Landfill Site Selection of Construction and Demolition Wastes Using GIS and AHP Method (A Case Study of Hamedan City)

Subject Areas : Waste Management

Fateme Jafari Nobakht ¹ ( M.Sc. Student, Environmental Science, Faculty of Science, Islamic Azad University, Hamedan Branch, Hamedan, Iran )
Mehrdad Cheraghi ² ( Associate Prof., Department of Environmental Science, Faculty of Science, Islamic Azad University, Hamedan Branch, Hamadan, Iran )
Bahareh Lorestani ³ ( Associate Prof., Department of Environmental Science, Faculty of Science, Islamic Azad University, Hamedan Branch, Hamadan, Iran )

Received: 2015-10-06 Accepted : 2016-10-25 Published : 2020-11-21

Keywords: Wastes, Geographic Information System (GIS) and AHP, Landfill site selection, construction and demolition wastes (C&DW),

Abstract :

Background and Objectives: Population growth, urban development, and increased human activities will bring various outcomes, including the production and accumulation of waste, followed by environmental pollution. In developing countries, construction waste accounts for a large proportion of municipal waste, which in addition to the high cost of disposal, also has adverse effects on the environment. Because construction debris takes up a lot of space due to its bulk, disposing of it in landfills reduces the useful life of these areas and it is necessary to find a new place to bury construction debris. Method: Searching for a new landfill is a complex and time consuming process and requires a capable and efficient system, as using GIS and combining different layers of information and considering environmental, social and economic criteria, the most suitable landfill can be found. Located a building. In the present study, 16 criteria (slope, land use, residential, commercial and industrial centers, villages, roads (including 3 layers of highways, main roads and side roads), water (including 6 layers of wells, springs, aqueducts, Rivers, dams and waterways), antiquities, airport runways and mines) are involved in the location process, so that privacy and distance maps are prepared first ,then, in order to achieve more reliability, scoring the classes or parameter intervals was done in three ways. Criteria were weighted using Expert Choice software and hierarchical analysis (AHP). Findings: The results of the three types of scoring to multi-criteria analysis showed that there were significant differences in the results of different methods of scoring. Discussion and Conclusions: The results of combining 16 parameters involved in site selection in software Arc GIS9.3 showed that the appropriate zones for construction and demolition wastes buried in Hamadan, often are located in a 90-degree slice.

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