WWRC 89-34
Bi-Objective Analysis of Waste Load Allocation Using Fuzzy Linear Programming
Abstract
Because of its complexity from both a legal and economic standpoint, the problem of optimal
waste load allocation is multiobjective by nature and should be treated accordingly. To perform this
task, an optimization technique known as fuzzy programming is utilized in solving a
multiple-discharge, two-objective waste load allocation problem. The two objectives considered are: (1)
the maximization of waste discharge and (2) the minimization of the largest difference in equity measure
between the various dischargers. Results from this study reveal that fuzzy linear programming is a
valuable tool for solving the multiple-objective water quality management problems. Moreover, it is
shown that the selection of a linear or logistic membership function in providing preference criteria
between the two objects, has no effect on the 'best compromising solution'.
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