Landfill site selection using GIS technology and the analytic hierarchy process (original) (raw)
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Landfill Site Selection Using GIS and Analytical Hierarchy Process
Site location of a Landfill for disposing of hazardous wastes is undoubtedly a main task in solid waste management. Existence of many conflicting criteria has changed the decision making framework to be a difficult and complex process. A systematic two-stage procedure for proper landfill sitting is presented here in a case study using geographical information system (GIS) tool and analytical hierarchy process (AHP). In the preliminary stage, thematic maps are rigorously obtained in GIS environment by considering all effective criteria such as wells, groundwater, rivers, cities, roads and so on. Unsuitable regions for landfill sites are then excluded from the thematic maps by using specified buffers defined for each criterion. In the second stage, a number of selected sites were ranked by using analytical hierarchy process (AHP). The prospective sites are compared to each other with respect to each criterion. The criteria are also compared through the development of pair-wise compari...
The Serbian National Waste Management Strategy for the Period 2010-2019, harmonized with the European Union Directives, mandates new and very strict requirements for landfill sites. To enable analysis of a number of required qualitative and quantitative factors for landfill site selection, the traditional method of site selection must be replaced with a new approach. The combination of GIS and the Analytic Hierarchy Process (AHP) was selected to solve this complex problem. The Srem region in northern Serbia, being one of the most environmentally sensitive areas, was chosen as a case study. Seventeen factors selected as criteria/sub-criteria were recognized as most important, divided into geo-natural, environmental, social and techno-economic factors, and were evaluated by experts from different fields using an AHP extension in Arc GIS. Weighted spatial layers were combined into a landfill suitability map which was then overlapped with four restriction maps, resulting in a final suitability map. According to the results, 82.65% of the territory of Srem is unsuitable for regional landfill siting. The most suitable areas cover 9.14%, suitable areas 5.24%, while areas with low and very low suitability cover 2.21 and 0.76% of the territory, respectively. Based on these findings, five sites close to two large urban agglomerations were suggested as possible locations for a regional landfill site in Srem. However, the final decision will require further field investigation, a public acceptance survey, and consideration of ownership status and price of the land.
Municipal solid waste generation is among the most significant sources which threaten the global environmental health. As an ideal selection depends on considering several independent factors concerning land use, socio economy and hydrogeology, the use of a multi criteria evaluation method seems inevitable. Taking benefit of geographic information system as a tool in combination with geographical information technology, equips the spatial decision support systems in appropriate site selection of sanitary landfills. The present study involves a kind of multi criteria evaluation method under the name of weighted linear combination by using geographical information technology as a practical instrument to evaluate the suitability of the vicinity of Giroft city in Kerman province of Iran for landfill. Water permeability, slope, distance from rivers, depth of underground watertable, distance from residential areas, distance from generation centers, general environmental criterion and distance from roads are the criteria which have been taken in to consideration in the process of analyzing. Superposing all of the raster type layers including geomorphologic, hydrologic, humanistic and land use criteria in land suitability, the final zoning of appropriate, fairly appropriate and inappropriate districts have been identified. Considering relative priority of all criteria in comparison with others, a specific weight is designated to each criterion according to their total influence on the whole process of decision making. The results from the application of the presented methodology are zones for landfill with varying zonal land suitability. Finally the zones will be ranked in descending order to indicate the priority of different options in front of the eyes of decision makers. The results achieved by this study may help policy makers of Giroft city by a variety of options for being considered as sanitary landfill locations.
Regional Landfill Site Selection with GIS and Analytical Hierarchy Process Techniques
Handbook of Research on Cultural and Economic Impacts of the Information Society
Increasing population and urbanization pose a huge challenge for municipal authorities to select suitable landfill site to dispose the increasing quantities of solid waste. Wrong landfill siting can result in social, environmental and economic cost. Therefore, suitable approaches are required to select landfill sites because that can enhance sound waste disposal practice in the fast-growing urban areas. The Geographic Information System based Multi-criteria Decision Analysis has been used in this chapter to examine the essentials of an effective site selection. GIS-based MCDA is an intelligent system that transforms spatial data into valuable information which can be used to make critical decisions. The analytical hierarchy process is utilized to assist the prioritization process. In Langkawi, disposal of municipal solid waste into open sites could lead to different adverse impacts on public health and the physical environment. This paper represents simple but effective method to assist landfill site selection efforts in the Langkawi.
Journal of Applied and Natural Science
Landfills are the most common method for the disposal of municipal solid waste the world over, as well as in India due to their low technical and economic requirements. The selection of an appropriate site for the establishment of a landfill is a complex process because it must combine social, environmental and technical parameters. The scientific selection of landfill site is based on several diverse criteria (Land Use and Land Cover, ground water table depth, soil permeability, surface water, roads distance, slop etc) and regulations. The study presents the selection of a site for the establishment of a landfill based on several criteria using geographic information system (GIS) based site suitability modeling and analytical hierarchy process (AHP). Site suitability modeling was implemented using Boolean and Index overlay models. Each criterion and sub criteria was evaluated with the aid of AHP to assign a relative weightage in the index overlay model. Rules and criteria’s set by ...
One of the important environmental issues in today's life is the undesirable influence of municipal landfill site on the environment, especially ground water. Thus, it is very important to find appropriate landfill sites. The most important aim of site selection for municipal landfill is to ensure that the selected site has minimum negative effects on the environment and society. There are various methods for landfill site selection, most of which are GIS-based and use digital information and their weighting to determine susceptible and inappropriate landfill zones. To determine the zones with acceptable landfill potential in city of Bojnourd, 16 digital layers prepared in GIS software were combined; as a result, the whole studied region was divided into different zones (appropriate to inappropriate) and classified according to the priorities. In this process, the best landfill site was identified in the west of the aquifer of Bojnourd. Finally, characteristics of the proposed and current landfill sites were separately investigated.
Al-Hillah Qadhaa is located in the central part of Iraq. It covers an area of 908 km 2 with a total population of 856,804 inhabitants. This Qadhaa is the capital of Babylon Governorate. Presently, no landfill site exists in that area based on scientific site selection criteria. For this reason, an attempt has been carried out to find the best locations for landfills. A total of 15 variables were considered in this process (groundwater depth, rivers, soil types, agricultural land use, land use, elevation, slope, gas pipelines, oil pipelines, power lines, roads, railways, urban centres, villages and archaeological sites) using a geographic information system. In addition, an analytical hierarchy process was used to identify the weight for each variable. Two suitable candidate landfill sites were determined that fulfil the requirements with an area of 9.153 km 2 and 8.204 km 2 . These sites can accommodate solid waste till 2030.
2021
Waste management has grown into a significant matter for cities in line with the population growth and increased urbanization. Waste must be properly disposed to avoid causing a problem for environmental and human health. A variety of methods are used to dispose waste. Sanitary landfill, which is among these methods, is one of the common methods used for its safety and affordability. In the implementation of this method, a suitable site selection is a major factor that affects the whole process ranging from the construction to the operation of a sanitary landfill. It is aimed to determine the most suitable solid waste sanitary landfills (SWSL) for the city of Denizli in consideration of site selection criteria regarding solid waste landfills. The relevant legislation, academic studies and the current situation of the study area were taken into consideration to determine site selection criteria for SWSL. In this context, residential areas, primary traffic roads, protected areas, slope, aspect, water surfaces, rock structure, fault line, hydrologic soil groups, land use capability classification and land cover were determined as a site selection criteria. In the study, Geographic Information Systems (GIS) was used in spatial analysis, and analytic hierarchy process (AHP), one of the multi-criteria decision making methods, was used in weighting the site selection criteria. According to the suitability map which is generated as a result of the study, 19.536,40 hectares (1.76%) of 1.109.742,16 hectares of the area was determined to be the "most suitable" for sanitary landfill while 260.520,26 hectares (23.48%) of it was determined to be "suitable". An ideal area was determined for the construction of a sanitary landfill on the areas determined as the "most suitable" in consideration of the requirements of the city of Denizli based on the projections for the year 2040.
APPLICATION OF GIS IN LANDFILL SITE SELECTION FOR SOLID WASTE MANAGEMENT IN AN URBAN ENVIRONMENT
APPLICATION OF GIS IN LANDFILL SITE SELECTION FOR SOLID WASTE MANAGEMENT IN AN URBAN ENVIRONMENT, 2020
Less economically developed countries are facing challenges resulting from poor solid waste management due to a number of reasons such as the rise in urban population, the construction era, industrial growth, and unsustainable consumption practices. Site selection of waste disposal and waste management for developing countries always pose major challenges. The application of Geographical Information Systems (GIS) and Multi-Criteria Decision Analysis (MCDA) in the location of landfills is still in its infancy. In this study we tested the suitability of pre-existing landfill locations by comparing them with the newly located landfills in the study area. In order to locate the sites of appropriate landfills, applied the Analytic Hierarchy Process (AHP) model of MCDA during criteria evaluation to give each criterion weight matching its importance. Our findings show that most suitable landfill sites constitute a low percentage (0.11%) than unsuitable area (91.95%). The Jaccard test produced an overlap of 22.72% and high deviation between the newly located landfills and the pre-existing Pomona landfill. Comparisons of the extent of suitable area for landfill site selection show that the proportions differ significantly (χ2 = 7305.8, df=2, p<0.0001). Our study is a cost effective verifiable tool in landfill site selection and assessing suitability of landfills to make economic and environmentally conscious decisions so as to ensure minimum damage to the environment.