The Application of Analytic Hierarchy Process (AHP) and Weighted Linear Combination (WLC) methods for landfill of Urban Solid Waste maerials Case Study: Marand County

Document Type : Research Paper

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Abstract

Finding an appropriate place for buring  landfill site is one of the most important parts of urban solid waste management system. Marand city with a population of 203,000 is one of the largest cities of East Azerbaijan Province. As a result of population growth, over-consumption nutrition habits, the increasing of consumption of packaging materials in recent decades, the solid waste volume has increased in this city. Despite this problem, still an appropriate method for waste disposal does not exist in Marand County. The main purpose of this study is to apply different spatial analysis operations, through GIS in order to locate suitable municipal solid waste disposal site. Therefore, factors affecting the positioning of Marand city landfill were extracted, digitized and weighted on the basis of 12 standard layers including slope, erosion, faults, surface water, groundwater, wells, regional conservation, vegetation, communication lines, power lines, distance from population centers in the county of  Marand and then entering the layers to the ArcGIS and Idrisi software environment. Multiple criteria decision and analytic hierarchy process and linear weighted combination of the existing layers were also applied. Preliminary results suggest that the model resulting from the AHP method selected landfill sites in the region was accepted. But with the implementation of WLC model range in the northwestern city of Marand was extracted with little difference, which is based on the field evidence and the comparison of results matching the existing realities. Finally, these models were overlapped and shared at the final place in the ArcGIS environment. Marand city proposed landfill area has an area of 299 ha and 130 tons of waste can be accepted for 20 years for each day.

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History

  • Receive Date: 23 September 2012
  • Accept Date: 23 September 2012

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