ABSTRACTThe difficulty and complexity in evaluating water resource problems is becoming more evident to management with each passing year. Decisions are required sooner, in more detail, with some background—and yet cost more to evolve. One potential method to arrive at solutions at least more rapidly and in more detail is via simu‐ lation. A manager may evaluate many alternative solutions to his problem—provided an evaluated simulation system is at his disposal.One such system under development is a highly flexible computerized model system for evaluating real economic/technical applicability of desalting to a selected area. The Economic Evaluation Model System (EEMS) was initially conceived during 1968 and the first version was completed in 1969.This system represents the combination of technical, environmental and economic functions into an interrelated system, which allows the user to examine a broad range of water related problems—oriented toward the applicability of desalting as an additional or alternative source of water.The major thrust of the development of the system thus far, however, has been with the methodology involved and further refinements and extensions of the system are recognized and planned for in future research and deve
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