Investigation a model based on multicriteria decision making-GIS for the site selection of hospital waste disposal based on environmental criteria: a case study from Tehran, Iran

Selection of unsuitable locations for disposal of hospital waste in the southeast of Tehran province is one of the environmental problems in this area, which has caused damage to the environment and pollution of groundwater in this area. It is the main, most acceptable and most economical method of disposal in many areas. The present study was conducted with the aim of locating the disposal site of hospital waste in the southeast of Tehran.

This study used a novel method for selecting HCW landfills in Tehran that relied on the fuzzy stepwise weight assessment ratio analysis method (FSWARA) and the geographic information technology system (GIS), which reduced comparisons in gathering expert opinions, simplified the selection process, and improved evaluation methods. The fuzzy Delphi approach was used to identify 9 criteria in the first place. The weight of each criterion was then calculated as information layers utilizing the FSWARA to produce the final maps for the relevant zones.

 Following that, the selected locations were ranked using the multi-attributive ideal-real comparative analysis method (MAIRCA), and the fourth point was chosen as the most suitable of the criteria with 34-degree slope, 1008 meters high, 3.4841 meters distance from fault, 8.4428 meters distance from surface water, 12 meters groundwater depth, 457 meters distance from residential areas, 6.4749.6 meters distance from hospitals, and 1598 meters' distance.

Finally, use the multi-objective optimization on the basis of ratio analysis (MOORA), technique for order of preference by similarity to ideal solution (TOPSIS), and vlse kriterijumsk optimizacija kompromisno resenje (VIKOR) methodologies to compare and validate the findings' dependability.