Temporal Water Quality Patterns in the Talar River: A Multi-Index Approach Using IR-WQISC, NSFWQI, and WILCOX
In this study, the water quality of the Talar River was evaluated based on the National Sanitation Foundation Water Quality Index (NSFWQI), the Iranian Surface Water Quality Index (IRWQISC), and the Wilcox Diagram (WILCOX) at six different stations along the river during a hydrological year from Oct...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Iranian Water Resources Association
2025-02-01
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| Series: | تحقیقات منابع آب ایران |
| Subjects: | |
| Online Access: | https://www.iwrr.ir/article_215613_632c812837ffe2a066960e05438b4d6b.pdf |
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| Summary: | In this study, the water quality of the Talar River was evaluated based on the National Sanitation Foundation Water Quality Index (NSFWQI), the Iranian Surface Water Quality Index (IRWQISC), and the Wilcox Diagram (WILCOX) at six different stations along the river during a hydrological year from October 2022 to September 2023. Subsequently, statistical analyses, including a correlation matrix and a dendrogram diagram, were utilized to study the relationships among various water quality parameters.
In autumn, the poorest water quality based on the IRWQISC index was observed at the fourth station, with a value of 4.16, indicating very poor quality for the river. Additionally, the NSFWQI analysis revealed the worst water quality at the fifth station during summer, with a score of 23.63. However, at the first station in spring, the river's water quality slightly improved due to increased rainfall during this season.
According to the Wilcox Diagram, which depends solely on two parameters—Electrical Conductivity (EC) and Sodium Adsorption Ratio (SAR)—the worst result was observed at the sixth station in autumn. This result, classified as C3S2, corresponds to moderate quality for agricultural purposes.
As we move downstream, it is evident that increased agricultural and urban activities contribute to a decline in water quality across all indices. Moreover, reduced rainfall in certain months significantly exacerbates this deterioration in water quality. |
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| ISSN: | 1735-2347 |