Doohan Semirom river water quality assessment using NSFWQI water quality index

Subject Areas : Environmental pollutions (water, soil and air)

reza rezaei ¹ , haniyeh nowzari ²

1 - MSc Graduated of Environmental Engineering, Environmental Pollution, Department of Environment, Islamic Azad University of Abadeh Branch, Abadeh, Iran.
2 - Assistant Professor, Department of Environment, Abadeh Branch, Islamic Azad University, Abadeh, Iran. *(Corresponding Author)

Received: 2018-05-14 Accepted : 2018-09-05 Published : 2020-03-20

Keywords: Monitoring, Rivers, Doohan, NSFWQI, Water quality index ,

Abstract :

Background and Objective: Creation a regular control schedule and monitoring water quality of the rivers is one of the most important strategies to reduce pollution and improve their quality. Given the importance of Doohan Semirom River as one of the main tourist resorts as well as discharge of various pollutants, its water quality assessment seems necessary.

 

Material and Methodology: Sampling has carried out in August 2016 during a turn and three replications of four stations including the source of the Doohan river, the end of the gardens and farms, before the crown of the Semirom waterfall and after the waterfall and qualitative parameters include DO, pH, TS, BOD, turbidity, temperature, phosphate, nitrate and fecal coliform were measured in the samples and 108 data were collected. The data were weighted using NSFWQI and water quality index was determined for each section of the river.

 

Findings: The results showed that the NSFWQI index of the first station was 59.03, the second station was 57.15, the third station was 57.67 and the fourth station was 36.72 in this river. Due to this, the status of water quality of the first, second and third stations were in the medium class whereas the status of water quality of the fourth station was in the bad class. Therefore, the highest water quality index was for the source of the Doohan river and the lowest one was for the after the waterfall.

 

Discussion and Conclusion: According to the result of this study, the river water from the source to the before the crown of the waterfall had average quality however it is degraded to bad quality after the waterfall. So, the river water was not at high-level from the original which this phenomenon is because of the presence of residences and the livestock of tribe near the fountain of water suppliers. The water quality decreased at the end of the orchards and farms because of using fertilizers and toxins and the runoff of them however the water quality index of this part was in the medium class. After the waterfall, sewage spill of a large amount of human activities and tourism have been the causes of water pollution increasing and water quality decreasing to the bad quality.

 

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