Environmental Risk Assessment of Wetlands Using TOPSIS and EFMEA

Gavkhoni wetland one of the most important wetlands in the countrys, that with unique habitat features had been registered in the list of wetlands of international Ramsar Convention in the June 23, 1975. This study (2012) aims to identify and analyze the risks that threaten Gaavkhoni wetland which is located in 140 km southeast of the isfahan city. After identifying the risks, analyzing and ranking them was done by using TOPSIS. Analytical Hierarchy Process (AHP) was used for determining occurrence probability and Environment Failure Mode and Effect Analysis (EFMEA) were used for determining other criteria. Results shown that risk of drought and low water of wetland and Construction of Zayandehrood dam were the first to second in priorities. After determining the risk priority number by TOPSIS, risk levels were determine that show the priorities of management to control the risks. The advantage of TOPSIS in environmental risk assessment is ranking of risk by different criteria. By using this method in environmental risk assessment, infinitely risk can be ranked based on the infinitely criteria. High accuracy and use of spreadsheet software are other advantages of this method.