Location of solid municipal waste landfill using gis (Case study of Osco city)

Solid wastes are an integral part of human life, and the production of these wastes in different quantities and qualities is one of the greatest environmental problems of the present age. To reduce the negative consequences of the waste, the use of new tools and technology to find a suitable landfill location is necessary. Today, geographic information systems are widely used in environmental planning. The central part of the city of Shahindezh, with daily production of 10 ton of waste per day, due to the lack of equipment and inappropriate location of landfill, has caused environmental, social and many health problems. In this research, in order to determine the proper location for solid landfills in the city of Osco, various indices such as Lithology, land use, vegetation cover, soil profile, topography, distance from urban areas and distance from main road, main waterways and Subsurface, residential areas, wells and faults in landfill location have been considered. For mapping capability, firstly, forbidden areas is deleted and 9 layers of weighing information, the process of analyzing of final map is prepared. Finally, proper areas of landfill in Osku city have been identified based on the location of the site in the form of four suitable and not suitable classifications. Based on the results of this study, 3 suitable zone were selected which were compared with each other after field visits from zone using TOPSIS method. Area having number 0 , in northeastern of Osku, based on the scores and having characteristics such as appropriate distance to population centers and access roads, proper slope, proper lithology, lack of vegetation and etc, with the least environmental impacts is determined as the preferred option.