Integration of Geographic Information Systems and Multicriteria Decision Analysis for Landfill Site Selection: A Case Study of Kirkuk Governorate, Iraq
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Abstract
Waste landfills are dangerous to the surrounding environment and human health, so choosing their locations according to scientific methods is necessary. This research aims to find available and suitable sites for constructing a landfill in Kirkuk and its neighboring areas, i.e., Taza and Laylan districts. The present study combines many factors, such as the road network, the villages surrounding the cities, oil pipelines, hospitals, and the electrical transportation network. In addition, the present study extracted the urban areas and water bodies using the random forest classification method to find the constraint areas. The basic criteria were used to find the most suitable areas for landfill construction after weighting using the weighted average method, which included the stable groundwater level, soil type, and land slope. The findings revealed that the available land and constrained land areas were 613.56 km2 (44.84%) and 754.78 km2 (55.16%), respectively. Moreover, the findings of land suitability were classified as very low, low, moderate, high, or very high suitability. The medium suitability had an area of (189.75 km2), while the high and very high suitability areas covered 187.69 km2 and 153.94 km2, respectively. Subsequently, four specific sites (two sites in Laylan, one in Taza, and one in Kirkuk City) were proposed for constructing new landfills in the area.
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