ASSESSMENT OF SUITABLE LANDFILL SITE USING GEOSPATIAL TECHNIQUES: A CASE STUDY OF RAIPUR URBAN REGION, CHHATTISGARH, INDIA

Currently, the solid waste management work of Raipur is being done in a completely traditional way, which is very expensive and time consuming. The site selection method using Geospatial techniques can function as a decision support tool for enhanced efficient and effective management of municipal solid waste. This Study’s aim was to develop landfill siting by crossing major barriers such as political, economic and environmental pressures for the execution of a suitable site criteria by employing combination of geospatial technique and Weighted Linear Combination (WLC) of Multi-Criteria Decision Analysis (MCDA) in Raipur urban area. The preliminary step of the methodology was geospatial operation and Study that disqualified all areas unsuitable for landfill siting. The insularity of suitable criteria for landfill site was generated based on published information on solid waste management, existing laws and regulatory necessities, as well as the existing local conditions. The different suitability criteria considered are soil, land use land cover, digital elevation model (DEM), surface waters, transport network, lithology and geological structures. Criteria were mapped using the geospatial technique; each criterion was identified and weighted by score for overlay to create suitability maps using GIS. The final results showed that there are more locations for landfills for Raipur urban area. In the present Study there are sporadic areas identified as suitable sites for landfill location. In the site suitability analysis 74.79% area found not suitable for landfill siting, 20.93% least suitable and 3.25% moderate suitable. Out of the remaining area, 1.03% area is found most suitable.

A worldwide meta-analysis review of restriction criteria for landfill siting using geographic information systems

One of the most crucial parts of solid waste management is determining landfill site location, since multiple factors must be considered and there is no universal formula. The main purpose of this study is to make a worldwide systematic review of restriction criteria used for landfill siting using geographic information systems (GIS). Literature from the last years was thoroughly assessed, and 45 restrictions found were classified as environmental, economic, or social criteria. Our findings show that although the number of articles published has increased recently, they use on average seven restrictions, focusing mainly on environmental over economic and social criteria. In our boxplot statistical analysis, the most frequently used environmental restrictions are the distance from surface water resources (used in 77% of articles), slope (52%), and distance from groundwater founts (40%), with a median of 300 m, 20%, and 250 m, respectively. The most frequently used economic restrictions are distances from roads (60%), airports (40%), and power lines (18%), with medians of 275 m, 3000 m, and 75 m, respectively. The most frequently used social restrictions are distances from urban areas (45%), settlements and residential areas (40%), and cultural heritage or archaeological areas (23%), with medians of 1000 m. This information might help, on the one hand, governments to develop new legislation about landfill siting and on the other hand, decision-makers and scientists to produce new studies with different restrictive scenarios.

Integrating Local Community Perception and Expert’s Knowledge in Spatial Multi-Criteria Evaluation (SMCE) for Landfill Siting in Musanze Secondary City

Illegal dumping and landfilling of solid waste is a thoughtful concern nowadays. Solid wastes are disposed in open dumping sites and there is a lack of effective selection of potential and suitable site (s) for landfill, due to the ignorance of all criteria to be integrated in process of decision making. The purpose of this research is to find the most suitable site(s) for the construction of modern landfills using spatial multi-criteria evaluation (SMCE) and addressing the existing gap in involving the local community in the process of siting. Seven criteria of siting were selected combining national and international guidelines for landfill siting criteria. Selected criteria thresholding and ranking decision were grounded on local community preferences. Suitable criteria proximity distances were assessed with a questionnaire survey and further weighted using Expert’s knowledge depending upon their relative importance. Final spatial overlay analysis results showed that the majority of the total area (98.31%) is classified as unsuitable, with 0.05% of the total area being less suitable, 1.21% moderately suitable and only 0.43% of the total area is most suitable. Only 2 sites were found to be qualified as the most suitable and have the capacity of serving at least 10 years. This study is a model for filling the gap of community consultation during the process of landfill siting. It is also a very supportive tool for decision-makers to reduce “Not in my backyard” (NIMBY) phenomenon of waste disposal as well as environmental problems associated with illegal dumping. Keywords: Landfill Siting, Expert’s knowledge, Local community preferences, Spatial Multi-Criteria Evaluation.

Suitability Analysis for Sanitary Landfill Site in the Province of Ifugao, Philippines

Solid wastes generation is an alarming contemporary environmental issue. As part of national strategies in solid wastes management as stipulated in RA 9003 otherwise known as the Ecological Solid Wastes Management Act of 2001 is the establishment of sanitary landfills by the local government units. This study aims to assess and identify key suitable sites in the province of Ifugao in accordance with the sanitary landfill siting area requirement and generate sanitary landfill suitability map. This study utilized weighted overlay analysis of required maps based on landfill siting area requirement using ArcMap GIS software licensed to UPLB. Based from the generated sanitary landfill suitability map, there are areas fall on restricted, low, moderate, high, and very high suitability for sanitary landfill site in which large areas of Ifugao province fall on restricted zone. Only three municipalities have land areas that fall under the category of very high suitability, namely Alfonso Lista (1,287 ha), Aguinaldo (9 ha), and Hungduan (2 ha). Municipality of Alfonso Lista has the largest area fall on high suitability. Also, the top three municipalities in terms of land area under high suitability are Alfonso Lista (14, 232 ha), Aguinaldo (11, 907 ha), and Lagawe (5, 817 ha).

Site Selection For Sanitary Landfill in Kuksi Region in Albania, Using Multi-criteria Analysis Evaluation

Landfill is a common solution for the final disposal of municipal solid waste (MSW) in Albania. Landfill siting is an extremely difficult task to accomplish because the site selection process depends on different factors and regulations. To ensure that an appropriate site is chosen, a systematic process should be developed and followed. Unsuccessful landfill siting is typically the result of strong public opposition. In this study, 11 candidate sites for an appropriate landfill area in Kukës Region are determined by using the integration multi-criteria evaluation (MCE). From the application of the exclusion criteria provided in the study methodology, it was able to find the best three alternatives. The statistical processing for the determination of the best place was accomplished through Multi-criteria Analysis and Environmental Management. The application of this method has led to the identification of the most suitable site for the construction of sanitary landfill in the Kukës Region.