Utilizing GIS linked to AHP for landfill site selection in Rudbar County of Iran

A comparison of fuzzy logic and TOPSIS methods for landfill site selection according to field visits, engineering geology approach and geotechnical experiments (case study: Rudbar County, Iran)

“…Rudbar County is located in the north of Iran and is bounded by the latitudes of 340000 to 419000N and the longitudes of 4047000 to 4109000E in 39N zone according to the World Geodetic System 1984 datum and Universal Transverse Mercator coordinate system (Mortazavi Chamchali et al, 2019) (Figure 1). The domain of heights varies from 20 m to 1780 m. More than 35% of its fields are located at the height of 200 m or plain, about 15% of its fields are located at a height of 800 m or foothills, and approximately 51% are located at the height of 1000 m or more (Mortazavi Chamchali et al, 2019). The average amount of annual rainfall was between 250 and 1250 mm due to the relatively low height and it is mostly raining in the autumn.…”

“…The average amount of annual rainfall was between 250 and 1250 mm due to the relatively low height and it is mostly raining in the autumn. The annual evaporation of the region under consideration varies between 900 mm in northern areas to 2250 mm in southern areas (Mortazavi Chamchali et al, 2019). The temperature changes between 10°C in heights and 18°C in lower areas (Mortazavi Chamchali et al, 2019).…”

“…The annual evaporation of the region under consideration varies between 900 mm in northern areas to 2250 mm in southern areas (Mortazavi Chamchali et al, 2019). The temperature changes between 10°C in heights and 18°C in lower areas (Mortazavi Chamchali et al, 2019). The rough and rugged morphology of this region is due to the presence of hard basalt rock, silica tuff, rhyolitic and volcanic rocks with altered and soft rocks (Figure 2), and the erosion performance of seasonal and permanent streams originating from heights (Mortazavi Chamchali et al, 2019).…”

“…To accelerate the decision-making process and to prevent gathering extra data, it is necessary to identify and restrict improper regions by considering involved criteria in the determination of a proper site for landfill construction (Mortazavi Chamchali et al, 2019). The cornerstone of selecting these restricted parameters is the existing standards about the suitability of a location for landfill construction.…”

“…At the end of this stage, maps of each restricted parameter can be obtained as a map with 1-pixel value for proper regions and 0-pixel values for improper regions (Mortazavi Chamchali and Ghazifard, 2019). After the identification of proper regions for landfill construction, the composition of these maps is required to extract proper regions from restricted maps and to find susceptible regions (Mortazavi Chamchali et al, 2019). To do so, the RASTER CALCULATE in ArcGIS10.1 software was used to compose the maps obtained from the previous stage and then 1-pixel value was gained and finally, the primary map of susceptible regions was achieved.…”