Equivalent Pipe Methods for Optimizing Water Networks—Facts and Fallacies

by P. K. Swamee, Lect. in Civ. Engrg.; Univ. of Roorkee, Roorkee, India,
P. Khanna, Reader in Civ. Engrg.; Univ of Roorkee, Roorkee, India,

Serial Information: Journal of the Environmental Engineering Division, 1974, Vol. 100, Issue 1, Pg. 93-99

Document Type: Journal Paper


A simple water supply loop has been optimized by Lagrange multiplier method. The equivalent length and equivalent diameter approaches for optimizing the same loop have been examined and inherent fallacies considered. The mathematical logic supporting these methods has been shown to be unsound.

Subject Headings: Optimization models | Water pipelines | Water supply | Lagrangian functions | Professional societies

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