Abstract
The objective of water supply is to serve the pure, rich and cheap water. But the development of urban and the industrial activity cause the water resource problems, One of approaches to solve these problems is the dual water supply system. This system is studied from technical and economical aspects, but it is only a few study of user's, namely, citizen's evaluation for it In this work, user's evaluation structure for water supply system is explored and the possibility to set up the dual water supply system against water resource problems is assessed by the Fuzzy Multi-Attributes Utility Function method, This method is that general. Multi-Attributes Utility Theory is extended by introducing the fuzzy sets theory, especially the concepts of fuzzy number and fuzzy function, which can treat the human subjectibity. We show that, due to the questionnaire results and using these the calculated total utility of fuzzy utility function, it is sufficiently possible to set up the dual water supply system.
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