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UBC Theses and Dissertations

Optimization of pipe sizes in open-ended sprinkler irrigation systems Burkholder, David R.

Abstract

A sprinkler irrigation system is typically designed by first choosing the set of operating conditions and the location for the pipe network, and then selecting the optimal pipe sizes for the network so that the system cost is minimized. An efficient optimizing technique would greatly improve this design process. This thesis examines a number of procedures for optimizing pipe sizes in open-ended (tree-like) sprinkler irrigation systems. The Linear Programming Technique was found to be by far the most suitable procedure for solving complex pipe sizing problems. A computer model utilizing a general linear programming routine is presented for optimizing pipe sizes in gravity systems, and pumping systems with both constant-speed and variable-speed power units. A comprehensive discussion is included, describing all input parameters, and the function and operation of each major segment of the model. An example is used to reinforce ideas formulated in the discussion and to illustrate how the model can be implemented. A complete listing of the model, and a copy of both the input data and the output, for the example, are given in the indices.

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