Environmental hazard assessment of Gomishan International wetland using conceptual framework DPSIR and TOPSIS

Document Type : Research Paper


Department of Environment, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran



Wetland have a great impact on the micro climate and maintain the hydrological and biological balance of each region. Therefore, this study was conducted to evaluate the environmental hazards of the Gomishan wetland based on the TOPSIS multi-criteria decision making method. In this study, the focus is on the environmental conditions of Gomishan wetland and all the stressor and factors that cause their ecological balance of the wetland are or investigated. In the first stage, description, system analysis and identification of regional risks based on DPSTR method, in the second stage, selection of three indicators (service of affect, probability of occurrence and sensitivity of the accepting environment) and scoring of risks and in the last step is to rank these based on the TOPSIS method. Results of DPSIR method, 15 risk factors where identified for Gomishan wetland. The result of ranking the risks threatening international wetlands using TOPSIS method. Indicated that the transfer of agricultural effluent to Atrak and Gorgan rood rivers and the transfer, transfer of fish and shrimp ponds effluent, effluent of Gomishan treatment plant and surrounding village and occurrence of droughts according to the amount of Claire in the first to fourth priorities, respectively. Also, based on hazard leveling, in Gomishan wetland 20% of hazards are in the unbearable category 6.6% of his hazards are in the significant category 13.4% of the hazards are in the significant category, 40% of the hazards are in the tolerable category and 20% are hazards in the category were partially located. Based on the results of this study, it is suggested that the managers of a single. Management in this wetland to meet the needs of local communities without the legal negative effect on physical, chemical and hydrological conditionals of the wetland in addition to meeting the water needs of the wetland.


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