Site selection of construction and demolition wastes landfill using Multi-Criteria Evaluation (MCE) methodology

Today, site selection is an important and necessary issue for construction and demolition wastes management in population fast-growing regions. Therefore, the main purpose of this research that was sponsored by Karaj municipality is landfill site selection for CDW in Karaj city with geographic information system (GIS) and multi-criteria evaluation (MCE) method. At first, by studying literature review, the criteria and sub-criteria necessary for site selection were identified. Four criteria and sixteen sub-criteria were selected by Delphi method. Weighting of criteria and sub-criteria was done by AHP method and expert choice software. All of the sub-criteria were mapped, standardized and overlaid in Arc GIS and IDRISI software environment by weighted linear combination (WLC) method. Finally, four alternatives (A1-A4) with a total area of 9700 hectares (4.7% of the total area of Karaj) have the the highest suitability, for CDW landfill in Karaj. These alternatives were ranked with TOPSIS method as A2>A4>A3>A4.