Abstract
With the recent fast economy development and rapid urbanization, the huge generation of construction waste has become a threat to sustainable development in China. Though efforts have been made to promote reuse and recycling of construction waste, landfilling of waste remains the most commonly adapted approach for construction waste disposal. As the space for landfills is limited and because of the negative issues in terms of environmental and social aspects that may be caused, the appropriate site selection of landfills is crucial. With this background, this paper aims to establish a framework for facilitating landfill selection for construction waste. To begin with, a total of sixteen factors that may influence landfill site selection were identified from a literature review. Then, based on the combined analytic hierarchy process (AHP) and entropy method, the weights and the final comprehensive scores of the identified factors were calculated. According to the derived results, potential sites for landfills were divided into three levels, namely the most appropriate (0.38%), appropriate (17.58%), and inappropriate (82.04%). The proposed decision-making methods in this paper can provide a valuable reference for the selection of construction waste landfill sites.
Highlights
The economy in China has experienced a rapid growth in the past two decades
The data used for the Analytical Hierarchy Process (AHP)-entropy approach were collected from a questionnaire survey
Five experts who had rich knowledge and experience on construction landfill site selection were invited to participate in the survey
Summary
The urbanization rate increased from 45.2% in 2007 to 57.9% in 2017 [1]. Along with the rapid urbanization, the amount of waste generated from new construction and demolition activities grew at a high rate [2,3,4]. Landfills occupy land resources and may cause water pollution, harmful gas emission, and have other negative impacts on the environment [9,10,11,12,13], selecting an appropriate construction waste landfill location is essential for sustainable urban development. There have been several studies focusing on the site selection of waste treatment facilities, as shown, where it can be seen that multi-objective modeling was widely used in early studies, such as Giannikos [14], Rakas, et al [15], etc.
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