Locating construction waste landfills using fuzzy logic and hierarchical analysis process (case study: Ilam city)

The aim of the current research is to locate construction waste disposal sites in Ilam city. Identifying the optimal sites for the disposal of construction waste is one of the basic steps in the field of urban waste management. In the present study, the process of locating construction waste disposal sites in Ilam city was carried out in four basic steps. In the first step, variables affecting the location of construction waste disposal sites were prepared in the form of thematic layers in the framework of the Geographical Information System (GIS) and were spatially evaluated. In the second step, the subject layers were dimensioned and their values were revalued using fuzzy functions. In the third step, the weight of each of the research criteria was calculated using the Analytical Hierarchy Process (AHP) model. In the last step, the subject layers were combined with each other based on the coefficients obtained from the AHP model and the land suitability layer was obtained in order to dispose of construction waste. The results show that the three variables of distance from the city, slope and distance from the main roads, with weights of 0.292, 0.208 and 0.145 respectively, are the most important variables affecting the optimal location of construction waste in Ilam city. are counted Also, two areas located in the southwest and northwest of Ilam city were proposed to create construction waste disposal sites.