Volume 11, Issue 2 (9-2018)                   ijhe 2018, 11(2): 225-236 | Back to browse issues page

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Fallah M, Pirali Zefrehei A, Hedayati S. Evaluation of water quality of the Anzali international wetland using TOPSIS method . ijhe. 2018; 11 (2) :225-236
URL: http://ijhe.tums.ac.ir/article-1-6014-en.html
1- Department of Environmental Sciences, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran , Maryam.fallah85@gmail.com
2- Department of Aquatics Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
Abstract:   (1696 Views)
Background and Objective: Due to the vulnerability of water resources, quality control of surface water is one of the key issues in environmental conservation programs. In recent years, Anzali wetland has been exposed to numerous threats, including environmental pollutants. TOPSIS is an efficient and reliable way to assess the quality of water resources.
Materials and Methods: In order to evaluate water quality condition, Biochemical Oxygen Demand (BOD), Dissolved Oxygen (DO), temperature, pH, turbidity, Total Suspended Solid (TSS), phosphate (PO4-), nitrate (NO3-) and Fecal Coliforms (FC) were measured seasonally from 10 sites of Anzali International Wetland in 2014 and the water quality condition was estimated using TOPSIS method.
Results: The highest BOD5, phosphate, temperature and fecal coliform were measured at station 8. Comparison of TOPSIS values in different sampling stations showed the minimum (0.339) and maximum values (0.689) at the stations 5 and 8, respectively. According to the result, the station 5 (Sorkhankal) had the best water quality condition and station 8 (Pirbazar) had the lowest one. Also, seasonal results of TOPSIS values showed that the maximum value was at spring (0.742).
Conclusion: Discharge of effluents from land uses, agricultural and industrial activities located along the stream, could be considered as important reasons for decreasing water quality. Our results showed that TOPSIS method was clearly able to demonstrate the qualitative changes of water resources, indicating a moderate water quality for Anzali international wetland.
Full-Text [PDF 1884 kb]   (426 Downloads)    
Type of Study: Research | Subject: WATER
Received: 2018/01/7 | Accepted: 2018/07/10 | Published: 2018/09/22

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