Landfil location in Quchan city using the integration of the GIS system and the MCDA method

Solid waste burying is the last option in solid waste management. In this regard, the main objective is the safe and long-term disposal of solid waste with consideration of environmental and health aspects. Various variables should be considered in the location. Therefore, identification of ways to achieve this goal is necessary and necessary. The present research was carried out to determine the environmental location of urban waste landfills in Quchan city using Analytical Hierarchy Process (AHP) and fuzzy model, GIS (Geographical Information System (GIS)) using Expert Choice software. . In this research, the layers necessary for the location of 12 layers including geological maps, soil study, land use, slope of the area, topography, the location of villages, urban areas, surface water and underground waters, direction The dominant winds, roads and faults were collected and then, based on landfill landfill criteria, the layers were scored and weighed. The maps after the final weighting obtained from the hierarchical process were combined and the final map was extracted. Based on the final map of the fuzzy logic model and hierarchical analysis, 46% are in prohibited areas, 8% have inappropriate conditions, 24% have moderate conditions, 14% have good conditions, and 8% have very good conditions. Two Its area is suitable and very suitable and is located in the southwest. In these areas, the groundwater level is low and the lithology of the area is tuff dacity and latite.