Combining geographic information system, multicriteria evaluation techniques and fuzzy logic in siting MSW landfills |
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| Authors: | Alexandra Gemitzi Vassilios A Tsihrintzis Evangelos Voudrias Christos Petalas George Stravodimos |
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| Institution: | (1) Department of Water Resources Management, Regional Authority of Eastern Macedonia and Thrace, 69100 Komotini, Greece;(2) Laboratory of Ecological Engineering and Technology, Department of Environmental Engineering, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece;(3) Laboratory of Solid Waste Management, Department of Environmental Engineering, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece |
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| Abstract: | This study presents a methodology for siting municipal solid waste landfills, coupling geographic information systems (GIS),
fuzzy logic, and multicriteria evaluation techniques. Both exclusionary and non-exclusionary criteria are used. Factors, i.e.,
non-exclusionary criteria, are divided in two distinct groups which do not have the same level of trade off. The first group
comprises factors related to the physical environment, which cannot be expressed in terms of monetary cost and, therefore,
they do not easily trade off. The second group includes those factors related to human activities, i.e., socioeconomic factors,
which can be expressed as financial cost, thus showing a high level of trade off. GIS are used for geographic data acquisition
and processing. The analytical hierarchy process (AHP) is the multicriteria evaluation technique used, enhanced with fuzzy
factor standardization. Besides assigning weights to factors through the AHP, control over the level of risk and trade off
in the siting process is achieved through a second set of weights, i.e., order weights, applied to factors in each factor
group, on a pixel-by-pixel basis, thus taking into account the local site characteristics. The method has been applied to
Evros prefecture (NE Greece), an area of approximately 4,000 km2. The siting methodology results in two intermediate suitability maps, one related to environmental and the other to socioeconomic
criteria. Combination of the two intermediate maps results in the final composite suitability map for landfill siting. |
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| Keywords: | MSW landfill siting Multicriteria evaluation Geographic information systems Analytical hierarchy process Order weighted average |
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