Landfill sites site selection using fuzzy logic in GIS and Fuzzy Analytic Hierarchical Model (FAHP)(case study: minoodasht city)

An appropriate urban landfill site selection prevents environmental issues in cities. The study aimed to identify suitable sites for landfill site selection based on an estimated population of 20 years and the area required for landfill sites in Minoodasht city by using Fuzzy logic model in GIS and Fuzzy Analytic Hierarchical (FAHP) .

Selecting a suitable site for landfill requires several factors which using spatial data and its integration with other planning and management activities is necessary according to the complexity of affecting factors in site selection. For this purpose deployment of the integrated Geographic Information Systems (GIS)and multi-criteria decision-making methods (MCDM) are the perfect tools for landfill site selection.
Findings: The present study focuses on using many data layers including ; Distance from roads¡ elevation¡ slope¡ land use¡ precipitation¡ distance from faults¡ distance from surface waters¡ distance from protected areas¡ geology and Distance from city and villages for an appropriate landfill sites site selection of minoodasht city. the maps of each data layer ¡ standardized in IDRISI software and were prepared in the form of Fuzzy Then¡ in order to integrate the layers¡ Fuzzy analytic hierarchy process (FAHP) and GIS were applied.

Ultimately the final maps performed by applying 5 operators of fuzzy Gamma¡ Fuzzy Product¡ Fuzzy AND ¡ Fuzzy OR and Fuzzy SUM. Then¡ suitable landfill site selection maps were chosen and each of them classified to four categories of: suitable¡ average¡ weak and very weak. And suitable category became dappling. Methods which their Spots area were less than required area of landfill were excluded. Finally (AND)¡ (GAMMA) methods with 0.9 number¡ determined a suitable landfill site for a period of 20-years.