Transshipment site selection using the AHP and TOPSIS approaches under fuzzy environment.
ABSTRACT Site selection is an important issue in waste management. Selection of the appropriate solid waste site requires consideration of multiple alternative solutions and evaluation criteria because of system complexity. Evaluation procedures involve several objectives, and it is often necessary to compromise among possibly conflicting tangible and intangible factors. For these reasons, multiple criteria decision-making (MCDM) has been found to be a useful approach to solve this kind of problem. Different MCDM models have been applied to solve this problem. But most of them are basically mathematical and ignore qualitative and often subjective considerations. It is easier for a decision-maker to describe a value for an alternative by using linguistic terms. In the fuzzy-based method, the rating of each alternative is described using linguistic terms, which can also be expressed as triangular fuzzy numbers. Furthermore, there have not been any studies focused on the site selection in waste management using both fuzzy TOPSIS (technique for order preference by similarity to ideal solution) and AHP (analytical hierarchy process) techniques. In this paper, a fuzzy TOPSIS based methodology is applied to solve the solid waste transshipment site selection problem in Istanbul, Turkey. The criteria weights are calculated by using the AHP.
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ABSTRACT: The increase in the popularity of using environmental design criteria in town and country planning has brought about the need to fully identify the principles to determine the best location of hazardous wastes to be landfilled. This environmental management issue has received considerable attention because of its applications in urban and rural infrastructure planning, industrial development planning as well as health, housing, transportation and agricultural schemes. This paper explains a method to determine how to locate suitable sites for hazardous waste landfilling area by using the site screening study. It demonstrates how the criteria such as geology, topography, land use, climate, earthquake and other related factors can be introduced into the overlayer technique to determine the suitable site selection in a region. The research was undertaken in the Southeastern Anatolia Project (known as GAP in Turkey) region where identifying the land resources is crucial for agricultural and water management purposes. The paper also explains the validity of the method employed on the site selection process for hazardous wastes. The introduced method may enable more accurate design procedure for planning in environmental management in future.Engineering Geology. 01/2005;
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ABSTRACT: This article discusses a methodology for assessing and ranking a predefined universe of objects to assist in the selection of suitable areas for the construction of sanitary landfills. The methodology is, in principle, for universal application. Its development was initially based on the 'Value Analysis' methodology and then on the 'Fuzzy Eigenvector Method', or 'Fuzzy Logic' as it is sometimes referred to. The focus of the study herein is on the comparative appraisal of a group of elements which are part of the guidelines to be adopted when determining the choice of the most suitable site for a sanitary landfill. This set of guidelines includes technical, economical, environmental, social and political aspects. As an example of the methodology proposed, four different areas were chosen. They were studied to determine which is the most appropriate site for the development of a new solid waste fill site. The results for these four areas, together with the functions chosen and function weights, are presented here.Environmental Monitoring and Assessment 06/2003; 84(1-2):129-40. · 1.59 Impact Factor