Assessment water quality indices using Physico-chemical parameters in Zayande rood Dam Lake

Document Type : Original Article


Faculty of Natural Resources (Fisheries), Isfahan University of Technology, Isfahan, Iran.


Background: Biological and ecological studies of water resources play the primary role in both types of researches and scientific studies. The Zayande-rood's dam lake is one of the vital water resources that provide drinking water for human populations in Isfahan, and This Lake also is water resources for agricultural sections of these provinces.
Methods: Five spots were defined as the sampling stations. Samplings were accomplished in 7 Steps, once every 45 days in 4 Seasons (2 times in each season). The water quality parameters (Dissolved oxygen, Nitrate, Nitrite, Electrical conductivity, pH, hardness, Total disolves solids, Ammonium, and Biochemical Oxygen Demand) were measured in all the stations and stages, and then water quality indexes were calculated.
Results and Discussion: results of this study showed that based on the WQI indicator, water quality (with an average of 74.41) was in well class and assessment appropriate for human consumption and drinking purposes. The highest amount NSFWQIa index was for stations 4 (74.93) and the lowest amount equal to (70.57) was the third station. According to the classification of water quality based on NSFWQI, all stations are in a good quality class. The NSFWQIm index range was between 50. 94 to 59.04, index changes were in the range medium. The NSFWQIa and NSFWQIm indexes, classified its quality in mid-class.
Conclusion: They are considering the significance of the Zayande-rood's dam lake as a covering resource of drinkable water of Isfahan. It shows that significant attention in Lake Watershed management is needed to protect water quality.


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