Quality Assessment of Gorganrood River Using NSFWQI Index in Gonbad kavus Urban Area

Document Type : Research Article

Authors

1 MSc. Watershed Management, Faculty of Agriculture and Natural Resources, Gonbadkavus University, Gonbadkavus, Iran

2 Assistant Professor, Department of Rangeland and Watershed Management, Faculty of Agriculture and Natural Resources, Gonbadkavus University, Gonbadkavus, Iran

3 Associate Professor, Department of Rangeland and Watershed Management, Faculty of Agriculture and Natural Resources, Gonbadkavus University, Gonbadkavus, Iran

4 Associate Professor of Chemistry, Faculty of Basic Sciences, Gonbad Kavous University, Gonbad Kavous, Iran

Abstract

Creating a regular control program will allow appropriate strategies to reduce the pollution of riverside catchment and, finally, improve the water quality of these resources. The goal of this study was to investigate the effect urban wastewater on the quality of Gorgan River in the Gonbadkavous basin. Sampling was carried out in the 3 months of autumn of 1396 on a monthly basis with a frequency of two weeks from 4 stations at the distance from the sedelstane to the outlet of the Gorgan River from Gonbadkavus. The quality of NSFWQI index was used to evaluate the quality of the Gorganroud River. Based on the measured factors, the NSFWQI index was calculated for the stations under study. The results showed that the numerical value of this index had the highest value at Gonbadkavos entrance station (p<0.05) and the value of this index decreases from city entrance station to the city exit station. The results were 48.17, 42.72, 43.06 and 40.94, respectively. Interpretation of numerical values based on NSFWQI index for the stations under study shows that the water quality of Gorganrood River in the urban area of Gonbadkavus is poor and the color of this index is also orange. The factors involved in reducing the water quality of the river are based on these two indicators of human factors, such as drainage of untreated urban sewage into the river due to the lack of a sewage collection system, disposal and accumulation of waste and animal waste in the river bed.

Keywords

References

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Iranian journal of Ecohydrology
Volume 7, Issue 2
July 2020
Pages 373-382

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History

  • Receive Date: 22 November 2019
  • Revise Date: 03 April 2020
  • Accept Date: 03 April 2020

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