Site Selection of Construction Waste Landfill Based on Combination of Fuzzy AHP and Geospatial Information System (GIS) (Case Study: Qazvin, Iran)

Document Type : Research Article

Authors

1 M.Sc. of Islamic Azad University of Science Research Branch

2 Associated Professor of Islamic Azad University Tehran Science and Research Branch

3 Assistant Professor at K N Toosi University of Tech.

4 Assistant Professor at K. N. Toosi University of Technology

Abstract

Today, with the increasing urban development, construction waste is a major problem for urban life. The city of Qazvin is no exception to this, and researching an optimum landfill site is an important necessity. The purpose of this research is to optimum site selection areas for landfill Construction wastes using the geospatial information system (GIS) in a boundary area of ​​Qazvin County which taking into account the terms and conditions of organizations such as the Municipality, Waste Management, and Environmental Protection Organization. In this study, 16 layers of information including geology, soil type, and permeability, landuse, climate, river distance, distance from protected areas, aspect, etc. in the boundary of Qazvin County were used. After producing the preliminary maps, the sub-criteria of each information layer are classified and evaluated and the values are converted to fuzzy values ​​between zero and one. Then, the fuzzy analytic hierarchy process (FAHP) method has been used to determine the absolute weight of each information layer and by integrating and overlapping weighted layers, a suitability mapof the construction landfill site for Qazvin city is produced.According to the suitability map, sites for landfill were identified in five distinct zones, and fields with high area among fields of the fifth zone (with value 9) were suggested as the best landfill site for 40 years. The results showed that northwest of Qazvin due to good soil type, suitable landuse, distance from rivers, faults, and access to communication road and dry climate could be the most suitable site for landfill.

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References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 7
October 2021
Pages 2909-2920

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