Environmental risk evaluation of the exploitation of the lake in twenty second region of Tehran by using MADM multi criteria decision

Subject Areas : Water Pollution

M. Heidari ¹ , S. Rezayan ² , R. Nezakati ³

1 - Dept. of Environment and Energy, Islamic Azad University Tehran Science and Research Branch
2 - Dept. of Environmental Engineering, Engineering Faculty, Islamic Azad University Shahrood Branch
3 - Dept. of Environmental Engineering, Engineering Faculty, Islamic Azad University Tehran North Branch

Received: 2015-05-12 Accepted : 2015-06-08 Published : 2015-06-21

Keywords: TOPSIS, analytical hierarchy process, FMEA, Risk Assessment,

Abstract :

Synthetic man-made Persian Gulf Martyrs Lake in the North-West of Tehran, in the 22nd region, with a volume of 10 million cubic meters, an area of 224 hectares and an average depth of 10 meters, is the largest man-made lake in Iran. In this study to assess the risks arising from the exploitation phase of Persian Gulf Martyrs Lake, multi-criteria decision making, MADM, was used. In this regard, the risks of exploitation using questionnaire, were also analyzed using SPSS software and TOPSIS method. For the risk factors and prioritization of the risks of the lake, Analytical Hierarchy Process (AHP) was used. In this method, for the hierarchical structure analysis of the risks of the lake, matrix pair comparison was performed using pairwise comparison of each of the criteria options and in relation to each other. Finally, to determine the probability of occurrence of each risk, Expert Choice software was used; also using FMEA logic, the results were assessed. Based on the results, it was found that in the physical & chemical environment, impact on ground water and sedimentation was the most important risk factor and eutrophication was identified as the most important biological risk.