Integrating spatial information technologies and fuzzy analytic hierarchy process (F-AHP) approach for landfill siting

Abstract

Rajshahi is considered as one of the most growing cities in Bangladesh with enormous potentialities for physical and environmental development. The city has taken over air pollution, and it should now shift their focus on preparing to face the consequences of rapid urban growth. With unorganised solid waste management even after the absence of industries and mega industries, the city has a chance of collapsing in the period of potential future massive development movement. In order to combat this potential risk during that period, the landfill can be applicable in this developing city being the cheapest and straightforward method. Concerning this, this study attempts to identify suitable places to dispose of Metropolitan Solid Waste (MeSW). To select suitable sites for landfills, several critical factors, such as geology/hydrogeology, land use, aspect, slope, and distance from the surface water body, settlements, roads, railway, and protected areas, were chosen according to standards and regulations. Weights of criteria are determined using the Fuzzy Analytical Hierarchy Process (F-AHP), and then the weighted overlay analyses are used to nominate landfill sites. According to findings extracted, only about 6% area is highly suitable, and 22% of the area is moderately suitable for the landfill site development. Considering parameters such as minimum required area for landfills, buffer distance from residents, major roads and agricultural lands, political and management issues, and having discussions with key personnel, the study opts two potential sites for landfill development. Inappropriate landfill locations other than this will lead to adverse environmental, economic, and ecological externalities.