Fuzzy logic modeling & Geography Information System

The fuzzy logic is a new technique which refers to professional knowledge instead of complex mathematical modelling for progressive systems. In this work the fuzzy logic performance investigated due to high speed data intercommunication for urban water distribution system. Therefore present work analytically concentrated on decreasing rate for Minimum Night Flow “MNF” of Rasht city water distribution network by evaluate of the two variances of water transmission system. These variances were analysed by the WATERGEMS8.2 software as a subprogram of ArcGIS9-ArcMap9.3. The results showed that the 200 lit / secdecreasing of Minimum Night Flow for variant of water transmission from 50000 m3 Saravan water reservoir to 40000 m3 water reservoirs at east and west side in Rasht city.