Integrating Ordered Weighted Average(OWA) techniques with geographic information Systems for landfill site selection (Case study: Metropolis of Mashhad)

Environmental protection is one of the most priorities in Land use planning. In this regard, place and location have the greatest role and its importance is increasing when the adverse effects of environmental neglect, can cause irreversible situation. Selection a suitable location for the burial of solid waste can prevent the unfavourable ecological and socio – economic effects. Landfill site selection requires spatial data analysis, acceptable rules and standards. Choosing the various factors and therefore the number of Map layers, decision-makers to lead them unconsciously into a system that in addition to high accuracy also has high speed and simple of operation. Nowadays, these processes are using spatial models and GIS in the desired method is provided. A selected landfill is an important process in urban planning that effect on economic and environmental sectors and environment hygiene. Multi-criteria evaluation methods and GIS can use as an efficient tool for managing and applying layers seeking information in the place. In developed countries and also in Iran, a great deal research has been done in this field. This study with utilize past experiences and applying GIS technology want to provide a method for landfill site selection.