Site Selection of Waste Water Treatment Plant using GIS and TOPSIS (Case Study: Qeshm Island)

Subject Areas : Geopolitic

Mahdi Fallah ¹ , Manouchehr Farajzadeh ² , Hassan Vagharfard ³ , Ali Nik kheslat ⁴

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Received: 2014-11-25 Accepted : 2014-11-25 Published : 2013-05-22

Keywords: Qeshm, Waste water, Treatment plant, TOPSIS, GIS,

Abstract :

Today there is a high demand for water, particularly in arid regions, which is attributed due tothe increasing world population with its agricultural and industrial activities from the one sideand, over the last few years, increasing drought from the other side.Thus it is a priority toinvestigate the proper site selection of a waste water treatment plant. In this study, locationsfor the waste water treatment plant for the city of Qeshm, Hormozgan Province wereinvestigated. Treatment plant operation requires a number of policies, regulations and data.The importance of the above mentioned factors are essential in consideration of site selection.Therefore, we considered the slope of the land, elevation difference with respect to Qeshm,land cover, land use, distance from town and additional data for this project. We gavedifferent weights to each data, according to AHP, and determined which slope received themost weight value. Following this process, we categorized the data into four classes accordingto the TOPSIS model. This model selects the shortest distance from the highest level of theclasses and the longest distance from the lowest class. The end result showed that the modelselected 109 km2 of Qeshm Island that would be a suitable area for creating a waste watertreatment plant.