Loganathan, G. V. Committee Chair
Diplas, Panayiotis Committee Member
Trani, Antonio A. Committee Member
  • Mathematical optimization
Date of Defense 1992-05-15
Availability restricted

A holistic procedure GLOBAL for the global optimization of water distribution systems is presented. The procedure identifies an optimal tree layout for the network and augments it with loop forming links to assure reliability. Thus, the chosen optimal layout in judiciously subjected to various flow configurations to find an optimal flow division among pipes for the least cost diameter selection. Because the problem is nonconvex, two global search schemes, MULITIST ART and ANNEALING, both within the framework of procedure GLOBAL, are employed to permit a local optimum seeking method to migrate among various local minima. A modified Linear Programming Gradient (LPG) procedure is judiciously employed as local optimizer. An example problem from the literature is solved using the proposed procedure. The optimal solution has a cost very near to the theoretical limit for this problem and is significantly smaller than the ones reported by other researchers.

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