Site selection for waste landfill in the new city of Hashtgerd using multi-criteria decision-making models AHP and TOPSIS

 Waste management program is carried out in urban areas in order to prevent the effects and risks of environment and health on public health. The purpose of this study is to select a landfill in the new city of Hashtgerd according to the criteria defined by the Environmental Protection Organization and the Management and Planning Organization.

 Based on these criteria, environmental parameters were studied and the maps were prepared by the geographic information system in the study area. AHP method was used to weight the environmental layers and these weights were defined for each environmental layer separately in the GIS and all weighted layers were combined using GIS.

 The results of the GIS identified 3 areas suitable for the construction of landfills. In order to prioritize the 3 options obtained, a multi-criteria decision model was used to create the burial site, and among the methods defined in the MCDM model, the TOPSIS method was selected to prioritize the options. TOPSIS method calculations were performed using TOPSIS SOLVER software.

 The results of this software show that option 2 is the best option for constructing a landfill at the study area. One of the most important solutions in the location process is the use of remote sensing and the use of international standards.